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Maintenance Calorie Calculator
Estimate the calories that may keep your body weight broadly stable.
Daily energy results
Complete the form to calculate your estimate.
How to use this result
Treat the number as a starting hypothesis. Energy equations estimate resting needs, then an activity multiplier approximates movement and exercise. Record intake consistently, weigh under similar conditions and compare seven-day averages for at least two weeks. If your trend differs from the prediction, adjust the estimate gradually rather than making a large reaction to normal water-weight changes.
What the calculation includes
The standard calculation uses the Mifflin-St Jeor equation for BMR, followed by the activity factor you select. The body-fat version uses Katch-McArdle and lean body mass. The adaptive version uses observed intake and weight change. No calculator can directly measure metabolism, food absorption, spontaneous movement or training efficiency.
Finding your real maintenance range
Maintenance is better treated as a range than a single perfect number. Intake and expenditure vary from day to day, while weekly averages provide a more useful comparison.
Use the calculated number for two to four weeks, keep activity reasonably stable and compare average body weight. A stable trend suggests the estimate is close; a sustained rise or fall provides evidence for a small adjustment.
A simple validation process
- Use consistent units and an honest activity estimate.
- Follow the starting target while keeping normal movement stable.
- Compare seven-day weight averages for at least two weeks.
- Adjust gradually and record why the change was made.
The calculator is most useful as part of a feedback loop. It cannot account for every biological and behavioral variable, but consistent observations can turn a broad estimate into a practical personal range.
Maintenance Calorie Calculator FAQs
How accurate is the Maintenance Calorie Calculator?
It provides an evidence-based estimate from the information you enter. Real expenditure can differ because movement, training, body composition, sleep, health and tracking accuracy vary. Compare the estimate with a two-to-four-week weight trend.
Is this result medical advice?
No. The result is general educational information, not a diagnosis or individualized nutrition prescription. Speak with a qualified clinician or registered dietitian when health conditions, pregnancy, eating-disorder history or medication affect your needs.
How often should I recalculate?
Recalculate after a meaningful weight, activity or training change. For ordinary progress, use consistent daily weigh-ins and compare weekly averages rather than reacting to one day.
Which activity level should I choose?
Choose the lowest category that honestly reflects both structured exercise and daily movement. If uncertain, start conservatively and adjust from observed weight trends.