Blood Volume Estimator

Estimate total blood volume based on body weight, sex, and body type category. This is a rough physiology reference, not a clinical measurement.

Use your current total body weight.
Used for general blood volume per kg estimates.
Used only for a rough adjustment.
Children and infants have different typical ranges.
How we calculate

Blood volume is estimated from body weight using an approximate milliliters-per-kilogram factor. Adults often fall in a broad range around 60–75 mL/kg, while children and infants may differ.