Calculator
Calorie Estimate Calculator
Estimate daily maintenance calories using Mifflin-St Jeor with metric or imperial body measurements.
Result
Estimated maintenance
2,327.19 calories/day
Estimated BMR
1,692.5 calories/day
How to use this calculator
What this calculator does
Estimate daily maintenance calories using Mifflin-St Jeor with metric or imperial body measurements.
How to use it
Choose your unit system, enter your body measurements, age, sex, and activity level, then review the calorie estimate.
What the result means
Use the result as a general reference point. Health estimates can vary by body composition, routine, age, and medical context.
Browse more health calculators for related estimates and comparisons.
Health results are broad educational estimates. They are not a diagnosis and should not replace advice from a qualified clinician.
Scenario guidance
When to use this
Use this when you want a starting estimate of daily maintenance calories from body measurements, age, sex, and activity level.
Example scenario
A person is preparing to discuss nutrition goals with a professional and wants a rough maintenance-calorie estimate to frame the conversation.
Inputs that usually matter most
- Weight, height, age, and sex, because they drive the base metabolic estimate.
- Activity level, which can change the result substantially.
- Consistent measurements, especially if you compare estimates over time.
Common mistake to avoid
Do not assume the estimate is your exact daily need; real energy needs vary with routine, body composition, health context, and tracking accuracy.
How to interpret the result
Use the result as a general starting point. Real maintenance calories can differ because of body composition, training load, health context, tracking accuracy, and day-to-day activity changes.
Results are general educational estimates. This calculator does not provide medical advice, nutrition treatment, or a diagnosis.
Formula
BMR is estimated with the Mifflin-St Jeor equation using metric units internally, then multiplied by the selected activity factor to estimate daily maintenance calories. It does not measure metabolism directly.
Example estimate
A moderately active 35-year-old male at 75 kg and 178 cm is estimated near 2,650 calories per day.
Frequently Asked Questions
Why is this only an estimate?
Energy needs vary with body composition, routine, health, and tracking accuracy.
Can I use this for weight loss?
It can provide a starting estimate, but nutrition changes should be personalized and adjusted over time.