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TDEE Calculator

Estimate daily maintenance calories from resting needs and activity.

Your numbers

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Updates as you type
Estimated daily maintenance
2,619kcal/day

Calculated from your inputs · rounded for display

Resting energy1,689.6774kcal/day
Activity multiplier1.55×

An adult population estimate, not a measured metabolic rate or dietary prescription. The equation uses biological sex coefficients; activity multipliers are rough planning assumptions. Not designed for pregnancy, breastfeeding, or clinical use.

Your calculation, step by step

No black boxes
  1. Mifflin–St Jeor: 10 × 74.842741 + 6.25 × 177.8 − 5 × 35 + 5 = 1,689.677411 kcal/day.
  2. TDEE = 1,689.677411 × 1.55 = 2,618.999986 kcal/day.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

TDEE ≈ estimated resting energy × activity factor

TDEE combines resting energy with an activity multiplier to approximate total daily energy use. These multipliers are practical assumptions rather than a direct measurement of your movement, occupation, or exercise. Selecting an overly high activity level can overstate maintenance calories. This tool does not set a weight-loss target or prescribe a diet.

A worked example

An estimated resting energy of 1,705 kcal/day multiplied by 1.55 gives about 2,643 kcal/day.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

Is this a prescribed calorie intake?

No. It is a rough maintenance estimate for adults.

Why does the activity choice matter?

The multiplier scales the entire resting estimate, so small changes can meaningfully affect the output.

Sources & methodology

Mifflin et al. (1990), original research ↗

Formula review: October 24, 2026. Read our methodology.