Daily Calorie & Macro Calculator: TDEE, BMR and Macros

What this calorie calculator does

This tool estimates your resting energy burn, converts it to total daily energy expenditure, and then adjusts the number for your selected goal. It is designed as a planning estimate, not a strict prescription. The most useful result is not the first number the calculator gives you. The useful part is comparing that estimate against your real weight trend for two to three weeks and adjusting gradually.

How the estimate is built

The calculator uses the Mifflin-St Jeor equation for BMR because it is commonly used in adult energy-estimation tools. It then multiplies BMR by an activity factor to estimate TDEE. A fat-loss goal applies a moderate deficit, a maintenance goal keeps calories near TDEE, and gain goals add a controlled surplus. Protein is estimated from body weight, fat is estimated as a share of total calories, and carbohydrates fill the remaining calories.

How to use the result safely

Start with the result for two to three weeks. Weigh yourself consistently, compare weekly averages instead of single weigh-ins, and adjust in small steps. A target that is slightly imperfect but easy to follow beats an aggressive target that causes binge-restrict cycles, poor sleep, low energy, or quitting. If you have a medical condition, are pregnant, take medication, or have a history of disordered eating, use professional guidance.

Quick interpretation table

BMR	Calories your body may use at rest.
TDEE	Estimated total daily calories after normal activity.
Goal calories	TDEE adjusted for fat loss, maintenance, or gain.
Macros	Protein, carbs, and fat estimated from the calorie target.

Example result

A 30-year-old male weighing 180 lb at 70 in tall who trains several days per week may land in the mid-2,000 calorie range for maintenance. If fat loss is selected, the calculator creates a moderate deficit and increases protein emphasis to support fullness and lean-mass retention.

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Frequently asked questions

How accurate is this calorie calculator?

Calorie calculators are estimates, not measurements. The formula can give a useful starting target, but your real needs may differ because of muscle mass, job activity, sleep, medication, hormones, tracking accuracy, and normal day-to-day movement.

What is the difference between BMR and TDEE?

BMR is the estimated energy your body uses at rest. TDEE adds activity, walking, work, exercise, digestion, and daily movement. Most people use TDEE, not BMR, when setting a calorie target.

Which activity level should I choose?

Choose the option that matches a normal week, not your hardest workout day. If you sit most of the day and train a few times weekly, a light or moderate setting is usually more realistic than very active.

Should I eat exactly the number shown?

No. Treat the number as a starting target and compare it with your average body-weight trend for two to three weeks. If your trend is not matching your goal, adjust gradually instead of making extreme changes.

Is this medical advice?

No. This calculator provides general education only. People who are pregnant, under medical care, managing a condition, taking medication, or dealing with disordered eating concerns should use professional guidance.

Methodology

How this calculator was checked

BMR is estimated with the Mifflin-St Jeor equation. TDEE is estimated by multiplying BMR by an activity factor. Protein, fat, and carbohydrate grams are calculated from calorie values using four calories per gram for protein/carbohydrate and nine calories per gram for fat.

Activity levels are broad estimates, not exact measurements.
The result should be compared with real weight trends over time.
Extreme deficits are intentionally avoided because they are harder to maintain and may be unsafe.

Calculator results are estimates. Inputs are processed in the browser and are not a diagnosis, prescription, or medical instruction.

Sources

References used

Last reviewed: September 12, 2026