TDEE calculator: Find your total daily energy expenditure

TDEE stands for total daily energy expenditure. It is the total amount of calories your body burns in a day, taking into account exercise.

Understanding your TDEE is the most important step in managing your weight. It's the baseline number you need to know whether your goal is to lose fat, gain muscle, or simply maintain your current weight.

• To lose weight: You must consistently eat fewer calories than your TDEE (a "calorie deficit").
• To maintain weight: You must eat calories at or very close to your TDEE.
• To gain weight: You must consistently eat more calories than your TDEE (a "calorie surplus").

TDEE is calculated based on three factors:

1. Basal metabolic rate (BMR): This is the energy your body uses at complete rest just to stay alive. BMR has the largest impact on your TDEE, at around 70%.
2. Activity level: This reflects the calories you burn through all movement. Structured exercise as well as everyday activities like walking, cleaning or moving around your home. It usually makes up around 20% of your total daily energy expenditure.
3. Thermic effect of food: This is the amount of energy your body uses to digest and process the food you eat. This has the smallest impact on TDEE, around 10%.

Our calculator estimates your basal metabolic rate (BMR) and then multiplies it by an "activity multiplier" that accounts for your level of activity. The thermic effect of food is not factored into this calculation, as it has a relatively small impact compared to BMR and activity level.

Your TDEE is your starting point, which is the amount of calories you need to maintain your current weight. From here, you can adjust your daily calorie intake to reach your weight goals.

For weight loss

To lose weight safely, aim to eat about 10 to 25% fewer calories than your TDEE. This would typically be 300 to 600kcal less per day for most adults.

Generally speaking, you should avoid dropping below 1,200kcal/day for women or 1,500kcal/day for men. Eating too little can slow your metabolism, increase hunger, put you at risk of nutrient deficiency and make weight loss harder to maintain.

If you’re unsure of your calorie target, try using our calorie deficit calculator to check your results based on your progress and goals.

“Think of your TDEE as your daily ‘budget’. You do not need to cut away large amounts – trimming between 300 to 600 calories below your TDEE is usually enough for safe weight loss. This approach protects your metabolism and makes it far more likely you’ll see steady progress.” – Dr Kathryn Basford, Online Doctor.

For weight gain

To gain weight you must be in a calorie surplus.

• Start with a modest surplus: Add 250-500 calories per day to your TDEE.
• Monitor your progress and adjust as needed. The goal is to gain lean mass with minimal fat gain.

For weight maintenance

If you are happy with your current weight, simply aim to eat your TDEE calories every day. Your weight may fluctuate slightly, which is normal, but your long-term average weight should remain stable.

What’s the difference between TDEE and BMR?

Basal metabolic rate is your resting energy use. This is about the calories your body burns to keep you alive when you’re not moving. It’s the calories your body uses for things like breathing, circulating blood, or regulating temperature.

Total daily energy expenditure is your total daily burn. It includes your BMR, plus the energy you use through movement and digestion. This means TDEE gives a more complete picture of how many calories you actually burn in a day, while BMR is just the starting point for that calculation.

Here’s a breakdown of the differences:

* Example values shown. Actual energy needs vary between individuals.

If your BMR is roughly 1,600 kcal/day, your TDEE could reach 2,200 to 2,400 kcal/day depending on how active you are. That’s why most calculators estimate BMR first, then apply an activity multiplier to find your TDEE.

Where does BMI fit in?

Your body mass index (BMI) measures your weight in relation to your height, while TDEE reflects your overall energy use. Together, they provide a fuller picture of your health:

• BMI shows where your weight falls on the healthy range
• TDEE helps you plan calorie goals that support weight maintenance or safe weight loss

You can check yours with our BMI calculator.

Your total daily energy expenditure (TDEE) depends on several factors, including age, sex, muscle mass, hormones, and lifestyle. Understanding these helps you interpret your TDEE calculator results and adjust your maintenance calories over time.

Age

Metabolism slows with age, often due to muscle loss and lower activity. As a result, your TDEE and maintenance calorie needs gradually decrease. A 25-year-old and a 55-year-old with the same weight can have very different TDEE results.

Sex

Men usually have a higher TDEE than women at the same height and weight because they tend to have more muscle and less body fat. This table compares TDEE calculations for women vs men at different activity levels:

Muscle mass

Muscle tissue burns energy even at rest. The more lean muscle you have, the higher your BMR and TDEE. Regular strength training can raise your maintenance calories, so your TDEE calculator results may increase as your fitness improves.

Hormones

Thyroid and reproductive hormones influence how efficiently your body uses energy. Changes during menopause or thyroid imbalance can lower TDEE. If your maintenance calorie calculator results seem lower or higher than you expected, speak with a doctor about possible hormonal factors.

Lifestyle/everyday movement

Standing, walking, housework, and manual or shift-based jobs all increase calorie burn compared with sedentary desk work. These small, frequent movements, known as non-exercise activity thermogenesis (NEAT) can add up significantly across the day.

Research shows that NEAT can vary by as much as 2,000 kcal per day between people of similar height and weight, simply due to differences in lifestyle, posture, fidgeting, and daily movement patterns. This means 2 people with similar body measurements can still have very different TDEE results depending on how active they are throughout the day.

Example: Office worker vs shift worker

This example shows how lifestyle differences can significantly affect TDEE – even in people of the same height and weight.

Emma, 35, works at a desk and exercises twice a week. Her TDEE is around 2,000 kcal/day. Sarah, 35, works in healthcare, walks around during long shifts, and trains three times a week. Her TDEE is closer to 2,600 kcal/day.

Both women might weigh the same, but their daily calorie needs differ by over 600kcal due to lifestyle and activity. This is why using your own TDEE – rather than a generic target – gives more accurate guidance for weight management.

Your TDEE is not fixed. It changes as your weight, activity level, or muscle mass changes. Recalculate your TDEE every 6 to 8 weeks, or sooner if:

• you’ve lost or gained 5% or more of your body weight
• you’ve changed jobs or activity levels (for example, started exercising regularly or switched to a desk job)
• you feel unusually tired, hungry, or your weight loss has stalled

➤ If your weight plateaus or changes unexpectedly, it may help to speak with a doctor. They can check for underlying causes like thyroid issues or metabolic changes and recommend the best next steps.

“If recalculating your TDEE is not helping and your weight remains the same despite your efforts, we recommend speaking with a healthcare professional to rule out any underlying medical issues. At ZAVA, we also offer consultations for treatments designed to safely support your weight loss journey.” – Dr Kathryn Basford, Online Doctor.

A TDEE calculator gives a useful starting point, but it cannot account for every personal factor. Differences in muscle mass, genetics, hormones, and adaptive metabolism can all affect your true calorie burn.

It’s best to use your results as a guide, then adjust your intake based on your progress over a few weeks.

Explore our other free ZAVA tools:

• BMI calculator
• BMR calculator
• Calorie deficit calculator
• Body fat calculator (coming soon)
• Protein calculator (coming soon)

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Comparative analysis of basal metabolic rate measurement methods in overweight and obese individuals, Medicine (Baltimore) [accessed 11 November 2025]

Constrained Total Energy Expenditure and Metabolic Adaptation to Physical Activity in Adult Humans, Curr Biol [accessed 11 November 2025]

No evidence for metabolic adaptation during exercise-related energy compensation, iScience [accessed 11 November 2025]

Non-Exercise Activity Thermogenesis (NEAT) in Human Energy Homeostasis, Endotext [accessed 11 November 2025]

Physical Activity Energy Expenditure and Total Daily Energy Expenditure in Successful Weight Loss Maintainers, Obesity [accessed 11 November 2025]