Health & Fitness

Calculate fitness metrics, track your health, and build habits that stick, all privately in your browser.

9 tools

Calculators

  • BMI Calculator Calculate your Body Mass Index from height and weight, see your WHO category, and the healthy weight range for your height.
  • Body Fat Calculator Estimate your body fat percentage with the U.S. Navy tape-measure method, plus your fat mass and lean mass, in metric or imperial.
  • Heart Rate Zone Calculator Find your maximum heart rate and five training zones from your age, with the Karvonen method when you add a resting heart rate.
  • Ideal Weight Calculator Estimate your ideal body weight from height and sex with the Devine, Robinson, Miller, and Hamwi formulas, plus the modern BMI healthy range.
  • Macro Calculator Split a daily calorie target into grams of protein, carbs, and fat with balanced, high-protein, low-carb, or keto presets.
  • TDEE Calculator Estimate your Total Daily Energy Expenditure and the calories to eat to lose, maintain, or gain weight, using the Mifflin-St Jeor formula.

Trackers & Logs

  • Body Weight Tracker Log your weight each day and watch the trend line with a smoothed average and optional goal, all stored privately in your browser.
  • Move Today Tracker Tap once a day to log that you moved, build a streak, and watch a month of activity fill in. A dead-simple movement habit tracker.
  • Water Intake Tracker Tap to log glasses of water, hit your daily goal, and build a streak. A private hydration tracker with a weekly chart, right in your browser.