TDEE calculator — your daily calorie burn.

What is TDEE?

TDEE (total daily energy expenditure) is the total number of calories a body burns in a full 24-hour day. TDEE adds together four parts: basal metabolic rate, the thermic effect of food, exercise activity, and non-exercise activity thermogenesis (NEAT). TDEE is the single calorie figure a person eats to — eating above TDEE adds weight, eating below it removes weight.

Most people picture "calories burned" as exercise alone, but training is usually the smallest slice of TDEE. Basal metabolic rate — the energy to keep the heart, brain, and organs running at rest — accounts for roughly 60 to 70 percent of total daily energy expenditure for a typical adult. [5] The thermic effect of food, the energy spent digesting and absorbing meals, adds about 10 percent of total calorie intake. [4] Everything else — formal workouts plus all the incidental movement of a day (walking, standing, fidgeting, taking the stairs) — makes up the remainder, and that incidental movement, called NEAT, can swing daily burn by up to 2,000 calories between two people of the same size. [9]

Because basal metabolism and movement dominate, TDEE is the right anchor for any nutrition goal. A calorie target that ignores TDEE is guessing; a target built from TDEE is grounded in how the body actually spends energy — the principle of energy balance. The nutrition tracker in Nishaana logs every meal against this exact number so the deficit or surplus is real, not theoretical.

BMR vs TDEE: what is the difference?

BMR (basal metabolic rate) is the energy a body burns at complete rest to stay alive, while TDEE is BMR plus every calorie burned through digestion and movement across the day. BMR is always the smaller number; TDEE is BMR multiplied by an activity factor of 1.2 to 1.9. A person never eats at BMR to manage weight — TDEE is the figure that matters.

BMR answers a narrow question: how many calories would a body burn lying still in bed all day, doing nothing? That resting burn is real and large, but nobody actually lives at their BMR. The moment a person stands, eats, walks to the kitchen, or trains, energy expenditure climbs above BMR — and the gap between BMR and TDEE is exactly the activity multiplier. For a moderately active lifter, TDEE runs roughly 55 percent higher than BMR. If you want only the resting figure on its own, the dedicated BMR calculator isolates it.

The practical takeaway is simple: use BMR to understand the floor, but always set calorie targets from TDEE. Eating at BMR while living an active life would create a large, unintended deficit. Note too that BMR is not fixed — sustained dieting triggers adaptive thermogenesis, a real but modest drop in resting burn that the scale-check method below is designed to catch. If you only want the resting number, this calculator surfaces BMR on every result, and the activity factor does the rest.

How is TDEE calculated?

TDEE is calculated in two steps: first estimate basal metabolic rate with the Mifflin-St Jeor equation, then multiply BMR by an activity factor from 1.2 to 1.9. The formula is TDEE = BMR × activity factor. Mifflin-St Jeor is the equation researchers consider the most accurate for healthy adults, predicting resting rate within 10 percent for the most people. [1][2]

The activity factor is where most of the variance lives, so it deserves an honest answer. Pick the row that matches a typical week, not a peak week — the [6] CDC's weekly activity thresholds are a useful sanity check. Each level below maps to a multiplier the calculator applies automatically.

The activity factor is also the one number you can move on purpose. Adding a structured full-body program or a heavier compound day — the barbell back squat, conventional deadlift, and bench press are the biggest movers — raises both exercise burn and resting metabolism over time as lean mass accrues. Browse the full exercise library or a structured push/pull/legs or upper/lower split to earn a higher row honestly.

Worked example: a 30-year-old man, 178 cm and 80 kg, has a BMR of 1,768 calories (10 × 80 + 6.25 × 178 − 5 × 30 + 5). At a moderate activity factor of 1.55, his TDEE is 1,768 × 1.55 ≈ 2,740 calories per day.

How do you use TDEE to cut, maintain, or bulk?

