TDEE Calculator
Estimate maintenance calories and possible targets for deficit or surplus planning with a free calculator, clear formula notes, practical examples, common mistakes, FAQs and related nutrition calculators.
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What TDEE means
Total daily energy expenditure (TDEE) is an estimate of how much energy your body uses in a typical day, including resting needs and activity. This tool converts an estimated basal metabolic rate (BMR) into a maintenance-calorie estimate by applying the activity level you select.
Use this page when you want to understand the whole-day maintenance estimate and compare how the activity assumption changes it. Our Calorie Calculator uses the same underlying BMR × activity approach but presents different fixed illustrative intake comparisons. Both are estimates, not independent measurements or a reason to add their results together.
What the TDEE calculator calculates
Enter age, height in centimetres, weight in kilograms, the formula option and an activity category. The page estimates resting energy needs with the adult Mifflin–St Jeor equation and multiplies the result by the selected activity factor.
The main result is estimated maintenance calories in kcal per day. The panel also displays two arithmetic comparisons: 300 kcal below and 250 kcal above that estimated maintenance figure. Those comparison numbers are not personalised diet prescriptions; the appropriate intake varies with a person's circumstances.
The estimate covers an average day rather than the calories in a particular meal or workout. For meal-by-meal arithmetic, use the Meal Calorie Calculator.
TDEE formula and activity assumptions
TDEE (kcal/day) = estimated BMR (kcal/day) × selected activity factor. The adult Mifflin–St Jeor equations use kilograms, centimetres and years: 10 × weight + 6.25 × height − 5 × age + 5 (male formula) or − 161 (female formula).
The form offers activity multipliers of 1.2 (sedentary), 1.375 (light), 1.55 (moderate), 1.725 (very active) and 1.9 (extremely active). A single multiplier cannot capture everyone's real activity or medical circumstances. The sex selection is an equation input, not a complete description of physiology.
These equations predict rather than measure energy expenditure. The comparison figures shown beneath the result subtract 300 kcal or add 250 kcal to the maintenance estimate; they are illustrations only.
How to use the TDEE calculator
- Enter age, height in centimetres and weight in kilograms, using current measurements.
- Choose the equation option and activity level that most closely matches a typical week, rather than one unusually active day.
- Select Calculate to view the estimated daily maintenance energy requirement.
- To see the sensitivity of the estimate, change only the activity category and recalculate. Differences reflect the model assumption, not a measured change in your metabolism.
- Use the comparison figures for arithmetic context only. For an individual nutrition plan, particularly during pregnancy, breastfeeding or illness, seek professional guidance.
Worked TDEE example
For illustration, enter age 35, height 165 cm, weight 70 kg, the female equation and moderately active (1.55). Estimated BMR is 10 × 70 + 6.25 × 165 − 5 × 35 − 161 = 1,395.25 kcal/day. Multiplying by 1.55 gives an estimated TDEE of 2,163 kcal/day after rounding.
With the same age, height and weight but the lightly active multiplier (1.375), estimated maintenance falls to about 1,918 kcal/day. The 245-kcal difference comes from the multiplier selected; neither estimate is a direct measurement of daily energy use.
The displayed illustrative comparisons for the moderately active case are approximately 1,863 kcal/day (maintenance − 300) and 2,413 kcal/day (maintenance + 250). These are arithmetic examples rather than universally suitable intake targets.
How to interpret the estimate
TDEE is the estimated calories needed to maintain the same energy balance under the entered assumptions. It is not a calorie count from an exercise tracker, and a calculator cannot determine a person's exact energy needs from these inputs alone.
If you compare this figure with the Calorie Calculator, use the same age, height, weight, formula option and activity level: the maintenance estimates should be comparable. A difference in the displayed comparison targets reflects different illustrative offsets, not a disagreement about the underlying BMR formula.
Do not use the illustrative deficit or surplus as a medical or individual dietary recommendation. Consult a qualified clinician or dietitian where individual nutrition requirements matter.
Common mistakes to avoid
The biggest mistake with the TDEE Calculator is treating a clean result as a guaranteed result. Calculators are excellent at applying a formula.
- Overestimating activity level.
- Changing calories before tracking consistently.
- Ignoring weekend intake.
- Expecting the estimate to match wearable-device numbers exactly.
- Using the TDEE result without comparing it with a related calculator or a real-world trend.
- Changing the TDEE Calculator plan too quickly after one result instead of waiting for enough evidence to see a TDEE pattern.
Different body sizes, appetites, goals, training loads, food preferences, budgets, digestion, work schedules and medical needs can all change what a sensible TDEE result looks like.
Benefits and limitations
The benefit of the TDEE Calculator is speed with structure.
Benefits
- The TDEE Calculator gives a fast baseline for setting calorie targets for maintenance, fat loss, muscle gain and performance planning.
