180 calculators

Congratulations, you just found the most random collection of calculators available on the Internet! Are you a hardcore geek? We’ll help you pick a motor for your drone. A travel junkie? Use our calculator to choose the optimal sunscreen SPF for holidays in Bali. A keen photographer? We’ll help you plan out a perfect star time lapse. A jeweler? You can’t go wrong with our diamond weight calculator. We have it all, from gardening to makeup to cargo shipping so long as there’s a formula for it. And if we don’t have it yet (and you think we should), drop us a line - we’ll create a calculator just for you!

Test Grade Calculator

With this test grade calculator, you'll quickly determine the test percentage score and grade.

Download Time Calculator

This download time calculator will help you determine how long it will take to complete a file download over a given internet download speed. Keep on reading to learn more about file sizes, download speed, and other related topics.

KD Calculator (Kill/Death Ratio)

Master your gaming skills by learning how to calculate the KD ratio with our efficient kill death ratio calculator. Elevate your play now!

Sunbathing Calculator

Do you always remember to put on sunscreen before going outside? Are you sure that you use enough? The Sunbathing Calculator ☀ will tell you when's the time to go back under an umbrella not to suffer from a sunburn!

Aquarium Calculator

Using this aquarium calculator, you can find out how much water your fish tank can hold.

eDPI Calculator

The eDPI, or effective dots per inch, describes the real mouse sensitivity. This eDPI calculator lets you determine the eDPI depending on DPI and sensitivity.

Battery Capacity Calculator

Battery capacity calculator converts between amp-hours and watt-hours.

TV Mounting Height Calculator

Use the TV mount height calculator to find out how high to hang a TV. Additionally, you can estimate the ideal TV height for any tilt angle.

Music Interval Calculator

The music interval calculator determines the interval between two notes.

Minecraft Stack Calculator

The Minecraft stack calculator tells you how many stacks of an item you have with a certain total number of items. It can convert a total into stacks and vice versa.

Flag Calculator | USA

Use the flag calculator to compute the proper proportions for every element of the American flag 🇺🇸

Data Transfer Calculator

Use this data transfer calculator to find out how much time it's going to take to back up your computer to the cloud, and make sure you're getting what you pay for from your internet service provider.

Screen Size Calculator

The screen size calculator finds the physical dimensions such as height, width, and the area of the screen.

Aspect Ratio Calculator

Aspect ratio calculator allows you to quickly resize your files to fit in a designated area.

Final Grade Calculator

Find out what you need to score on your final exam and explore efficient study strategies with our user-friendly Final Grade Calculator.

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Classroom Spacing Calculator - Coronavirus

The classroom spacing calculator analyzes how may students can fit in the classroom while respecting social distancing rules.

College GPA Calculator

Find out your higher education GPA with this college GPA calculator. Enter up to 30 courses and their credits, and add your previous scores optionally to calculate your GPA and cumulative GPA.

Final Grade Calculator

Find out what you need to score on your final exam and explore efficient study strategies with our user-friendly Final Grade Calculator.

GPA Calculator

If you're racking your brain on how to calculate your GPA, our GPA calculator is the answer to your struggles.

GPA Calculator Pakistan

Discover how to calculate your GPA in Pakistan and convert GPA to percentage effortlessly. Plan for academic success today!

Grade Calculator

The grade calculator calculates your overall grade based on your component marks (weighted and unweighted).

GWA Calculator – General Weighted Average

This GWA calculator will help you determine your general weighted average for different grading systems used in the Philippines, like the point grading system or letter grading system.

High School GPA Calculator

With this high school GPA calculator, determining your unweighted and weighted GPA will be a piece of cake!

IELTS Score Calculator

The IELTS score calculator helps English learners check their overall scores based on the partial score for each test component.

Impact Factor Calculator

Know the importance and standing of a journal using our impact factor calculator.

Semester Grade Calculator

Use this semester grade calculator to estimate your overall semester performance.

Test Grade Calculator

With this test grade calculator, you'll quickly determine the test percentage score and grade.

3D Render Calculator

The 3D render calculator estimates how long your animation will take to render. Need to meet a deadline? Find out the maximum render time per frame or how many machines you need to finish on time.

Aspect Ratio Calculator

Aspect ratio calculator allows you to quickly resize your files to fit in a designated area.

