Blood Volume Calculator
Estimate the approximate volume of blood in the body from body weight and category (adult male, adult female, child). See the liters and milliliters, the coefficient per kilogram, and how much of your body weight is blood (about 1/13).
Input
Estimate the approximate volume of blood in the body from body weight and category. Actual blood volume varies between individuals depending on body build and composition.
Category
kg
Result
Estimated blood volume (Adult male)
4.5L
About 4,500 mL
Category
Adult male
Coefficient per kg
75 mL/kg
Share of body weight
About 1/13 (7.9%)
Estimated coefficient by category (blood per 1 kg of body weight)
| Category | Coefficient |
|---|---|
| Adult male (selected) | 75 mL/kg |
| Adult female | 65 mL/kg |
| Child / infant | 80 mL/kg |
How it works
- Estimates the approximate volume of blood in the body from body weight and category (adult male, adult female, child).
- The formulas used are adult male = weight (kg) x 75 mL, adult female = weight (kg) x 65 mL, and child = weight (kg) x 80 mL.
- Blood volume in the body is roughly 1/13 of body weight (about 7-8%) and can be approximated with a coefficient per kilogram.
- The share of body weight that is blood and the conversion to liters are also shown.
- Actual blood volume varies between individuals depending on build, body-fat percentage, and age; the values here are standard estimates.
- This tool provides estimates from general formulas and is not a diagnosis or medical advice. Always consult a doctor for health decisions.
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Blood Volume Calculator