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Fifteen evidence-based calculators in one place. Big numbers, no signup, on-device math. Built the way the Health app should have been on the web.

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Your numbersAgeyrsSexWeightHeightActivity
⚡TDEE · Today
Thu, May 7
1,841kcal
77%
today
138g
Protein
207g
Carbs
51g
Fat
Age
34
Sex
F
Weight
62kg
Activity
Light
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Energy, body composition, cardio, strength, pregnancy — every metric you'd ask a clinician about, on demand.

TDEE
Daily calorie burn from BMR × activity.
1,841kcal
BMR
Energy burned at complete rest.
1,339kcal
Calorie burn
Workout calories from MET tables.
326kcal
BMI
Body mass index with categories.
22.0healthy
Body fat %
Navy circumference method.
28.8%
Ideal weight
4 formulas side-by-side.
60–64kg
Macros
Protein, carb, fat targets in grams.
138/207/51g
Protein
Daily protein need by goal.
99g
Water
Hydration target with climate.
2.2L
↗ open
Running pace
Pace, time, distance.
5:42/km
HR Zones
Karvonen 5-zone breakdown.
135–147Z2
Max HR
Tanaka, more accurate than 220−age.
184bpm
↗ open
One rep max
Epley, Brzycki, Lombardi.
82kg
↗ open
Due date
Naegele from last period.
Nov 142026
↗ open
Ovulation
Fertile window estimate.
May 18peak

Reviewed against the standard guidelines.

CDCNIH MedlinePlusACSMAmerican Heart AssociationWHO BMI categories

Every formula links to its source. Results are educational estimates and don't replace medical advice. No data leaves your browser.

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