Use TDEE as the dividing line: eat at TDEE to maintain weight, eat 15 to 20 percent below TDEE to lose fat (a caloric deficit), and eat about 10 percent above TDEE to build muscle in a lean bulk (a caloric surplus). A larger deficit is not better — aggressive cuts cost muscle and adherence. Pair every target with roughly 1.6 grams of protein per kilogram of bodyweight to protect or build lean mass. [3]

The size of the gap between intake and TDEE sets the rate of change. A deficit of about 500 calories per day yields roughly 0.45 kg (1 lb) of fat loss per week, since a kilogram of body fat stores roughly 7,700 calories. Eating at maintenance with hard training opens the door to body recomposition — losing fat and gaining muscle at once. The table below applies the deficit logic to the worked-example 2,740-calorie TDEE.

Protein is non-negotiable across every goal. A 2018 meta-analysis of 49 studies in the British Journal of Sports Medicine found that protein intakes above 1.62 grams per kilogram per day produced no further muscle gains from resistance training — making ~1.6 g/kg a sensible, evidence-based target rather than the much higher numbers often marketed. [3] The International Society of Sports Nutrition's position stand places the practical range at 1.4 to 2.0 g/kg/day for active people, with the higher end during a cut. [8] Once a calorie and protein target is set, the macro calculator turns it into daily grams of protein, carbs, and fat, and the protein calculator dials protein in on its own.

How accurate is a TDEE calculator, and how do you adjust it?

A TDEE calculator is accurate to within about 10 percent for most healthy adults, but it cannot measure individual muscle mass, NEAT, or metabolic adaptation. The reliable method is to treat the TDEE estimate as a starting point: eat at it for two to three weeks, track bodyweight, then raise or lower intake by 100 to 200 calories per day based on the actual trend on the scale.

The Mifflin-St Jeor equation earned its place because, in a landmark 2005 systematic review in the Journal of the American Dietetic Association, it predicted resting metabolic rate within 10 percent of measured values in 70 percent of non-obese adults — the best of the equations tested. [2] "Within 10 percent" is excellent for a formula, but on a 2,700-calorie TDEE it still means a possible swing of ±270 calories, and accuracy drops further for very lean, very muscular, older, or higher-BMI individuals. Independent estimators from [11] NASM and other certifying bodies use the same equation family and carry the same caveat.

That is why the scale, not the calculator, has the final say. Pick a goal, eat that target consistently for 14 to 21 days, and weigh in several mornings a week. If a "maintenance" intake is slowly adding weight, the true TDEE is lower than estimated — trim 100 to 200 calories. If a deficit is not moving the scale after three weeks, drop the same amount or add a few thousand steps. Recalculate the whole TDEE every 4 to 6 kg of weight change, since a lighter body burns fewer calories at rest and in motion; the NIH Body Weight Planner models that decline well. [7] The Nishaana tracker charts the weight trend against intake so this adjustment becomes a glance, not a spreadsheet.

What are the most common TDEE mistakes?

The most common TDEE mistakes are overstating activity level, treating the estimate as exact, forgetting to recalculate after weight change, and eating at BMR instead of TDEE. Each error pushes the calorie target off in a predictable direction, and each is easy to fix once it is named.

• Overestimating activity level. Counting a few weekly gym sessions as "very active" inflates TDEE by hundreds of calories. When unsure, pick the lower row and let the scale correct you.
• Treating TDEE as exact. The number is an estimate within ~10 percent, not a measured truth. The two-to-three-week scale check is what dials it in.
• Never recalculating. TDEE falls as bodyweight drops. A target set at 90 kg is wrong at 80 kg, which is why a once-fast cut can stall.
• Confusing BMR with TDEE. Eating at the resting number while living an active day creates an unintended, oversized deficit that wrecks energy and recovery.
• Ignoring protein. Hitting a calorie target with too little protein during a cut sheds muscle alongside fat. Anchor every plan near 1.6 g/kg. [3]
• Chasing the biggest deficit. A steeper cut is not a faster result — it raises muscle loss and the odds of quitting. A 20 percent deficit beats a 40 percent one almost every time.

TDEE questions.

What is TDEE (total daily energy expenditure)?

