How accurate is a calorie calculator?

It is a starting estimate. Activity reporting, body composition, medications, recent dieting, tracking error and metabolic adaptation can all shift real maintenance calories.

Is BMR the minimum I should eat?

No. BMR is not a universal intake floor. Calorie targets should be judged with TDEE, health status, diet quality, body-weight trends and professional guidance when needed.

How should I adjust the result?

Track average intake and average body weight for two to four weeks, then adjust gradually if the trend does not match the goal.

Calorie Calculator

Estimate daily calorie needs from BMR, TDEE, activity level and goal, then review maintenance, weight-loss, weight-gain and macro targets.

Daily calorie needs estimate

English search intent for a calorie calculator usually expects an adult daily-calorie estimate: BMR, maintenance calories from TDEE, and goal calories for weight loss, maintenance or weight gain. This page is not a food calorie lookup or recipe calorie counter.

BMR_{m e n} = 10 W + 6.25 H - 5 A + 5, BMR_{w o m e n} = 10 W + 6.25 H - 5 A - 161

Mifflin-St Jeor equation with weight in kilograms, height in centimeters and age in years.

TDEE = BMR \times activity factor

Maintenance-calorie estimate from basal metabolic rate and activity.

Estimate, not a prescription

Predictive equations can be off for an individual. Pregnancy, lactation, diabetes, eating disorders, chronic disease, prescribed diets and very low calorie targets need professional guidance.

Goal calories and macros

target calories = TDEE + goal adjustment

Simple deficit, maintenance or surplus planning model.

P = \frac{K \times p}{4}, C = \frac{K \times c}{4}, F = \frac{K \times f}{9}

Protein and carbohydrate use 4 calories per gram; fat uses 9 calories per gram.

Output	Use it as
BMR	Resting-energy estimate, not a calorie floor.
TDEE	Starting maintenance estimate to refine with body-weight trends.
Goal calories	Planning target for loss, maintenance or gain.
Macros	Protein, carbohydrate and fat grams from the chosen calorie target.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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