Harris-Benedict BMR calculator
Result
1615kcal/day (BMR)
Multiply by activity factor for TDEE
Sedentary ×1.2, light ×1.375, moderate ×1.55, active ×1.725, very active ×1.9
How to use it
- 1
Revised Harris-Benedict (1984). Inputs: weight (kg), height (cm), age (years), sex.
- 2
Apply activity factor. BMR × activity factor = TDEE (total daily energy expenditure).
- 3
For hospitalised patients. Use Mifflin-St Jeor or indirect calorimetry — Harris-Benedict overestimates in obesity.
When to use it
- Outpatient weight management
- Establish energy intake target for weight loss (deficit 500 kcal/day = ~0.5 kg/week).
- Nutrition support
- Starting point for nasogastric/parenteral feeding prescription.
- Mifflin preferred in obesity
- Harris-Benedict ± 15% accuracy. Mifflin-St Jeor performs better in obese patients.
A reference for clinicians and students, not medical advice. A score supports a decision; it does not make one. Check every result against the patient in front of you and your local protocol.
At a glance
- Specialty
- Nutrition
- Inputs
- 4
- Type
- Formula
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