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Health math,
done for you.

Sixteen small tools the &you team uses every day — BMI, BMR, TDEE, macros, body composition, hydration, sleep, and more. Evidence-based formulas. Everything runs in your browser.

Find your daily caloriesTry the BMI calculator

Energy & metabolism

BMR calculator→

Calories burned at rest.

TDEE calculator→

Daily burn with activity.

Calorie deficit→

Fat-loss target + time to goal.

Macro calculator→

Protein, carbs, fat in grams.

Body composition

BMI calculator→

Height-to-weight screening.

Body fat %→

US Navy tape method.

Lean body mass→

Everything that isn't fat.

Waist-to-hip→

Fat distribution + risk.

Ideal weight→

4 clinical formulas + BMI bands.

Nutrition & lifestyle

Protein calculator→

Daily g target by goal.

Water intake→

Personalised hydration target.

Intermittent fasting→

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

Sleep calculator→

Cycle-aligned bed and wake times.

Men's health

Semaglutide planner→

Titration + loss estimate.

ED self-assessment→

Validated IIEF-5 scoring.

Condom size guide→

Find the right nominal width.

How they work

Peer-reviewed formulas, zero fluff.

Mifflin–St Jeor for BMR. Hodgdon–Beckett for body fat. ISSN and ACSM guidelines for protein. STEP trial data for semaglutide. IIEF-5 for ED. Everything cites a real source. Nothing leaves your device — the calculators run entirely in your browser.