If you don't know your TDEE, you are dieting blind. Use our free TDEE calculator to instantly find your Total Daily Energy Expenditure. This one critical number represents the exact amount of calories your body burns every single day. Whether your goal is to shed stubborn body fat or bulk up with lean muscle, your entire nutrition plan must be built around this biological baseline.
Your TDEE (Maintenance Calories)
0
Calories per Day
BMR (Resting Burn)
0 kcal
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How to Use This Online TDEE Calculator
Using our TDEE calculator takes less than a minute. First, input your current age, gender, height, and body weight. The tool uses these exact measurements to calculate your Basal Metabolic Rate (BMR), which is the number of calories your body burns if you stay in bed all day doing absolutely nothing.
Next, you must select your physical activity level. Be ruthlessly honest here. If you sit at a desk for 9 hours a day but go for a 20-minute walk after dinner, you are Sedentary, not Moderately Active. Overestimating your activity level will artificially inflate your TDEE and completely stall your weight loss progress.
The TDEE Formula Explained
We use the highly accurate Mifflin-St Jeor equation to calculate your TDEE. For men, the BMR formula is: (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5. For women, the formula subtracts 161 at the end instead of adding 5.
Once the engine calculates your baseline BMR, it applies an activity multiplier. A sedentary lifestyle multiplies your BMR by 1.2, while an extremely active lifestyle (like a construction worker who also lifts weights) multiplies it by 1.9. The final resulting number is your Total Daily Energy Expenditure.
TDEE Calculator Example
Let's look at a standard example. A 35-year-old female who is 5'5" and weighs 150 pounds wants to lose weight. She works an office job but does a spin class three times a week, putting her squarely in the "Lightly Active" category.
When she runs her numbers through our calculator, it shows her BMR is roughly 1,411 calories. By multiplying that BMR by her 1.375 activity multiplier, we discover her true TDEE is 1,940 calories. This means if she eats exactly 1,940 calories a day, her weight will not change. To lose one pound of fat a week, she must eat roughly 500 calories below her TDEE (targeting 1,440 calories a day).
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Tips for Managing Your TDEE in 2026
Build more muscle: Muscle tissue is metabolically active. The more muscle mass you carry on your frame, the higher your resting BMR will be, which naturally increases your total TDEE.
Increase your NEAT: Non-Exercise Activity Thermogenesis (NEAT) accounts for all the calories you burn fidgeting, walking to your car, or doing chores. Bumping your step count from 3,000 to 10,000 a day massively spikes your TDEE.
Recalculate frequently: As you lose body fat, you become a smaller human being. A smaller body requires less energy to survive. You must recalculate your TDEE every time you lose 10 pounds.
Don't drop too low: Never eat below your BMR. If your BMR is 1,500 calories, eating 1,200 calories a day will crash your metabolism and cause massive muscle loss.
Frequently Asked Questions
What is TDEE?
TDEE stands for Total Daily Energy Expenditure. It is the total number of calories your body burns in a 24-hour period, combining your resting metabolism with your physical activity.
How does a TDEE calculator work?
It calculates your Basal Metabolic Rate (BMR) using your height, weight, age, and gender, and then multiplies that number by an activity modifier to find your total caloric burn.
Is my TDEE the same as my maintenance calories?
Yes. If you consume exactly your TDEE in calories every single day, your body weight will not fluctuate. It is your baseline maintenance number.
Why is my TDEE so low?
If you are short, lightweight, older, or live a highly sedentary lifestyle (like sitting at a desk all day), your TDEE will naturally be much lower than a tall, active person.
When utilizing any of our financial, math, or health calculators, it is essential to understand that the outputs are mathematical estimates based strictly on the data you provide. While the formulas we employ are rigorously tested and aligned with industry standards, they cannot always account for every unique variable in your personal situation. For instance, in financial models, hidden fees, compound interest variations, shifting tax brackets, and local regulatory changes can all significantly impact the final numbers. Similarly, health and fitness calculations are based on generalized physiological models that may not perfectly reflect your individual metabolism or medical history. Therefore, the figures presented here should be used as a strong baseline for planning rather than a guaranteed outcome. We strongly recommend consulting with a certified public accountant (CPA), a registered financial advisor, or a licensed medical professional before making any significant life decisions based solely on these calculations. Your personal circumstances are unique, and a professional can provide the nuanced, individualized advice that a standardized algorithm simply cannot replicate.
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How to Maximize the Value of This Tool
To get the absolute best results from this calculator, accuracy in your inputs is paramount. We suggest gathering all relevant documentation before you begin to ensure the numbers you enter are precise. If you are calculating a loan or mortgage, have your official interest rate quote, your exact down payment amount, and your loan term handy. If you are using a tax or paycheck tool, pull up your most recent pay stub and last year's tax return. Small discrepancies in inputs—like being a single percentage point off on an interest rate, or estimating a slightly inaccurate local tax rate—can compound into massive mathematical errors over a long period. Additionally, we highly encourage you to run multiple scenarios. Don't just calculate your expected outcome; change the variables slightly to see how a higher interest rate, a longer payoff period, or a different salary bracket affects your final bottom line. This "stress testing" approach is exactly how professional financial analysts use data to make robust, bulletproof plans. By exploring both the best-case and worst-case scenarios, you will be much better prepared for whatever the future holds, allowing you to make confident, data-driven decisions.
Stop guessing your diet targets. Scroll back up and find your exact baseline with our free TDEE calculator today.