EV-T21Standalone tool

Calorie calculator

Estimate resting and total daily calorie needs with the Mifflin-St Jeor equation and explicit activity factors.

EV-T21

Estimate daily calorie needs.

Estimate resting and total daily energy with the Mifflin-St Jeor equation. This is a population-level screening estimate, not nutrition advice.

COMMON WAYS TO ASK

How many calories do I need a day?
Calculate BMR and TDEE
Maintenance calories estimate

QUICK ANSWER

What this calculator tells you.

The Mifflin-St Jeor equation estimates resting energy from weight, height, age, and sex; an explicit activity factor scales it to a daily total. Both numbers are population-level estimates, not a prescription.

WORKED EXAMPLE

5 ft 9 in, 160 lb, age 30, moderate activity

INPUT69 in · 160 lb · 30 y · male · × 1.55

RESULTAbout 1,676 kcal resting · about 2,598 kcal per day

CHECK THE EDGE CASES

Questions people ask next.

Why does the equation ask for sex?

The Mifflin-St Jeor equation was fitted with separate constants for males and females because average body composition differs. It cannot represent every body; treat the output as a starting range.

Can I use this to plan weight loss?

The tool only estimates maintenance energy. Changing intake for weight goals — especially with any medical condition, medication, or pregnancy — belongs in a conversation with a clinician or registered dietitian.