FitMath fitness calculator aims to provide you with accurate numbers regarding your health enabling you to optimize your fitness journey be it fat loss or gaining mass or just living healthy. FitMath provides a wealth of information about both your fitness workout regimen and your nutrition plan.

FitMath will cater to both the beginner trying to gather fitness data about themselves and the more advanced fitness enthusiast equally. It spans from basic calculators like BMI, ideal weight and heart rate to more advanced calculators for BMR, TDEE and body fat.

Calculators available:
Body Mass Index (BMI)
Basal Metabolic Rate (BMR)
Total Daily Energy Expenditure (TDEE)
Ideal weight
Maximum Heart Rate (MHR)
Target Heart Rate (THR)
Calorie Deficit/Excess
Macro nutrients split (protein, fats, carbs)
Body Fat Estimate (U. S. Navy and YMCA)
Lean Body Mass (LBM) estimate
Lean Body Mass and BMR from known body fat
Protein Intake
Creatine Intake
Body Surface Area

Other features:
Android design guidelines followed
Support for imperial and metric units
Comprehensive help for each and every section explaining every concept
Multiple formulas for many calculators BMR, TDEE, Body fat, max and target heart rate and more.


The TDEE (total daily energy expenditure) calculated is very accurate for your fitness level. The TDEE is also used as an input in the Macro Split calculator. The macro split calculator supports common fitness goals, custom goals, a deficit/excess calculator, common nutrition plans like keto, body builder, zone diet and even custom nutrition splits.

The heart rate calculators are very important for your cardio vascular fitness. They would be useful to determine your target heart rate for your workout be it a small warm up, endurance training, fat burning or High Intensity Interval Training (HIIT).

More useful calculators are in the works! If you find the app useful and want to support my future app development, please consider making a donation with a simple in app purchase ('Donate' in the menu). If you happen to find any mistakes in the calculators, please send an email to me with the information and I'll promptly correct it. You could also send me your feature requests and let me know about what other calculators you wish to see in the app and what could be done better. I am passionate about health and fitness and want to make this app the best it can be.

Note about permissions:
INTERNET: For the in app billing in case you wish to donate.
VENDING: For the in app billing in case you wish to donate.