Blink-free Photo Calculator

The blink-free photo calculator makes science do the work for you – next time at a gathering, you'll know how many times to press the shutter to get that one perfect picture.

Camera Field of View Calculator

How much of that landscape will fit in your pictures? Discover it with our camera field of view calculator!

Crop Factor Calculator

The crop factor calculator tells you the effective focal length and aperture f-stop of your camera in terms of standard 35mm lenses.

Depth of Field Calculator

Find out the depth of field of your camera and lens setup to capture more exciting photos using this depth of field calculator.

Exposure Calculator

This exposure calculator will help you determine the equivalent exposure value from the three common camera settings: aperture opening, shutter speed, and ISO sensitivity.

Film Calculator

This film calculator calculates the film length required to capture the desired run time or vice versa.

Focal Length Calculator

The focal length calculator allows you to compute magnification, angle of view as well as the focal length needed for a picture of a distant object.

Frames to Timecode Calculator

This frames to timecode calculator helps you to identify the correct frame in a recorded video.

Hyperfocal Distance Calculator

Find out where to focus your camera to achieve the greatest depth of field using this hyperfocal distance calculator.

Image File Size Calculator

This image file size calculator will help you estimate the file size of an uncompressed image file at a given pixel count and bit depth.

Image Ratio Calculator

Determine the desired proportion of an image with this image ratio calculator.

Magnification of a Lens Calculator

Discover your lens magnification (and other properties) with our lens magnification calculator

Pixels to Print Size Calculator

This pixel to print size calculator will help you solve the print size dimensions of an image file for any given pixel density.

PPI Calculator (Pixels Per Inch)

PPI or Pixels Per Inch is one of the most common measurements of pixel density. Use the PPI calculator to calculate the dpi of any screen.

Projector Calculator

The projector calculator finds the optimum viewing distance and throw distance for a specific projection size.

Resolution Scale Calculator

The resolution scale calculator helps you measure your digital resolution's up-scaled or down-scaled values while maintaining the original aspect ratio.

Screen Size Calculator

The screen size calculator finds the physical dimensions such as height, width, and the area of the screen.

Shutter Speed Calculator

This shutter speed calculator will help you determine the shutter speed settings on your camera to capture great photos at your chosen lighting condition, aperture, and ISO settings.

Timecode to Frames Calculator

This timecode to frames calculator converts the timecode appearing in a video to the frame number.

Time Lapse Calculator

Time lapse calculator helps you determine the perfect parameters for your time-lapse.

TV Mounting Height Calculator

Use the TV mount height calculator to find out how high to hang a TV. Additionally, you can estimate the ideal TV height for any tilt angle.

TV Size Calculator

TV distance and TV size calculator lets you find out the ideal size of your TV or its distance from your eyes.

Vertical Exaggeration Calculator

Our vertical exaggeration calculator uses a scale that emphasizes particular objects on 3D maps and drawings. You can also learn about its formula and uses.

Video File Size Calculator (by format)

The video file size calculator determines how much space a video takes up on your disk, depending on the video format and compression.

Video Frame Size Calculator

This video frame size calculator finds the data size of a video frame based on the resolution and color depth.

Audio File Size Calculator

This audio file size calculator will help you estimate how much space an uncompressed audio file will take up. You will also learn about audio bit depth, sample rate, and more stuff about digital audio. Keep tuned in to learn more.

BPM Calculator

The BPM calculator converts between beats per minute and beat duration. It also determines notes duration.

Chord Finder

The chord finder will determine what chord you're hearing/playing based on what notes you detect in the chord.

Chord Inversion Calculator

The chord inversion calculator will help you determine the notes in any chord and the order in which they appear.

Chord Progression Generator

The chord progression generator lets you find out what chords you need for a chosen chord progression in a given key.

Chord Transposer

The chord transposer can move your chords from one key to another or move them up or down by intervals.

Delay and Reverb Calculator

With our delay and reverb calculator, you can obtain the times needed to keep the delay or reverb in sync with your song.

Fret Calculator

Planning to build your very own DIY guitar or ukulele? This fret calculator will help you determine the precise positions where you should place the frets on your instrument's fingerboard. Hop in to learn more about it.

Guitar String Tension Calculator

Ever wonder how much tension your guitar strings experience? Use this guitar string tension calculator to find out.