- The TDEE Calculator makes the assumptions behind TDEE easier to see.
- The TDEE Calculator helps compare multiple TDEE scenarios before committing to a plan.
- The TDEE Calculator connects naturally with related calculators in the Nutrition Calculators hub.
Limitations
- It cannot know metabolic adaptation, exact movement, food-label error or day-to-day appetite.
- It depends on the quality of age, sex, height, weight and activity level.
- The TDEE Calculator cannot replace professional advice when the TDEE result affects medical nutrition, pregnancy, digestive conditions, supplement safety or clinical diet decisions.
- The TDEE Calculator should be reviewed when your situation changes instead of being treated as a permanent TDEE answer.
The honest way to use TDEE Calculator is to combine the estimate with real evidence.
Supporting guides for this calculator
Use these related guides and comparison pages to interpret TDEE Calculator, check assumptions and move to the next useful calculator faster.
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TDEE Calculator FAQs
What does the TDEE Calculator calculate?
The TDEE Calculator estimates maintenance calories and possible targets for deficit or surplus planning from age, sex, height, weight and activity level. It is designed to give a practical planning number for meal planning, calorie targets, macros, hydration and everyday food decisions, not a guaranteed outcome.
How accurate is this result?
The result is only as accurate as the information entered and the assumptions behind the formula. Use the TDEE Calculator as a starting estimate, then compare it with real-world results and update the inputs when your situation changes.
What formula does the TDEE Calculator use?
TDEE estimates basal metabolic rate and multiplies it by an activity factor to approximate maintenance calories.
How often should I recalculate TDEE?
Recalculate when the inputs meaningfully change. For nutrition planning, a fresh TDEE estimate is more useful after a calorie target change, body-weight change, training-volume change, appetite change or several weeks of new food tracking data.
What are the biggest limitations of this calculator?
The main limitation is that the calculator cannot see context outside the fields you enter. It cannot know metabolic adaptation, exact movement, food-label error or day-to-day appetite. Treat the output as decision support, not a final verdict.
Which calculator should I use next?
After using this tool, use macro, protein and calorie deficit calculators to turn maintenance into a daily plan. The related calculator links on this page are chosen to help you check the next most relevant number.
Summary
The TDEE Calculator gives a practical estimate for total daily energy expenditure using age, sex, height, weight and activity level.
When the result affects meal planning, calorie targets, macros, hydration and everyday food decisions, compare it with related calculators, check the assumptions and update the numbers when your circumstances change.
That approach keeps the TDEE estimate useful instead of letting it become another number you calculate once and forget.
This calculator is general information only and is not dietetic or medical advice.
How to interpret your nutrition result
A nutrition calculator should be treated as a starting point, not a fixed rule. The number gives you a practical estimate based on the information entered, but your real result still depends on consistency, food choices, sleep, training, stress, medical history and how accurately you track intake. The smartest way to use this page is to take the result, follow it for two to four weeks, then adjust based on real progress rather than emotion or one unusual day.
For weight loss, a smaller sustainable change usually beats an aggressive target that only lasts a week. For muscle gain, a controlled surplus and enough protein usually work better than simply eating as much as possible. For general health, the aim is not perfection. The aim is repeatable habits: enough protein, enough fibre, reasonable portions, mostly whole foods, enough water and an intake level that matches your activity.
Why this calculator belongs in a full nutrition plan
No single calculator gives the full picture. Calories explain energy balance, protein supports recovery and lean mass, carbohydrates support training and daily movement, fats support hormones and satiety, fibre supports digestion, and hydration supports performance and appetite regulation. That is why this page links to related tools instead of pretending one number solves everything.
If your result looks higher or lower than expected, do not panic. Check your inputs first. Height, weight, activity level and goal selection can change the result heavily. It is also normal for two calculators to give slightly different answers because they use different assumptions. What matters is whether the target helps you make better decisions and whether the trend moves in the right direction over time.
Practical example
Someone trying to lose body fat might start with the calorie calculator, use the protein calculator to protect lean mass, then use the macro calculator to split the remaining calories into carbs and fats. Someone training hard might start with TDEE, set protein, then keep carbohydrates high enough to support performance. Someone focused on general health might use water, fibre, sodium and sugar tools to improve diet quality without obsessing over every calorie.
Common mistakes to avoid
- Using the most aggressive target because it looks faster.
- Forgetting that restaurant meals, oils, sauces, snacks and drinks count.
- Comparing your target to someone with a different body size, routine or goal.
- Changing the plan every few days before the trend is clear.
- Ignoring strength, energy, sleep and hunger while only watching scale weight.
Next steps
Use this result with the related calculators below, then pick one simple action for the next week. That might be preparing higher protein breakfasts, tracking meals for seven days, increasing water intake, reducing liquid calories, or planning meals before shopping. Small consistent changes beat complicated plans that are impossible to maintain.