BMR Calculator
Calculate your Basal Metabolic Rate using Mifflin-St Jeor or Harris-Benedict formulas.
Personal Information
BMR Results
Your BMR
1,674kcal/day
BMI
22.7
BMI Category
Normal
Real-World Examples
See how calculations work across different profiles.
Young Adult Female
5'5" (165cm) · 130 lbs (59kg), 25 years
1,371
kcal/day BMR
Active Adult Male
5'11" (180cm) · 180 lbs (82kg), 35 years
1,802
kcal/day BMR
Older Adult Female
5'4" (163cm) · 150 lbs (68kg), 55 years
1,305
kcal/day BMR
Reference Data
| Age Range | Female (kcal/day) | Male (kcal/day) | Notes |
|---|---|---|---|
| 18–25 | 1,400 – 1,600 | 1,700 – 2,000 | Highest metabolic rate |
| 26–35 | 1,350 – 1,550 | 1,650 – 1,950 | Stable metabolism |
| 36–45 | 1,300 – 1,500 | 1,600 – 1,900 | Gradual decline begins |
| 46–55 | 1,250 – 1,450 | 1,550 – 1,850 | Perimenopause/andropause |
| 56–65 | 1,200 – 1,400 | 1,500 – 1,800 | Sarcopenia risk increases |
| 65+ | 1,150 – 1,350 | 1,450 – 1,750 | Maintaining muscle key |
Frequently Asked Questions
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Educational use only. This calculator provides estimates for educational and informational purposes. It is not medical, nutritional, or dietary advice. Consult a registered dietitian or healthcare provider for personalized guidance.
Last updated: 2026 · CalorieFig Editorial Team