Key Signature Calculator

Use the key signature calculator to identify a key and the number of sharps and flats in a piece of music.

Music Duration Calculator

The music duration calculator determines how long your musical piece will take to perform by using the piece's time signature, tempo, and a number of measures, as well as an easy formula.

Music Scale Calculator

The music scale calculator determines the semitone pattern, the numeric formula, and the notes of over 60 scales.

Music Transposition Calculator

The music transposition calculator helps you transpose music to a different key.

Note Frequency Calculator

Choose the name of a musical note and the note frequency calculator will output its frequency.

Port Length Calculator

With this port length calculator, you will be able to figure out your subwoofer's vent length in no time.

Speaker Box Calculator

This speaker box calculator will help you find the board measurements for your do-it-yourself speaker box and your speaker box's internal volume. Also, you can determine your speaker driver's approximate displacement.

Vocal Range Calculator

The vocal range calculator lets you find your vocal range and determines which classical voice type you best fit into.

3D Printing Cost Calculator

This 3D printing cost calculator helps you to determine the quote for a 3D printing job.

Amdahl's Law Calculator

Amdahl's law calculator predicts the effect of speeding up a portion of a task on its overall speed.

Battery Life Calculator

If you want to know how many hours your battery will run before discharging, give this battery life calculator a try.

Battery Size Calculator

Find out the remaining capacity of your battery using Omni's battery size calculator.

Cable Impedance Calculator

When transmitting a signal over a cable, it is crucial to know the impedance of the cable. Is it a coaxial cable? Is it a twisted pair? It doesn't matter. Omni's Cable Impedance calculator will give you the results, including the capacitance, inductance, delay, and more!

CIDR Calculator — Classless Inter-Domain Routing

The CIDR calculator will give you the IP range of any network block given in CIDR notation and convert an IP range to CIDR notation.

Crosstalk Calculator

Want to know what is crosstalk in simple terms? Want to know the specific crosstalk in your circuit? Then Omni's crosstalk calculator is for you, Get ready to learn and get all the crosstalk solutions you've been seeking.

Drone Flight Time Calculator

Wondering how long your drone will hover in the air? Check out this drone flight time calculator!

Drone Motor Calculator

Choose the perfect motor and get your drone flying with this drone motor calculator.

Duty Cycle Calculator

Learn how to calculate the duty cycle of a periodic system with Omni's duty cycle calculator: insert what you know, and we'll do the math!

eDPI Calculator

The eDPI, or effective dots per inch, describes the real mouse sensitivity. This eDPI calculator lets you determine the eDPI depending on DPI and sensitivity.

Floating-Point Calculator

The floating-point calculator converts the binary representation of 32-bit floating-point numbers into real numbers and back again according to the IEEE754 standard. It has handy features like conversion to hexadecimal representations, calculation of the conversion error, and separate input fields for the sign, exponent, and fraction of your float32.

GSD Calculator – Ground Sample Distance

Calculate the ground sample distance for aerial surveys using our GSD calculator.

Hamming Code Calculator

With our Hamming code calculator you will be able to encode a message using linear codes, detect errors and more!

Hamming Distance Calculator

How much do two messages differ? Learn with our Hamming distance calculator!

Impedance Matching Calculator

Use the impedance matching calculator to find the appropriate values of the electronic components in the L-match, Pi-match, or T-match topology.

LM317 Calculator

Omni's LM317 calculator can help you decide what external resistors to choose to get the required output voltage from the LM317 voltage regulator.

Logic Gate Calculator

Use Omni's logic gate calculator to generate the truth table for all logic gates.

Op-Amp Gain Calculator

Omni's op-amp gain calculator can help you to determine the voltage gain of an operational amplifier.

Parity Bit Calculator

Use our parity bit calculator to count your blessings and bits to understand if your message was transmitted correctly!

Password Entropy Calculator

This password entropy calculator can compute how strong your password is.

PCB Impedance Calculator

Why would anyone calculate PCB impedances by hand, when creating some new electronics? Exactly! At Omni Calculator thought the same, and hence we have developed this PCB Impedance calculator: the only tool you'll need to get your numbers in a second.

PCB Trace Current Calculator

Are you trying to find the current capacity of your PCB trace? This is your place! The PCB trace current calculator will tell you precisely what you want to know!

