Clinical TDEE Calculator

Q: What is TDEE and why does it matter?

TDEE — Total Daily Energy Expenditure — is how many calories you burn per day across rest and activity. It is the single most important number for fat loss or muscle gain: eat below it to lose weight, above it to gain. Clinarix calculates it from your age, weight, height, sex and activity level.

Q: How many calories should I eat to lose weight?

For sustainable fat loss, eat about 10–20% below your TDEE — a deficit of roughly 300–500 kcal/day yields ~0.25–0.5 kg of fat loss per week. Larger deficits risk muscle loss. Clinarix sets your cut target automatically when you choose the "Cut" goal.

Q: How accurate is a TDEE calculator?

A Mifflin–St Jeor TDEE estimate is accurate to within about ±10% for most healthy adults. Treat it as a precise starting point, then adjust by ~100 kcal if your real-world weight trend over 2–3 weeks differs from the prediction.

Q: Should I recalculate my TDEE as I lose weight?

Yes. TDEE falls as you lose weight because a lighter body burns fewer calories. Recalculate every 4–5 kg of change, or let Clinarix update it automatically from your connected profile.

Q: Is the TDEE calculator free?

Yes — every Clinarix calculator is free. Pro ($9/mo) adds unlimited longitudinal trends, AI insights and doctor-ready reports, but your TDEE result is always free.

Fuel & FastingRESULT IN KCAL / DAY

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Inputs

Biological sex

Age32 yrs

Weight78 kg

Height178 cm

Activity level×1.55

Goal

Your resultMaintain target · Energy balance

kcal / day

Macro distribution

156g

Protein

335g

Carbs

81g

Fat

BMR

1,738kcal

Maintenance

2,694kcal

BMI

24.6Healthy

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Answer · AI-extractable Reviewed

TDEE: Your Total Daily Energy Expenditure (TDEE) is the total number of calories you burn in 24 hours — resting metabolism plus daily activity. Clinarix estimates it by calculating your Basal Metabolic Rate with the Mifflin–St Jeor equation, then multiplying by an activity factor between 1.2 (sedentary) and 1.9 (athlete). To lose fat, eat ~10–20% below TDEE; to gain muscle, eat ~10–15% above.

ƒTDEE = BMR × activity factor · BMR = 10·kg + 6.25·cm − 5·age + s (s = +5 male, −161 female)

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Methodology & sources · E-E-A-T

How the TDEE works

How is TDEE calculated?

We compute Basal Metabolic Rate with the Mifflin–St Jeor equation (10·weight kg + 6.25·height cm − 5·age + sex constant), then multiply by a validated activity factor: 1.2 sedentary, 1.375 light, 1.55 moderate, 1.725 very active, 1.9 athlete. Your goal then shifts the target up or down.

How accurate is the TDEE estimate?

Sources & citations

Who should not rely on this estimate?

Medically reviewed

Dr. Lena Okafor, MD — Endocrinology

Last reviewed Feb 2026 · Meet the board →

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Premium · longitudinal trends

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Clinical TDEE Calculator

Inputs

Your result unlocks these next

How the TDEE works

How is TDEE calculated?

How accurate is the TDEE estimate?

Sources & citations

Who should not rely on this estimate?

This calculator is part of Clinarix Pro

Frequently asked questions

What is TDEE and why does it matter?

How many calories should I eat to lose weight?

How accurate is a TDEE calculator?

Should I recalculate my TDEE as I lose weight?

Is the TDEE calculator free?