Health & fitness calculators
Quick estimates for everyday health and fitness planning: BMI, daily calories, body fat, ideal weight, macros, water intake, running pace, heart-rate training zones and pregnancy due dates. These tools are informational only and are not medical advice.
BMI CalculatorCalculate Body Mass Index in metric or imperial units and see the WHO category.
Calorie Calculator (TDEE)Daily calorie needs from BMR and activity — for losing, keeping or gaining weight.
Body Fat CalculatorBody fat percentage with the US Navy tape-measure method.
Ideal Weight CalculatorHealthy weight range for your height, plus classic ideal-weight formulas.
Macro CalculatorSplit daily calories into grams of protein, carbs and fat.
Water Intake CalculatorA daily water target from body weight, exercise and climate.
Running Pace CalculatorPace, finish time or distance for runs — with splits and speed.
Heart Rate Zone CalculatorMax heart rate and five training zones — optionally with Karvonen.
Pregnancy Due Date CalculatorEstimated due date from last period, conception or IVF transfer.
Waist-to-Height RatioA simple health indicator: waist circumference divided by height.