Health & Fitness Calculators
Understand your body with evidence-based formulas. Calculate BMI, daily calorie needs (TDEE), macros, body-fat percentage and ideal weight, or track pregnancy milestones and fertile windows. These tools are educational and are not a substitute for medical advice.
12 free calculators
Macros Calculator
Find your target protein, carbs, and fat (IIFYM) based on your weight goals and diet style.
Ovulation Calculator
Track your menstrual cycle and predict your most fertile window and next period date.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see your weight category.
Calorie Calculator
Find your Total Daily Energy Expenditure (TDEE) based on age, weight, height, and activity level.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method with circumference measurements.
BMR Calculator
Calculate your Basal Metabolic Rate using both Mifflin-St Jeor and Harris-Benedict formulas.
Ideal Weight Calculator
Find your ideal body weight using Hamwi, Devine, Robinson, and Miller formula comparisons.
Pace Calculator
Calculate running pace, finish time, or distance for any race. Convert between min/mile and min/km.
Pregnancy Calculator
Calculate your pregnancy due date, current week, trimester, and key milestone dates from your LMP.
Pregnancy Conception Calculator
Estimate your conception date and fertile window based on your due date or last menstrual period.
Due Date Calculator
Find your pregnancy due date using LMP, conception date, or IVF transfer date methods.
Fertility & Conception Planner
Calculate your optimal window for conception, predict ovulation, and explore early pregnancy preparation.