PCB Trace Resistance Calculator

The PCB trace resistance calculator is the easiest way to calculate the resistance of any trace in a PCB.

PCB Trace Width Calculator

Do you want to know how wide your PCB traces should be? Come in to find the solution for both internal or external PCB traces.

Pi Attenuator Calculator

Our pi attenuator calculator is perfect if you want to build an attenuator and don't know how many ohms to use in your resistors.

Propagation Delay Calculator

The propagation delay calculator allows you to calculate how long it takes a signal to travel over a network from its sender to its receiver.

RAID Calculator

This RAID calculator will help you decide which configuration of disks (RAID level) is right for you, based on usable capacity, fault-tolerance, performance, and cost.

RF Unit Converter

Convert your RF units using Omni's RF unit converter. Peak voltage to voltage RMS, power RMS to dBmW, and many more!

Total Harmonic Distortion Calculator

The total harmonic distortion calculator is a tool that converts signal distortion from percent to decibel value and vice versa.

Bandwidth Calculator

With the bandwidth calculator you can determine the time needed to download a specific file.

Baud Rate Calculator

Baud rate calculator is a self sufficient tool that determines the baud rate of waves using four different methods to choose from.

Data Transfer Calculator

Use this data transfer calculator to find out how much time it's going to take to back up your computer to the cloud, and make sure you're getting what you pay for from your internet service provider.

Download Time Calculator

This download time calculator will help you determine how long it will take to complete a file download over a given internet download speed. Keep on reading to learn more about file sizes, download speed, and other related topics.

IP Subnet Calculator

Given an IP address and a subnet mask, this IP subnet calculator will show you everything you need to know about the network and IP address.

Streaming Bitrate Calculator

With this streaming bitrate calculator, you can calculate the optimum bitrate for your self-hosted or platform-hosted stream.

Upload Time Calculator

Use this upload time calculator to find out how long it will take for your files to be uploaded given your connection's upload speed.

Impostor Odds Calculator – Among Us

Use this calculator if you want to quickly find out what are the odds of being the Impostor when playing Among Us!

KD Calculator (Kill/Death Ratio)

Master your gaming skills by learning how to calculate the KD ratio with our efficient kill death ratio calculator. Elevate your play now!

Minecraft Circle Generator

The Minecraft circle generator can generate circles and ellipses for you to build in Minecraft. Allows for variable width, height, and thickness.

Minecraft End Portal Finder

Use two Eyes of Ender to triangulate the location of the nearest End Portal. Works for both Bedrock and Java editions.

Minecraft Stack Calculator

The Minecraft stack calculator tells you how many stacks of an item you have with a certain total number of items. It can convert a total into stacks and vice versa.

Nether Portal Calculator

The Nether portal calculator firstly determines the coordinates of a Nether portal for both the Overworld and the Nether. It also calculates how many obsidian blocks you'd need to build a Nether portal.

Pokémon Go Candy Calculator

Maximize your gameplay by figuring out how many Pokémons you can evolve with our candy calculator. Efficient, quick, and easy. Try now!

Pyramid Block Calculator

This pyramid block calculator will tell you how many blocks you need to build a Minecraft pyramid of any height and dimensions.

Rust Decay Calculator

Check out our Rust decay calculator to see how much time your structures have before they disappear! Just input their current health and the material they are built of, and our calculator will do the rest.

The Witcher: Monster Slayer Calculator

Have you ever wanted to become a witcher? Now you can! Use our calculator to find out how long it will take you to become the best of the best in The Witcher: Monster Slayer!

Dimensional Weight Calculator

Dimensional weight calculator estimates the volumetric weight - the variable used by postal services in determining the cost of shipment.

DPMO Calculator

Use this DPMO calculator to find out the popular measure of process performance - defects per million opportunities.

Reorder Point Calculator

Reorder point calculator tells you exactly when you need to reorder to prevent shortages and avoid overstock.

Takt Time Calculator

The takt time calculator tells you the required average manufacturing time per product in order to meet demand.

Christmas Tree Calculator

Welcome to the Christmas tree calculator, where you will find out how to decorate your Christmas tree in the best way. Take a look at the perfect Christmas tree formula prepared by math professors and improved by physicists. Plan in advance how many lights and decorations you'll need!

