♥Health & Wellness Calculators

Alternates 3-minute fast and slow walking cycles with audio cues and session tracking.

A customisable HIIT interval timer with adjustable work and rest periods, rounds, audio cues, and a screen that stays awake.

Convert your steps into distance, time, and calories burned using your height, weight, and pace — with optional progress toward a daily step goal.

Estimate your VO2 max from a resting heart-rate, Cooper, 1.5-mile run, or Rockport walk test, with age and sex reference ranges — an educational fitness estimate.

Calculate running pace, finish time, or distance from any two values, with per-km/mile splits, race finish-time predictions, and metric or imperial units.

Estimate the calories burned during exercise and everyday activities from your weight and duration, using standard MET values — a general reference.

Estimate your one-rep max from a weight-and-reps set using Epley, Brzycki, and other formulas, with a training-percentage table — no risky max-out needed.

A fast, no-fuss rest timer for between sets — quick presets, a big one-tap countdown, set counter, audio cue, and a screen that stays awake.

Estimate your daily water intake from your body weight and activity level, in metric or imperial units, with a clear guide to how hydration needs vary.

Estimate your Total Daily Energy Expenditure from your BMR and activity level, in metric or imperial units, with a clear breakdown of how it's calculated.

Understand calorie deficits and energy balance — estimate your maintenance calories and learn how a deficit works, with clear safe-use guidance.

See how a calorie intake splits into protein, carbs, and fat using preset or custom ratios — an educational reference with a clear guide to each macronutrient.

Compare what classic formulas (Devine, Robinson, Miller, Hamwi) and the BMI healthy range suggest for your height — shown as a range of reference estimates, not a target.

Calculate your BMI in metric or imperial units, see your WHO weight category, and view the healthy-weight range for your height.

Check blood type transfusion compatibility for donors and recipients, and predict a child's possible blood types from the parents' types.

Find your five heart rate training zones from your age and max heart rate, with optional resting-HR personalisation and a clear guide to what each zone is for.

Enter a blood pressure reading you've measured to see which standard category it falls into, with clear guidance — a reference, not a diagnosis.

Measure your resting pulse and see which standard range it falls into — normal, low, or high — with age and fitness context. A reference, not a diagnosis.

Estimate your pregnancy due date from your last period (or conception/ultrasound date), with your current week, trimester, and a normal due window.

A clean Pomodoro timer — 25-minute focus sessions with short and long breaks, customizable durations, audio cues, and a screen that stays awake.

A guided breathing timer with an animated pacer for box breathing, 4-7-8, and Wim Hof–style rounds, with audio cues and a screen that stays awake.

Reflect on recent life changes with the Holmes-Rahe stress scale — tick the events from your past year to see a general stress-load score, with supportive context.