BMI, calories, macros, body fat, pregnancy due date, and more. Science-backed calculations, instant results.
Calculate your Body Mass Index and see where you fall on the BMI scale with health recommendations.
Find your daily calorie needs based on age, weight, height, activity level, and weight goals.
Get your ideal daily protein, carbs, and fat intake based on your goals and body composition.
Estimate your body fat percentage using the US Navy method with simple body measurements.
Calculate your estimated due date based on last menstrual period or conception date.
Find out how much water you should drink daily based on weight, activity level, and climate.
Calculate your target heart rate zones for fat burn, cardio, and peak performance training.
Find the best times to sleep or wake up based on 90-minute sleep cycles for optimal rest.
Every calculator uses established medical formulas like Mifflin-St Jeor, US Navy method, and WHO standards.
Your health data never leaves your browser. No servers, no databases, no third parties.
No sign-up, no premium tier, no hidden costs. Every tool is free forever.
All calculations run locally. Get your results the moment you click calculate.