Blood Volume (TBV) Calculator 🩸

Estimate your **Total Blood Volume** (TBV) in **Liters** and **mL/kg** using validated formulas.

1. Enter Body Metrics

Measurement System

Metric (kg/cm) US (lbs/in)

Weight (kg)

Height (cm)

Sex

Required for formula selection (Nadler's equations).

Blood Volume Estimation Report

Total Blood Volume (TBV)

Liters

Volume per Weight

mL/kg (Reference: 65 - 80)

Component Breakdown (mL)

Component	Estimated Volume (mL)	Proportion
Plasma Volume (PV)		~ 55%
Red Cell Volume (RCV)		~ 45%
Total Volume (TBV)		100%

💡 **Medical Note:** This estimate is based on average population data and should not replace direct clinical measurement.

Total Blood Volume (TBV) Calculation Formula

The estimation is based on **Nadler's Equations** for total blood volume ($\text{TBV}$) which requires height ($\text{H}$) in meters and weight ($\text{W}$) in kilograms.

For Males:

TBV (L) = (0.3669 × H³ ) + (0.03219 × W) + 0.6041

For Females:

TBV (L) = (0.3561 × H³ ) + (0.03308 × W) + 0.1833

Normal blood volume is generally **65 to 80 $\text{mL}/\text{kg}$** of body weight.