Daily Calorie & TDEE Calculator

Using the Mifflin-St Jeor equation and your activity level, this estimates the calories you burn in a day, then suggests targets for a gentle loss or gain. It's a general informational estimate — not medical or dietary advice — and nothing you enter is stored.

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This tool runs entirely in your browser and needs JavaScript enabled to work. The full guide, examples and FAQ below are available without it.

Sex

Age

Weight

Height

Activity level

Enter your details

This is a general informational estimate, not medical advice or a diagnosis. Individual needs vary — consult a qualified healthcare professional for guidance.

Methodology & sources

BMR uses the Mifflin-St Jeor equation: 10·kg + 6.25·cm − 5·age, then +5 for men or −161 for women. Maintenance calories = BMR × an activity factor (1.2 sedentary to 1.9 very active); loss/gain targets adjust by roughly 250–500 kcal/day.

These are population estimates — real needs vary with body composition, health and goals. For personalised advice, consult a registered dietitian or doctor.

Methodology last verified August 2026.

Read our complete guide: TDEE vs BMR: How to Calculate Your Daily Calorie Deficit for Weight Loss

Why use Daily Calorie Calculator?

Daily Calorie Calculator gives a quick, private estimate using well-established formulas — informational only, and nothing you enter is stored.

Runs instantly in your browser — nothing to install, nothing uploaded.
Completely free, with no account, no watermarks and no usage limits.
Handles BMR (Mifflin-St Jeor) = 10×kg + 6.25×cm − 5×age + (male +5 / female −161); Maintenance = BMR × activity factor.
Choose metric or US units and your sex.
Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use Daily Calorie Calculator

Choose metric or US units and your sex.
Enter your age, weight and height.
Select your activity level.
See your BMR, maintenance calories and goal targets.

Examples

Maintenance calories for a moderately active adult.
A gentle deficit for gradual weight loss.

Supported formats & limits

BMR (Mifflin-St Jeor) = 10×kg + 6.25×cm − 5×age + (male +5 / female −161)
Maintenance = BMR × activity factor

Limitations

A population estimate; individual metabolism varies.
Not medical or dietary advice — consult a professional before major changes.
Does not account for medical conditions.

Frequently asked questions

Which formula is used?

The Mifflin-St Jeor equation, widely used for estimating BMR.

Is this medical advice?

No — it is a general informational estimate. Consult a qualified professional for guidance.

Are my inputs stored?

No — everything is calculated in your browser and nothing is saved.

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From the blog

TDEE vs BMR: How to Calculate Your Daily Calorie Deficit for Weight Loss