Calorie Calculator
Estimate daily maintenance energy from your age, height, weight, equation parameter and activity assumption. See the resting-energy baseline alongside the activity-adjusted estimate.
Calculator arithmetic runs locally in your browser and does not require an API.
The interactive calculator loads here when JavaScript is enabled.
How to use Calorie Calculator
Enter adult measurements in the selected units; re-enter them if you switch units because existing values are not converted. Choose an activity multiplier: 1.2, 1.375, 1.55, 1.725 or 1.9. These are rough scenarios rather than measured activity.
Formula and method
Resting energy = 10W + 6.25H − 5A + s, where W is kg, H is cm, A is years and s is +5 for the male equation or −161 for the female equation. Maintenance estimate = resting energy × activity multiplier.
Understanding the results
Energy balance compares energy intake with expenditure. This model supplies an expenditure estimate, not a weight-loss target. Pregnancy, breastfeeding, illness and individual metabolism are not modeled; kcal/day means dietary kilocalories per day.
Worked example
At age 30, 70 kg and 175 cm using the male equation, resting energy is 1,648.75 kcal/day. With the 1.55 activity assumption, estimated maintenance is 2,555.56 kcal/day.
Results are estimates for general information, not a diagnosis or a substitute for professional medical advice.
References
Frequently asked questions
Is maintenance energy the same as BMR?
No. This result multiplies the resting baseline by the selected activity assumption.
Does this recommend a calorie deficit?
No. It estimates maintenance energy under simplified assumptions and does not prescribe intake.
Are activity multipliers precise measurements?
No. They are scenario factors; daily activity and actual expenditure can differ.