MacroMath

About MacroMath

Free fitness calculators. No account. No nonsense.

What it is

MacroMath is a collection of free fitness calculators built on peer-reviewed formulas. All calculations happen in your browser — no account required, no personal data stored.

Formulas used

TDEE / BMRMifflin-St Jeor
BMR (alt)Harris-Benedict, Katch-McArdle
Body FatUS Navy formula
One Rep MaxEpley, Brzycki, Lombardi
PowerliftingWilks coefficients
VO2 MaxRockport, Cooper, RHR method
Ideal WeightHamwi, Devine, Robinson

Disclaimer: Results are estimates for informational purposes only. Consult a qualified health professional before making changes to your diet or training programme.