🔥 Calorie Calculator
How It Works
Estimate daily calorie needs based on age, weight, height, gender, and activity level. Use Calorie Calculator as a general estimate from the measurements and assumptions you enter.
The result is most useful when the inputs match the definitions used by this calculator. For this tool, the underlying method is: BMR (Mifflin-St Jeor): Men = 10W + 6.25H - 5A + 5, Women = 10W + 6.25H - 5A - 161. TDEE = BMR × Activity Factor. Compare the output with the worked example, then change one meaningful input at a time to see how the result responds.
What Is Calorie?
A calorie-needs calculation estimates daily energy requirements from factors such as body measurements, age, sex, and activity assumptions. It is a starting point for understanding approximate energy needs.
How to interpret the result: Compare the output with the worked example and with another scenario using the same definitions. For this calculator, the key relationship is BMR (Mifflin-St Jeor): Men = 10W + 6.25H - 5A + 5, Women = 10W + 6.25H - 5A - 161. TDEE = BMR × Activity Factor.
How to Calculate Calorie
The page uses the method shown in the Formula section: BMR (Mifflin-St Jeor): Men = 10W + 6.25H - 5A + 5, Women = 10W + 6.25H - 5A - 161. TDEE = BMR × Activity Factor. Keep the inputs in matching units, then change one meaningful input at a time when testing scenarios.
Important limitation: Energy needs differ between people and can change over time. Interpret the estimate alongside real-world changes and health context. Review the calorie inputs and units before relying on the result.
How daily calorie needs are estimated
A calorie calculator generally estimates resting energy expenditure and then adjusts it for an assumed activity level. The result is an estimate, not a direct measurement of daily energy expenditure.
Maintenance calories vs a calorie deficit
Maintenance is an estimate of intake associated with stable weight under the model's assumptions. A deficit means eating below estimated maintenance, but the appropriate target depends on the individual and should be adjusted using real-world trends.
Why estimates differ
Body composition, activity, adaptation, measurement error, and changes in routine can make actual energy needs differ from a formula-based estimate.
When to Use This Calculator
Use Calorie Calculator as a general estimate from the measurements and assumptions you enter.
Practical tip: For this Calorie Calculator, use the result as a starting estimate and change one measurement or activity assumption at a time so you can see how sensitive the estimate is.
Formula
BMR (Mifflin-St Jeor): Men = 10W + 6.25H - 5A + 5, Women = 10W + 6.25H - 5A - 161. TDEE = BMR × Activity Factor
Example
A 30-year-old male, 175cm, 70kg, moderately active: BMR ≈ 1,650 kcal, TDEE ≈ 2,557 kcal/day. Use the calculator to test a second scenario and see how the result changes when one important assumption is adjusted.