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TDEE Calculator — Mifflin-St Jeor with Activity Multipliers

Calculate your daily calorie burn (TDEE) using the most accurate formula. See targets for cutting, maintaining and bulking.

TDEE (calories/day)

2,633

BMR: 1,699 (calories at rest)

Goal-based targets

Lose weight (-500/day)

≈ 0.5 kg / week loss

2,133

Maintain weight

Stay at current weight

2,633

Gain weight (+300/day)

≈ 0.3 kg / week gain

2,933

About this tool

Why Mifflin-St Jeor?

It's the most accurate BMR formula for the general population — more accurate than Harris-Benedict in modern studies. We multiply by your activity factor to get your TDEE (the total calories you burn in a day) and show you cut, maintain and bulk targets based on it.

How to use the TDEE / Calorie Calculator

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the TDEE / Calorie Calculator above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the TDEE / Calorie Calculator.

Is the TDEE / Calorie Calculator free to use?

Yes. The TDEE / Calorie Calculatoron 7BusyBoss is completely free — no signup, no paywall, no usage cap. We do recommend paid alternatives in a sidebar card, but the core tool stays free.

Do I need to sign up to use the TDEE / Calorie Calculator?

No. The TDEE / Calorie Calculatorworks instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the TDEE / Calorie Calculator work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the TDEE / Calorie Calculator?

Yes. The TDEE / Calorie Calculatorruns entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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