Health
calculators

General adult screening and planning estimates with clear limitations.

8 tools. Calculations run locally and every page explains its method.

  1. HealthBMI CalculatorCalculate adult body mass index and show the standard screening category.
  2. HealthBMR CalculatorEstimate basal metabolic rate using the Mifflin–St Jeor equation.
  3. HealthTDEE CalculatorEstimate total daily energy expenditure from BMR and activity level.
  4. HealthCalorie CalculatorEstimate maintenance and indicative weight-change calorie targets.
  5. HealthIdeal Weight CalculatorCompare several adult ideal-weight formulas as rough reference ranges.
  6. HealthBody Fat CalculatorExplore a legacy circumference-based body-fat estimate, with the exact equations and their limits.
  7. HealthMacro CalculatorSplit a daily calorie target into protein, carbohydrate, and fat grams.
  8. HealthWater Intake CalculatorExplore an illustrative fluid calculation from weight, activity and heat assumptions—not a personal drinking requirement.