Estimate your daily calorie needs based on age, gender, weight, height, and activity level.
| Age | |
| Gender | |
| Weight (kg) | |
| Height (cm) | |
| Activity Level |
How to Use the Calorie Calculator
Enter your age, sex, height, weight and activity level to estimate daily calorie needs.
Practical Example
An adult with moderate activity may receive an estimated maintenance target based on basal metabolic rate adjusted for activity.
Factors That Affect the Result
Muscle mass, training, hormones, sleep, health conditions and day-to-day activity can make actual calorie needs differ from formula estimates.
Frequently Asked Questions
Is this exact?
No. It is an estimate.
Can calorie needs change?
Yes, as body weight and activity change.
Is this medical advice?
No.
Related Tools
How to Interpret Calorie Estimates
A calorie calculator provides an estimate of daily energy needs based on the information and activity assumptions entered. Energy requirements vary between individuals and can change with body size, age, activity, training volume and other factors. If the calculator estimates maintenance calories, that number represents an approximate intake at which body weight may remain relatively stable over time, not an exact daily requirement. Short-term scale changes can also reflect water, food volume and glycogen rather than body-fat change. For practical use, treat the result as a starting point and compare it with real trends over several weeks. Avoid making large dietary changes from a single estimate. Nutrition needs can be more complex for pregnancy, medical conditions, competitive athletics or other special circumstances, where individualized professional guidance may be appropriate.
How Calorie Estimates Are Calculated
Daily calorie estimates commonly begin with an estimate of basal metabolic rate and then apply an activity factor to approximate total daily energy expenditure. These equations provide population-based estimates rather than direct measurements of an individual’s metabolism.
Why Actual Energy Needs Differ
Body composition, age, activity, training volume, pregnancy, illness, medications and other factors can affect energy needs. Activity categories are also approximate, so two people with similar inputs can have different real-world requirements.
Using the Result
Treat the result as a planning estimate rather than a medical prescription. Body-weight trends and professional guidance can provide additional context when adjusting food intake, especially for children, pregnancy, medical conditions or significant weight-change goals.