Health & fitness
BMI, daily calorie needs, macros, running pace and heart-rate zones, using the formulas health agencies and research publish. Estimates for planning, not medical advice.
Pick a calculator
- BMI CalculatorBody mass index with CDC adult categories and the healthy-weight range for your height, in US or metric units.
- Body Fat CalculatorBody fat percentage from neck, waist, hip and height measurements with the U.S. Navy (Hodgdon & Beckett) equations.
- Calorie CalculatorDaily calories (TDEE) from Mifflin–St Jeor BMR × activity level, with NHLBI weight-loss targets and safety floors.
- Due Date CalculatorEstimated due date from your last period or conception date, with trimester dates and ACOG early, full and late term windows.
- Heart Rate Zone CalculatorMax heart rate by 220 − age or Tanaka, CDC moderate and vigorous target ranges, and Karvonen heart-rate-reserve targets.
- Ideal Weight CalculatorIdeal body weight by the Devine, Robinson, Miller and Hamwi equations, plus the CDC healthy BMI weight range for your height.
- Macro CalculatorProtein, carb and fat grams from your calories and percentages, checked against the National Academies AMDR ranges.
- Pace CalculatorPace per mile or km, finish time or distance for 5K, 10K, half marathon, marathon or any distance, with a splits table.
- Water Intake CalculatorDaily total water Adequate Intake from the National Academies DRIs, by age, sex, pregnancy and lactation, in liters and cups.