Formulas and assumptions · August 4, 2026
Why calorie calculators give different results
Two calorie calculators can differ by hundreds of calories. Check the equation, activity factor, result type and rounding before choosing a starting point.
Start with a formula. Trust your own trend only when the data supports it.
Maintenance calories, minus false precision
Transparent calorie tools and guidance for estimating maintenance calories, checking activity assumptions and using a stable weight-and-intake trend carefully.
Formulas and assumptions · August 4, 2026
Two calorie calculators can differ by hundreds of calories. Check the equation, activity factor, result type and rounding before choosing a starting point.
Guide
Estimate maintenance calories, inspect the activity assumption and use your own data only when your weight trend is stable enough.
Formulas and assumptions · August 4, 2026
Two calorie calculators can differ by hundreds of calories. Check the equation, activity factor, result type and rounding before choosing a starting point.
Maintenance calories · August 4, 2026
Estimate maintenance calories with Mifflin-St Jeor, then check 14 to 28 days of weight and calorie data privately in your browser.