Christmas Countdown Calculator

Chubby Santas here, there, and everywhere, blinking tree lights, "Jingle bells," and "Last Christmas" on the radio... that's definitely a sign that Christmas is coming!

Easter Calculator

The Easter calculator will give you an exact date of Easter Sunday for any given year.

Vampire Apocalypse Calculator

Vampire apocalypse calculator shows what would happen if vampires were among us using the predator - prey model.

Mayan Calendar Converter

Convert a date to the ancient Mayan calendar with our Mayan calendar converter.

New Year's Resolutions Calculator

The New Year's Resolutions Calculator helps you to choose your resolution for the New Year and realize how much you can benefit from introducing changes in your life!

Snowman Calculator

The perfect snowman calculator uses math & science rules to help you design the snowman of your dreams!

Trick-or-Treat Calculator

Use this trick-or-treat calculator to find out how much candy you'll need for Halloween this year, or to estimate how much your container can hold.

White Christmas Calculator

Are you longing for gorgeous white Christmas in your city? 🎄 Yearning for snow to build a snowman with your children? Or just worrying about how Santa Claus will come to your home without his sleigh? Check the white Christmas calculator to find out if you have a real chance for a white Christmas this year! ❄️✨

Zombie Invasion Calculator

The zombie invasion calculator allows you to simulate the development of a zombie invasion minute by minute.

Antipode Calculator

Ever wondered if there is someone on the other side of the globe? Find it out using our antipode calculator, and learn how to calculate your antipode!

Azimuth Calculator

Azimuth calculator finds the azimuth from the latitude and longitude of the initial and final point.

Earthquake Calculator

Use our earthquake calculator to discover the secrets of a fascinating – though terrifying – natural phenomenon.

Latitude Longitude Distance Calculator

This latitude longitude distance calculator will obtain the distance between any two points on Earth's surface given their coordinates.

Rainfall Calculator

Why does it rain? How much water falls onto my backyard when it rains? For all of that and more, check out this rainfall calculator.

Rain to Snow Calculator

Our rain to snow calculator allows you to calculate the amount of snow there is going to be depending on how low the temperature will be.

Sunbathing Calculator

Do you always remember to put on sunscreen before going outside? Are you sure that you use enough? The Sunbathing Calculator ☀ will tell you when's the time to go back under an umbrella not to suffer from a sunburn!

Wind Chill Calculator

Be prepared for cold weather with the wind chill calculator. Using the air temperature and wind speed, our calculator knows how to calculate wind chill precisely, so you know how cold it's going to feel when you step outside.

Age on Other Planets Calculator

This calculator helps you compute your age and upcoming birthdays on other planets. You can either input your *Date of Birth* or your current *Age* to have the results.

Angle of Impact Calculator

Our angle of impact calculator will give you a lead in your investigations, with math!

Aquarium Calculator

Using this aquarium calculator, you can find out how much water your fish tank can hold.

Aquarium Glass Thickness Calculator

The aquarium glass thickness calculator finds required aquarium thickness, volume, glass surface area, and weight for any given measurements.

Recruitment Process Duration Calculator

In this calculator, you can estimate the number of hours recruiters need to find the right candidates for your firm!

Day of the Week Calculator

This day of the week calculator is a safe bet if you want to check out what was the day of the week when you were born - or any other past or future date you imagine.

Diamond Weight Calculator

Find the diamond weight 💎 with our diamond weight calculator. The tool handles twelve different diamond shapes.

Encounter Calculator 5e

The encounter calculator for 5e DnD will help you plan out a combat encounter and ensure it has an appropriate difficulty for your party.

Engagement Rate Calculator

Use this engagement rate calculator to find out what's the value of this statistic for your content and social media profiles.

Flag Calculator | USA

Use the flag calculator to compute the proper proportions for every element of the American flag 🇺🇸

Gender Pay Gap Calculator

The gender pay gap calculator lets you calculate how much your paycheck is affected by your gender for different countries.

Cost of Hiring an Expert vs. Hiring a Fresher Calculator

Use this calculator to discover what would cost you more over time — hiring an expert or a fresher.

