Blood Volume Calculator

Estimate your total blood volume with the Nadler formula

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator estimates total blood volume using the Nadler formula, which combines height, weight, and biological sex (separate equations for men and women, since body composition differs) into a volume in liters, since blood volume can't be measured directly without specialized tracer techniques.

Anesthesiologists and surgeons use estimated blood volume to judge how much blood loss a patient can tolerate during an operation, and nursing and medical students use the same formula to learn the concept. It's an estimate for reference and education, not a substitute for a clinical measurement.

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