Free health tools
Health calculations,
made simple.
Practical health, activity, and hydration calculators with clear context to help you use each result thoughtfully—without sign-up or complicated spreadsheets.
Calculate your BMIStart here
Health & nutrition calculators
Each tool begins with a clear question, then adds the context that makes the result more useful than a number alone.
BMI Calculator
Check your Body Mass Index, category, and healthy weight range using pounds and inches or metric units.
Use calculator 02Daily energyTDEE Calculator
Estimate your daily calorie needs, maintenance calories, and BMR from your body details and usual activity.
Use calculator 03Weight-loss planningCalorie Deficit Calculator
Turn a goal weight and adjustable weekly pace into a daily calorie target and an estimated timeframe.
Use calculator 04Walking distanceSteps to Miles Calculator
Convert any step count into estimated miles and kilometers using an editable stride length.
Use calculator 05Hydration referenceDaily Water Intake Calculator
See adult total-water and beverage reference estimates in liters, fluid ounces, and cups.
Use calculatorHow we build
Useful context, not false precision.
These tools use established formulas to produce an estimate—not a diagnosis or a complete picture of health. We show what a result means, where it has limits, and how to use it thoughtfully.