Question
How many calories do I need per day?
Daily calorie needs depend on age, body size, sex, and activity level. A calorie calculator gives a useful estimate to start from.
Fitness
Use OmniCalc's calorie calculator to estimate daily calorie needs for maintenance, weight loss, or weight gain goals.
Calorie calculator
Get a maintenance estimate, then compare a lighter or stronger adjustment for weight loss or weight gain.
Why this result matters
Practical daily calorie estimate tied to goals. Use the tool above to enter a few clear inputs and get a practical answer you can use right away.
Formula and method
Calorie estimates usually combine a basal metabolic estimate with an activity multiplier, then adjust the result depending on the user's goal.
Example
This calculator helps someone compare a maintenance target with a more practical loss or gain target before planning meals.
FAQ
Short answers to the questions people often ask before or after using the tool.
Question
Daily calorie needs depend on age, body size, sex, and activity level. A calorie calculator gives a useful estimate to start from.
Question
Maintenance calories are usually estimated by calculating baseline energy needs and then adjusting for activity level.
Question
People often aim below their estimated maintenance level, but the right target depends on the pace of change and personal circumstances.
Related calculators
If the next question is close to this one, these are the best pages to open next.
Fitness
Use OmniCalc's BMI calculator to quickly estimate body mass index from your height and weight and understand the result clearly.
Education
Use OmniCalc's GPA calculator to quickly estimate grade point average for school, college, or university coursework.
Daily utilities
Use OmniCalc's age calculator to quickly find exact age in years, months, and days from a date of birth.