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.