Karvonen Formula Calculator
The Karvonen formula calculator operates both of the Karvonen methods:
 Maximum heart rate; and
 Target heart rate calculations. 💓
Don't stop here; the article below will help you find answers to:
 What is the Karvonen formula and what can we use it for;
 How to calculate Karvonen formula; and
 ... many, many more.
Why do we need the target heart rate?
Have you ever encountered a text similar to "you need some moderate exercise at least five times a week"? We're guessing yes, and it doesn't come as a surprise.
CDC, American Heart Association, Mayo Clinic, and Department of Health and Human Services are some of many sources that agree that the minimum level of exercise needed for a healthy lifestyle comes in moderate intensity and requires you to move your bones at least five days out of 7.
But how can we tell if the exercise is moderate? 🤔
A moderate exercise considerably elevates your heart rate; allows you to talk but doesn't let you sing. Your breathing becomes more intense. However, these are all tips and hints; if we want to be precise, we come in need of tools like the Karvonen method calculator and the target heart rate.
We can calculate moderate exercise as 5070% of the maximum heart rate; however, we may also use the Karvonen equations to precisely estimate the heart zones we'd like to achieve.
💡 The heart rate calculators using Karvonen and
equations find their place among the most popular online THR (target heart rate) estimations methods.How do I calculate target heart rate using the Karvonen formula?
Karvonen formula for target heart rate (THR) requires you to know a few fundamental values:
 MHR — Maximum heart rate in beats per minute:
If you don't know your MHR, calculate it easily using your age:220Age
;  RHR — Resting heart rate in beats per minute; and
 Intensity of the exercise given in percentage (%).
The equation for the target heart rate reads:
THR = ((MHR − RHR) × Intensity) + RHR
How do I calculate Karvonen formula for maximum heart rate?
The Karvonen formula for maximum heart rate is as simple as that:
Maximum heart rate = 220 − Age
where:
Maximum heart rate
is given in beats per minute (bpm); andAge
is given in years.
How to use this Karvonen formula calculator?
Let's explain a few simple steps between you and the answer you're looking for:

Input your resting heart rate.

Enter or calculate your maximum heart rate.
Your maximum heart rate will be calculated automatically after you enter your age.

Choose the intensity of the exercise.
The intensity of your exercise depends on what your goals are: For moderate exercise, choose 5070%;
 For the fatburning zone, choose 6080%. (find out more in the fat burning zone calculator)

That's it — enjoy your results! 🎉
FAQ
How do I calculate heart rate reserve?
Heart rate reserve can be easily calculated. We need to:

Find the maximum heart rate and resting heart rate. Use the Karvonen method for maximum heart rate:
Maximum heart rate = 220 − Age

Use the following formula:
Heart rate reserve = Maximum heart rate − Resting heart rate

Substitute the values found in Step 1.

Calculate.
All the variables above are given in beats per minute (bpm).
How do I calculate the target heart rate for fat burning zone?
We calculate the target heart rate (HR) by using the Karvonen formula:
Target HR = ((Maximum HR − Resting HR) × Intensity %) + Resting HR
Let's use the average values of Resting HR (70 bpm) and Maximum HR typical for a 20years old (200 bpm).
The fat burning zone starts at 60% of the intensity of the exercise.
Target HR = ((200 bpm − 70 bpm) × 60%) + 70 bpm
Target HR = 148 bpm
Intensity  Heart rate (bpm) 
50%   
60%   
70%   
80%   
90%   
100%   