BMI Calculator

BMR & TDEE Calculator

Accurate Mifflin–St Jeor formula with metric/imperial units, activity multipliers, and a live chart.

Units

Gender

Age

Weight kg

Height cm

Activity Level

Formula: Mifflin–St Jeor. Male: 10·W + 6.25·H − 5·A + 5; Female: 10·W + 6.25·H − 5·A − 161. (W in kg, H in cm, A in years)

Basal Metabolic Rate

—

kcal/day

TDEE (with selected activity)

—

kcal/day

BMI (quick reference)

—

kg/m²

Notes for accuracy: Mifflin–St Jeor is widely regarded as the most accurate equation for resting energy expenditure in healthy adults. TDEE is BMR × activity multiplier. This tool auto‑converts units precisely (1 kg = 2.20462262185 lb; 1 in = 2.54 cm).