Health & Fitness Calculators
10 free calculators for body metrics, nutrition, and reproductive health.
Health and Body Calculators
Understanding your body metrics is the first step toward better health. These 10 free tools use established medical and nutritional formulas to give you accurate, personalised estimates for everything from daily calorie needs to pregnancy milestones.
Body Composition
BMI (Body Mass Index) gives a quick weight-to-height ratio. Body Fat Percentage uses the US Navy formula (neck, waist, and hip measurements) for a more accurate picture of body composition. Ideal Body Weight calculators use the Devine, Hamwi, and Robinson formulas to give you a target range.
Nutrition and Energy
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest. TDEE (Total Daily Energy Expenditure) multiplies your BMR by an activity factor to give the total calories you burn each day. The Calorie Burn Calculator estimates calories burned for over 50 specific activities. The Water Intake Calculator recommends daily hydration based on your weight and activity level.
Reproductive Health
The Pregnancy Due Date Calculator estimates delivery date from the last menstrual period (LMP) or conception date. The Ovulation / Fertility Calculator identifies the fertile window in a woman's cycle.