Health & Fitness Calculators
15 calculators for BMI, calories, weight and exercise.
BMI Calculator
Body mass index and healthy weight range
Calculate →Daily Calorie Need Calculator
BMR and TDEE calculation (Mifflin-St Jeor)
Calculate →Ideal Weight Calculator
Ideal weight via Devine, Hamwi and BMI formulas
Calculate →Basal Metabolic Rate Calculator
Daily calorie needs at rest (BMR)
Calculate →Daily Water Intake Calculator
Daily water needs by weight and activity level
Calculate →Pregnancy Calculator
Estimated due date and week from last period
Calculate →Quit Smoking Savings Calculator
Money saved and health gains after quitting smoking
Calculate →Protein Intake Calculator
Daily protein needs based on body weight
Calculate →Maximum Heart Rate Calculator
Maximum and target heart rate range by age
Calculate →Calorie Burn Calculator
Calories burned by exercise type and duration
Calculate →Jump Rope Calorie Calculator
Calories burned jumping rope
Calculate →Stair Climbing Calorie Calculator
Calories burned climbing stairs
Calculate →Swimming Calorie Calculator
Calories burned by swimming style and duration
Calculate →Lean Body Mass Calculator
Body mass excluding fat tissue
Calculate →Hair Growth Calculator
Hair growth time and target length calculation
Calculate →How to Use These Health Calculators
The 15 tools in this category answer common numeric questions about your body: how many calories you need, what your ideal weight is and how much water to drink each day. The calorie and basal metabolic rate calculators use the Mifflin-St Jeor equation, one of the most widely validated formulas. The ideal weight tool shows the Devine, Hamwi and BMI-range methods side by side, so you can compare results instead of relying on one formula.
If you are not sure where to start, check your current status with the BMI tool, then calculate your daily calorie needs, then set a protein target for your goal (losing weight, maintaining or building muscle). The calorie burn, swimming, jump rope and stair climbing tools are based on MET values and estimate burn from your weight and the duration. The maximum heart rate tool works out your cardio zones from your age.
Every tool here gives estimates and runs in your browser; no health data is sent to a server. Results are not medical advice. If you have a chronic condition, or are pregnant or breastfeeding, make nutrition and exercise decisions with a physician or dietitian.