100% in-browser
Health & Fitness Tools
Free health and fitness calculators — BMI, BMR and TDEE, body fat, ideal weight, macros, running pace, heart-rate zones and more. Provided for general information only, not medical advice.
🔥
BMR & TDEE Calculator
Estimate your daily calorie needs (BMR and TDEE) using the Mifflin-St Jeor equation.
◔%Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
⚖Ideal Weight Calculator
Estimate ideal body weight from height using the Devine, Robinson, Miller and Hamwi formulas.
💧Water Intake Calculator
Estimate your daily water needs in liters and cups from weight and exercise time.
🏃Running Pace Calculator
Calculate running pace, time or distance, with pace per km and per mile and speed.
❤Heart Rate Zones
Find your max heart rate and the five training zones from your age and resting rate.
🍷Blood Alcohol (BAC) Estimator
Estimate blood alcohol content from drinks, weight and time using the Widmark formula.
🏋One Rep Max Calculator
Estimate your one-rep max from a lift and see training percentages from 95% to 60%.
🍗Macro Calculator
Split your daily calories into grams of protein, carbs and fat from a ratio preset.
🔥Calories Burned Calculator
Estimate calories burned for an activity from its MET value, your weight and duration.
💪Lean Body Mass Calculator
Estimate lean body mass and fat mass from your height and weight using the Boer formula.
⊙Waist-to-Hip Ratio
Compute your waist-to-hip ratio and the matching WHO health-risk category.
👶Pregnancy Due Date
Estimate a due date from your last period using Naegele's rule, adjusted for cycle length.
🚭Smoking Cost Calculator
See how much smoking costs you per day, week, month, year and over ten years.