Health math, done for you.

The tools our care team uses every day — BMR, TDEE, macros, body composition, hydration, sleep, and a semaglutide planner. Evidence-based formulas. Everything runs in your browser.

Find your daily calories Try the BMI calculator

Energy & metabolism

BMR calculator

Calories burned at rest.

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TDEE calculator

Daily burn with activity.

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Calorie deficit

Fat-loss target + time to goal.

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Macro calculator

Protein, carbs, fat in grams.

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Body composition

BMI calculator

Height-to-weight screening.

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Body fat %

US Navy tape method.

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Lean body mass

Everything that isn't fat.

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Waist-to-hip

Fat distribution + risk.

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Ideal weight

4 clinical formulas + BMI bands.

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Nutrition & lifestyle

Protein calculator

Daily g target by goal.

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Water intake

Personalised hydration target.

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Intermittent fasting

16:8, 18:6, 20:4, OMAD.

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Sleep calculator

Cycle-aligned bed and wake times.

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Men's health

Semaglutide planner

Titration + loss estimate.

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ED self-assessment

Validated IIEF-5 scoring.

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Condom size guide

Find the right nominal width.

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// How they work

Peer-reviewed formulas, zero fluff.

Mifflin–St Jeor for BMR. The US Navy (Hodgdon–Beckett) method for body fat. ISSN and ACSM guidelines for protein. Published STEP trial averages for the semaglutide planner. IIEF-5 for the ED self-assessment. Every calculator cites a real source, and nothing you enter leaves your device — the math runs entirely in your browser.