Heart Rate Calculator

Based on various calculators. I prefer the Maffetone method since it syncs up well with the heart range which maximizes fat burning and minimizes carbohydrate burning.

Enter Your Numbers

a) Have or are you recovering from a major illness (heart disease, any operation or hospital stay, etc.) or are on any regular medication?
Illness - No
Illness - Yes
b) Are you injured, have regressed in training or competition, get more than two colds or bouts of flu per year, have allergies or asthma, or if you have been inconsistent or are just getting back into training?
Injured - No
Injured - Yes
c) Have you been training for more than two years without any of the problems in (a) and (b), and have made progress in competition without injury?
Trained 2 years - No
Trained 2 years - Yes
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Maximum Aerobic Function (MAF) Heart Rate Calculations

This heart rate range is based on the Phil Maffetone 180-age Heart Rate numbers.

Concept 2 Rower Heart Rate Calculations

These are based on the Concept 2 Rower Training Heart Rate Range numbers. Max HR based on (Inbar, O. Oten, A., Scheinowitz, M., Rotstein, A., Dlin, R. and Casaburi, R. Normal cardiopulmonary responses during incremental exercise in 20-70-yr-old men. Med Sci Sport Exerc 1994;26(5):538-546.)

Niko Niko Heart Rate Calculations

Based on Niko Niko Heart Rate numbers.

220 Minus Age Heart Rate Calculations

Here is an interesting read THE SURPRISING HISTORY OF THE “HRmax=220-age” EQUATION.

Robergs & Landwehr Heart Rate Calculations

FATmax Calculations

This is based on the paper Determination of the Exercise Intensity that Elicits Maximal Fat Oxidation. The maximum heart rate was determined using the Robergs & Landwehr Heart Rate Calculations (above).


Use this information at your own risk and with the advice of your medical professional. We are not doctors nor do we pretend to be one on the Internet. We do not take responsibility for errors in these calculations. We do not guarantee that these numbers will work for people at the extremes of the ranges. If you start to exercise you could drop over dead - don't blame us if you die. If you discover an error in calculation, please let us know through email: keto at land-boards dot com.

Privacy Information: This calculator runs locally on your computer. None of your personal data is stored on our server. We are low carb and we don't do cookies of any sort.