Health estimate only. Individual needs vary; consult a qualified professional for medical or nutrition advice.

How it works

This estimate uses the Mifflin–St Jeor equation and an activity multiplier. It is a starting estimate, not a medical prescription or diagnosis.

Standard formulaMifflin–St Jeor BMR × activity factor

Worked example

A 30-year-old person at 70 kg and 175 cm receives an estimate that changes with sex and activity selection.

What equation is used?

The calculator uses Mifflin–St Jeor with an activity multiplier.

Is this a weight-loss prescription?

No. It estimates maintenance calories and does not replace professional guidance.

Why does activity change the answer?

Daily movement affects estimated energy expenditure beyond resting needs.

Is it suitable for everyone?

It is a general adult estimate and may not suit pregnancy, illness, or special training.