Calculator
Daily calorie needs calculator
Estimate daily energy from BMR, activity and a custom goal adjustment. Data is processed only in your browser, and the page explains the formula and limitations of the result.
Calculator
Enter data
Equation sex, weight, height, age, activity and adjustment. Fields marked with an asterisk are required.
How to use the calculator
- Enter the required data: equation sex, weight, height, age, activity and adjustment.
- Check the values and select “Calculate”.
- Review the primary result and the detailed calculation components.
Calculation details
Formula and calculation method
BMR = 10 × weight + 6.25 × height − 5 × age + constant. TDEE = BMR × activity; target = TDEE + adjustment.
Worked example
For BMR of 1,500 kcal and activity 1.55, TDEE is 2,325 kcal; an adjustment of −300 gives an indicative 2,025 kcal target.
Limitations
- The equation is an adult estimate, not a diet or advice for pregnancy, illness or eating disorders.
Sources
Engine version: 1.0 · Last reviewed: 3 August 2026
Frequently asked questions
Is the entered data sent to a server?
No. The calculation runs locally in your browser and the values are not saved by default.
Is the result definitive?
Not always. The equation is an adult estimate, not a diet or advice for pregnancy, illness or eating disorders.