Health & Fitness Calculators
15 free tools for BMI, calories, weight and fitness tracking.
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 the most common numeric questions about your body: how many calories you need, what your ideal weight is, how much water to drink daily. The calorie and basal metabolic rate calculators use the Mifflin-St Jeor equation, the most extensively validated formula, while the ideal weight tool combines the Devine, Hamwi and BMI-range methods so you get a comparative estimate instead of relying on a single formula.
If you are not sure where to start, follow this order: check your current status with the BMI tool, then calculate your daily calorie needs, then set your protein target based on your goal (losing weight, maintaining, building muscle). On the exercise side, the calorie burn, swimming, jump rope and stair climbing tools are based on MET values and estimate burn from your weight and duration. The maximum heart rate tool maps your cardio zones by age.
Every tool here produces estimates and runs entirely in your browser; no health data is sent to any server. Results are not medical advice. If you have a chronic condition, are pregnant or breastfeeding, make nutrition and exercise decisions together with a physician or dietitian.