Seven calculators
Fitness calculators
Every calculator uses the same tested calculation engine, shows the formula it applied, and runs entirely in your browser. Pick a single number, or run them all at once.
All-in-One Fitness Calculator
One set of inputs, every number: BMI, BMR, maintenance, target and macros. Four short steps produce a dashboard of BMI, BMR, maintenance, goal calories, your daily adjustment and macros, each with an expandable explanation.
BMR Calculator
Estimate the energy your body uses at complete rest.
- Inputs:
- Age, sex, height, weight
- Expected result:
- Estimated basal metabolic rate in kcal per day
TDEE Calculator
Estimate the total energy you use across a normal day.
- Inputs:
- Age, sex, height, weight, activity level
- Expected result:
- Estimated maintenance energy range in kcal per day
Calorie Calculator
Turn your maintenance estimate into a daily calorie target.
- Inputs:
- Body details, activity level, goal and pace
- Expected result:
- Maintenance calories and a goal calorie range
Calorie Deficit Calculator
See how large your deficit is and how aggressive it looks.
- Inputs:
- Maintenance estimate, deficit percentage or weekly pace
- Expected result:
- Daily and weekly deficit with an intensity label
Macro Calculator
Split a calorie target into protein, carbohydrates and fat.
- Inputs:
- Calorie target, body weight, goal, method
- Expected result:
- Grams and calories for each macronutrient
BMI Calculator
Place your height and weight on the standard adult BMI scale.
- Inputs:
- Height, weight, optional age
- Expected result:
- BMI score, category and healthy-weight range