Health & Fitness Calculators
BMI, calorie needs, body fat, pace and other health numbers, with the method explained.
- BMI CalculatorCalculate body mass index (BMI) from height and weight in US or metric units, with the CDC adult weight category and…
- BMR CalculatorCalculate basal metabolic rate (BMR), the calories your body burns at rest, with the Mifflin-St Jeor, Harris-Benedict…
- TDEE CalculatorCalculate total daily energy expenditure (TDEE), the calories you burn in a day including activity, from BMR and an…
- Body Fat CalculatorEstimate body fat percentage with the US Navy tape-measure method from height, neck, waist and hip measurements.
- Ideal Weight CalculatorEstimate ideal body weight from height and sex using the Devine, Robinson, Miller and Hamwi formulas, plus the BMI…
- Lean Body Mass CalculatorEstimate lean body mass from height, weight and sex with the Boer, James and Hume formulas, or from a known body fat…
- Running Pace CalculatorCalculate running pace per mile or kilometer from distance and time, finish time from pace, or distance from time and…
- Race Time PredictorPredict a marathon, half marathon, 10K or 5K finish time from a recent race using Riegel’s formula.
- Heart Rate Zone CalculatorCalculate maximum heart rate and five training zones by percent of max or the Karvonen heart rate reserve method.
- One-Rep Max CalculatorEstimate your one-rep max (1RM) from a weight and reps with the Epley, Brzycki and Lombardi formulas, plus a percentage…
- Water Intake CalculatorEstimate daily water needs using the National Academies adequate intake (about 3.7 L for men and 2.7 L for women from…
- Pregnancy Due Date CalculatorEstimate your pregnancy due date from the first day of your last period and cycle length, with how far along you are…
- Pregnancy Week CalculatorFind how many weeks and days pregnant you are today from your last period, with trimester, due date and milestones.
- Ovulation CalculatorEstimate ovulation day and fertile window from your last period and cycle length, for the next three cycles.
- Protein Intake CalculatorEstimate daily protein needs from body weight and activity level, from the 0.8 g/kg RDA up to the 1.2–2.0 g/kg range…