HP Calculator 5e – Dungeons & Dragons

The HP calculator for 5e Dungeons and Dragons helps you calculate your character's maximum HP based on their classes, levels, Constitution modifier, and other once-off choices like race, subclasses, and feats. It delivers a beginner-friendly yet in-depth breakdown of how your maximum HP is determined.

Matched Betting Calculator

Our matched betting calculator can help you to calculate the optimal lay stake and risk-free profit.

NaNoWriMo Calculator

Planning to write a novel this November (or whenever)? The NaNoWriMo calculator is here with a helpful mix of stats and motivation!

Oxygen Tank Duration Calculator

The oxygen tank duration calculator informs you of how long different oxygen cylinders will last you.

Pay Gap Calculator

This pay gap calculator shows the difference between the median wages of US full-time working men and women. It shows the differences in earnings not only by gender but also according to race/ethnicity and occupation. Hypothetically, how much would I earn if I were a white man or Latino woman? Check it out!

PERT Calculator

The PERT calculator uses the program evaluation and review technique to help you accurately plan your personal and work-related projects.

Pizza Tip Calculator

The pizza tip calculator will help you work out how much you tip a pizza delivery driver!

Point Buy Calculator 5e

The point buy calculator for 5e Dungeons and Dragons helps you assign your character's ability scores according to the Player Handbook's point buy rules. It also lets you tweak the system according to your table's house rules.

Poker EV Calculator

The poker EV calculator determines the long-term profitability of a play — using the odds of winning and losing and the money you'd gain or lose.

Poker Odds Calculator

The poker odds calculator will determine the odds that you win, tie, or lose a given Texas hold 'em round, given what cards are dealt to you and what cards are on the table.

Salt Dough Calculator

With our salt dough calculator, you will find the recipes and simple instructions for your salt dough crafting.

Sandbox Calculator

The sandbox calculator will compute the right amount of sand for your children's playground — considering their age and the shape of the box.

Dating Theory Calculator

Use the dating theory calculator to enhance your chances of picking the best lifetime partner.

Streaming Services' Royalties Calculator

The streaming royalties calculator allows you to check the estimated amount of royalties an artist gets from your usage of popular streaming services.

Tip Calculator

Use the tip calculator to avoid awkward situations at the restaurant or bar. Know exactly how much you and your friends should tip, every time.

Tip from Net Price Calculator

Use the tip from net price calculator to find out how much you should tip if you don't take taxes into account.

16:10 Aspect Ratio Calculator

This convenient 16:10 aspect ratio calculator allows you to resize your files to fit the 16:10 aspect ratio.

16:9 Aspect Ratio Calculator

Use this 16:9 aspect ratio calculator to quickly resize your files to fit in the 16:9 aspect ratio.

4:3 Aspect Ratio Calculator

We designed this 4:3 aspect ratio calculator to help you resize your files while maintaining the 4:3 aspect ratio.

CSS Aspect Ratio Calculator

Our CSS aspect ratio calculator allows you to quickly resize your files to fit in a designated area.

Days Until Fall Calculator

Eagerly count down how many days until autumn with our intuitive days until fall calculator. Anticipate the change of season accurately. Try it now!

Days Until Valentine's Day Calculator

With our days until Valentine's Day calculator, you will always be ready to celebrate the sweetest occasion of the year!

Diamond Carat Calculator

This diamond carat calculator finds carats or grams of a diamond based on its width and length.

Even Parity Bit Calculator

Discover what even parity is and generate 3-bit even parity easily with our calculator. Ideal for quick, accurate binary computations.

mm to carat conversion

The mm to carat conversion calculator will convert a diamond of any shape into a weight unit - carats.

New Year Countdown Calculator

3...2...1 Happy new year! The new year countdown calculator allows you to prepare for the first celebration of the year in time.

Odd Parity Bit Calculator

Use this odd parity bit calculator to generate an encoded message or detect an error in the message you received.

Parity Calculator

Even or odd? Omni's parity calculator will give you the answer to this seemingly trivial question!

Pixel Aspect Ratio Calculator

Use this pixel aspect ratio calculator to resize pixels to adapt them according to different aspect ratios.

Portrait Aspect Ratio Calculator

We designed this portrait aspect ratio calculator to help you adjust your files to fit the desired portrait aspect ratio.

Screen Ratio Calculator

Our screen ratio calculator allows you to quickly resize your files to fit in a designated area.