9 tools · Estimates only
Fitness Calculators
Body composition, training zones, and nutrition math that runs in your browser. Estimates only — not medical advice.
Results are estimates for personal use. Not medical, financial, tax, or legal advice.
BMI Calculator
Compute body mass index from height and weight, then see the WHO screening category. Runs locally — not a clinical assessment.
Openarrow_forwardBody Fat Calculator
Estimate body fat percentage from height and circumference measurements using the US Navy method. Private, local math — not a clinical diagnosis.
Openarrow_forwardIdeal Weight Calculator
Get a Devine-formula ideal weight estimate from height and sex. Screening math only — not a health target prescription.
Openarrow_forwardMacro Calculator
Convert a calorie target into protein, carbohydrate, and fat grams using your chosen percentages.
Openarrow_forwardProtein Intake Calculator
Multiply body weight by a grams-per-kilogram factor to estimate daily protein. Not dietary advice.
Openarrow_forwardWater Intake Calculator
Estimate daily fluid volume from body weight using a simple ml-per-kg rule of thumb.
Openarrow_forwardHeart Rate Zone Calculator
Estimate maximum heart rate and five training zones from age using the common 220 − age rule.
Openarrow_forwardSleep Cycle Calculator
Pick a wake-up time and see bedtime options based on ~90-minute cycles plus a short fall-asleep buffer.
Openarrow_forwardRunning Pace Calculator
Enter race or run distance and finish time to get average pace per kilometer and speed.
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