TDEE, or total daily energy expenditure, is the total number of calories a body burns in 24 hours. TDEE combines basal metabolic rate, the thermic effect of food (about 10 percent of intake), and every calorie spent moving — from training to walking to fidgeting. TDEE is the number a person eats to: above it the body gains, below it the body loses.

How is TDEE calculated?

TDEE is calculated by finding basal metabolic rate with the Mifflin-St Jeor equation, then multiplying BMR by an activity factor from 1.2 (sedentary) to 1.9 (extra active). For example, a 1,700-calorie BMR at moderate activity (×1.55) gives a TDEE near 2,635 calories per day. This calculator runs that math automatically from sex, age, height, and weight.

Which activity level should I choose?

Choose an activity level based on a typical week, not your best one. Sedentary means a desk job and little exercise; lightly active is one to three sessions a week; moderately active is three to five; very active is six to seven hard sessions; extra active is twice-a-day training or physical labour. Most lifters with a desk job land on lightly or moderately active.

How many calories should I eat to lose or gain weight?

Eat at TDEE to maintain weight. For fat loss, eat roughly 15 to 20 percent below TDEE; for a lean bulk, add about 10 percent above TDEE. A 20 percent deficit on a 2,600-calorie TDEE is about 2,080 calories per day. The goal table on this page does that math, and the macro calculator splits each target into grams.

How accurate is a TDEE calculator?

A TDEE calculator is a strong estimate, landing within about 10 percent of measured needs for most people, but no equation sees exact muscle mass, NEAT, or metabolism. Treat the TDEE number as a starting point, track bodyweight for two to three weeks, then adjust intake by 100 to 200 calories per day if the scale is not moving the way it should.

Does TDEE change over time?

TDEE changes whenever bodyweight, muscle mass, activity, or age changes, so a TDEE estimate is not a permanent number. Losing 10 kg lowers TDEE by roughly 100 to 200 calories per day because a smaller body burns less at rest and in motion. Recalculate TDEE every 4 to 6 kg of weight change, or whenever training volume shifts.

References

1. Mifflin MD, St Jeor ST, Hill LA, et al. A new predictive equation for resting energy expenditure in healthy individuals. American Journal of Clinical Nutrition, 1990;51(2):241–247. The original Mifflin-St Jeor study (498 healthy adults).
2. Frankenfield D, Roth-Yousey L, Compher C. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review. Journal of the American Dietetic Association, 2005;105(5):775–789. Found Mifflin-St Jeor most accurate.
3. Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine, 2018;52(6):376–384. Protein benefit plateaus near 1.62 g/kg/day.
4. Westerterp KR. Diet induced thermogenesis. Nutrition & Metabolism, 2004;1:5. Thermic effect of food ≈ 10% of intake.
5. Sabounchi N, et al. Physiology, Basal Metabolic Rate (StatPearls). NIH / NCBI Bookshelf. BMR accounts for roughly 60–70% of total daily energy expenditure.
6. Physical Activity Guidelines for Adults. Centers for Disease Control and Prevention (CDC) — defines weekly aerobic and strength thresholds.
7. NIH Body Weight Planner. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) — models how energy needs fall as weight drops.
8. Jäger R, et al. International Society of Sports Nutrition Position Stand: protein and exercise. Journal of the International Society of Sports Nutrition, 2017;14:20. Practical protein range 1.4–2.0 g/kg/day.
9. Levine JA. Nonexercise activity thermogenesis (NEAT). Best Practice & Research Clinical Endocrinology & Metabolism, 2002. NEAT can vary daily burn by up to ~2,000 kcal between individuals.
10. Calories burned in 30 minutes for people of three different weights. Harvard Health Publishing, Harvard Medical School — activity-by-bodyweight energy cost reference.
11. NASM Calorie & Energy-Needs Resource. National Academy of Sports Medicine — applies the same equation family for daily calorie estimates.
12. Calorie counting made easy. Harvard Health Publishing — practical guidance on energy balance and weight management.