TDEE Calculator

What This Tool Does

This calculator estimates your Total Daily Energy Expenditure — the total number of calories your body burns in a day across all activities. Enter your age, sex, height, weight, and activity level, and it returns your TDEE along with adjusted calorie targets for weight loss, maintenance, or muscle gain. It gives you a more complete picture than BMR alone, because it accounts for movement and exercise on top of basic bodily functions.

You can also use this Sukanya Samriddhi Yojana Calculator.

How It's Calculated

TDEE is built from three components added together:

1. Basal Metabolic Rate (BMR): The calories your body burns at complete rest to keep vital organs functioning — heart, brain, kidneys, lungs, and so on. This is calculated first using an established equation.

2. Thermic Effect of Activity (TEA): Calories burned through deliberate exercise and physical movement. This includes both structured workouts and incidental activity — walking to work, climbing stairs, standing at a desk.

3. Thermic Effect of Food (TEF): Energy required to digest, absorb, and process food. Typically estimated at around 10% of total calorie intake, though this varies significantly by food type. Protein has a far higher thermic effect than fat or carbohydrate, which is one reason high-protein diets are often associated with slightly higher calorie burn.

Step 1 — Calculate BMR

The calculator uses the Mifflin-St Jeor Equation by default, as it is currently considered the most accurate for most adults:

• Men: BMR = 10W + 6.25H − 5A + 5
• Women: BMR = 10W + 6.25H − 5A − 161

Where W = weight in kg, H = height in cm, A = age in years.

For leaner individuals who know their body fat percentage, the Katch-McArdle Formula — BMR = 370 + 21.6 × (1 − F) × W — may be more accurate since it factors in lean body mass rather than total weight.

Step 2 — Multiply by Activity Factor

Worked Example:

Man, age 28, 175 cm, 75 kg, moderately active:

BMR = (10 × 75) + (6.25 × 175) − (5 × 28) + 5 = 750 + 1,093.75 − 140 + 5 = 1,708.75 calories

TDEE = 1,708.75 × 1.465 = ~2,503 calories/day

This is the estimated amount needed to maintain current weight at that activity level.

Using TDEE for Weight Goals

Once you have your TDEE, adjusting calorie intake relative to that number determines whether you lose, maintain, or gain weight:

For weight loss: Subtract 300–500 calories from your TDEE per day. This creates a moderate deficit that supports roughly 0.3–0.5 kg of loss per week without significantly impacting energy or muscle mass.

For weight maintenance: Eat at your TDEE. Your weight should remain stable over time.

For muscle gain: Add 200–300 calories above your TDEE per day — a controlled surplus that supports muscle growth without excessive fat gain.

Avoid cutting more than 1,000 calories below TDEE. Aggressive deficits accelerate muscle loss, suppress BMR, and are rarely sustainable.

Edge Cases and Special Rules

TDEE changes as you lose or gain weight: As your body composition shifts, your BMR changes — and therefore your TDEE does too. Recalculate every 4–6 weeks or after every 3–5 kg of weight change to keep your targets accurate.

Activity level is the most commonly misjudged input: Most people overestimate how active they are. If your weight is not responding as expected after several weeks, try dropping to a lower activity multiplier before adjusting food intake.

TDEE varies day to day: The calculator produces an average estimate. On rest days you burn fewer calories; on heavy training days you burn more. Some people find it helpful to eat at a consistent daily TDEE average rather than trying to match intake to each day's exact burn.

Thermic effect of food is not always included: Some TDEE calculators fold TEF into the activity multiplier; others calculate it separately. The difference in the final number is typically small — around 5–10% of total intake — but it explains why two calculators may produce slightly different results for the same inputs.

Medications and health conditions: Thyroid disorders, PCOS, insulin resistance, and certain medications can significantly alter actual TDEE relative to what any equation predicts. If results seem inconsistent with real-world outcomes over an extended period, consult a healthcare provider.

TDEE vs. BMR vs. Calorie Calculator

These three terms are closely related but measure different things:

BMR is the bare minimum — calories burned at complete rest with no food being digested. It is the foundation of the calculation.

TDEE builds on BMR by adding activity and food processing, giving the total calories burned in a real day. This is the number that actually matters for setting a calorie target.

A calorie calculator typically calculates TDEE and then presents adjusted targets for weight loss or gain — it is essentially a TDEE calculator with goal-setting output built on top.

In practice, BMR is a component of TDEE, and a calorie calculator is the applied version of TDEE.

Who Uses This

• People starting a weight loss plan who need a calorie baseline before setting a deficit
• Gym-goers and athletes calculating maintenance calories to fuel training and recovery without unnecessary fat gain
• Women with specific needs — TDEE shifts during pregnancy, postpartum recovery, and menopause, making recalculation important at each stage
• Anyone who has plateaued on a diet and wants to recalculate whether their targets still match their current weight and activity
• People switching from a sedentary to an active lifestyle who need to understand how much their calorie needs increase with exercise

FAQ

What is the difference between TDEE and BMR?

BMR is the calories your body needs at complete rest — no movement, no digestion. TDEE adds activity and food processing on top of that, giving the total calories your body actually uses in a full day. TDEE is always higher than BMR.

How many calories below my TDEE should I eat to lose weight?

A deficit of 300–500 calories per day is a practical and sustainable starting point. At 500 calories below TDEE, you would expect to lose approximately 0.5 kg per week. Adjust based on real results after 3–4 weeks.

Should I eat back calories burned during exercise?

If you entered an accurate activity level in the calculator, your exercise is already factored into your TDEE — you do not need to eat those calories back. Only add exercise calories back if you used a sedentary multiplier and are tracking workouts separately.

Why is my weight not changing even though I'm eating at my TDEE?

TDEE is an estimate, not a precise measurement. Inaccurate food tracking, overestimating activity level, water retention, or metabolic adaptation can all cause a discrepancy. Track consistently for 3–4 weeks before adjusting, and try lowering your activity multiplier if the deficit is not producing results.

Does TDEE change with age?

Yes. BMR tends to decline with age as muscle mass decreases, which lowers TDEE. Staying active and maintaining muscle through resistance training slows this decline significantly.

A Note on Results

TDEE estimates are based on population-level equations and the inputs you provide. Individual metabolism varies due to genetics, hormones, and other factors that no calculator can fully account for. Use your result as a starting point, track your actual weight trend over 3–4 weeks, and adjust your calorie target based on real-world outcomes rather than the calculator figure alone. For medical weight management or specific health conditions, work with a registered dietitian or your doctor.