Your world in 710 free calculators

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About us

In a surprisingly large part, our reality consists of calculable problems. Should I buy or rent? What's my ideal calorie intake? Can I afford to take this loan? How many lemonades do I need to sell in order to break even? Often times we don't solve these problems, because we lack knowledge, skills, time or willingness to calculate. And then we make bad, uninformed decisions.

Omni Calculator is here to change all that - we are working on a technology that will turn every* calculation-based problem trivial to solve for anyone.

*within reason

The most popular calculators

Compound interest

With the compound interest calculator, you can accurately predict how profitable certain investments will be for your portfolio.


Exponent calculator helps you find the result of any base raised to a positive or negative exponent.

Grams to cups

The grams to cups calculator converts between cups and grams. You can choose between 20 different popular kitchen ingredients or directly type in the product density.


GST calculator figures out a price of product including Goods and Service Tax.


Use the online margin calculator to find out the selling price, the cost or the margin percentage itself.