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Instant Calculation
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Estimates total blood volume using the standard Nadler equation (Nadler SB, Hidalgo JU, Bloch T. "Prediction of blood volume in normal human adults", Surgery 1962;51(2):224-232). This is a widely-published, standard reference estimation formula based on height, weight, and sex. For general reference and educational purposes only — not a medical diagnosis. Consult a doctor for actual clinical blood volume assessment.
How it works
Enter sex, height, and weight. The tool applies the sex-specific Nadler coefficients to estimate total blood volume in liters and milliliters.
- Enter sex.
- Enter height (cm).
- Enter weight (kg).
- Click Calculate to see your results.
Examples
Male, 180 cm, 70 kg
Estimated blood volume ≈ 5.0 L, using the Nadler equation for men.
Who should use it
- Estimating blood volume for surgical/anesthesia reference calculations.
- Physiology education.
Industry applications
- Anesthesiology and surgical reference
- Physiology education
Advantages
- Long-established, widely-cited standard formula.
- Feeds directly into related calculators (Allowable Blood Loss, Plasma Volume).
Limitations
- An estimate only — not an actual measured blood volume.
Common mistakes to avoid
- Entering height in the wrong unit (this tool expects centimeters).
Best practices
- Use accurate, current height and weight measurements for the best estimate.
Tips
- Use this estimate together with the Allowable Blood Loss Calculator to reference how much blood loss might be sustained before reaching a target hematocrit.