Free Online Tool

TDEE Calculator

Calculate your maintenance calories, BMR, and personalized macro targets for weight loss, maintenance, or muscle gain — free, instant, no sign-up.

Mifflin-St Jeor Macro breakdown Imperial & Metric 100% free
Calculate Your TDEE
Fill in your details and click Calculate My TDEE to see your personalized results.
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Understanding TDEE & BMR

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What Is TDEE?

Total Daily Energy Expenditure is the total calories your body burns every 24 hours — at rest, during activity, and through digestion.

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What Is BMR?

Basal Metabolic Rate is the calories your body needs purely to sustain life — breathing, circulation, and organ function with zero movement.

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Mifflin-St Jeor Formula

The most validated BMR equation for most adults. Uses weight, height, age, and sex for accurate results.

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Activity Multipliers

Your TDEE = BMR × Activity Factor. Ranges from 1.2 (sedentary) to 1.9 (extra active).

Activity Level Reference

LevelDescriptionMultiplierExample
SedentaryLittle or no exercise× 1.2Desk job, no gym
Lightly ActiveLight exercise 1–3 days/week× 1.375Casual walks, yoga
Moderately ActiveModerate exercise 3–5 days/week× 1.55Gym 4× per week
Very ActiveHard exercise 6–7 days/week× 1.725Daily training, athlete
Extra ActiveVery hard exercise + physical job× 1.9Construction worker + gym

How to Use the TDEE Calculator

1

Choose Your Units

Select Metric or Imperial using the toggle. Values sync automatically.

2

Enter Your Stats

Fill in sex, age, height, and weight. All four fields are required.

3

Set Activity & Goal

Choose your activity level, fitness goal, and intensity.

💡 Pro Tip: Be conservative with activity level. Most people overestimate — if in doubt, go one level lower and adjust after 2–3 weeks of tracking.

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Nutrition & Fitness Tips

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Prioritise Protein

Aim for 0.7–1 g of protein per pound of body weight daily to preserve muscle during a deficit.

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Stay Hydrated

Drink at least 8–10 cups of water daily. Dehydration suppresses metabolism and impairs performance.

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Don't Skip Meals

Spreading calories across 3–5 meals helps maintain steady energy and better appetite control.

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Avoid Extreme Deficits

Cutting more than 25% below TDEE triggers muscle catabolism. Slow, steady deficits work better.

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Lift Weights

Resistance training increases lean muscle mass, which raises your BMR permanently.

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Prioritise Sleep

7–9 hours of quality sleep is as important as diet and exercise for fat loss and recovery.

Frequently Asked Questions

TDEE (Total Daily Energy Expenditure) is the total calories your body burns every day — at rest, during activity, and through digestion. It matters because eating at, above, or below your TDEE determines whether you maintain, gain, or lose weight.

BMR is the minimum calories your body needs at complete rest — no movement, no digestion. TDEE is always higher because it includes all daily activity. BMR typically represents 60–75% of TDEE.

Eat 10-20% below your TDEE. A 500 kcal/day deficit produces about 1 lb of fat loss per week. Avoid deficits above 25% to prevent muscle loss and metabolic adaptation.

Be honest and conservative. Most people overestimate their activity. If in doubt, choose the lower level and adjust after 2-3 weeks of tracking your weight.

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Privacy & security notice

This TDEE calculator runs entirely in your web browser. No data is ever transmitted, stored, or logged by our servers. All calculations are instant and completely private.