The Blood Volume Estimation Calculator calculates total blood volume (TBV) to guide clinical decisions in surgery, trauma, and critical care. It accounts for age, sex, weight, and height to provide accurate estimates.
Key Formulas:
1. Nadler Formula (Most Accurate):
- Males (Adults):
Males: Blood Volume (ml) = 366.9 × (Height (m))3 +32.19 × Weight (kg) + 604.1
Males: Blood Volume (ml) = 0.006012 × (Height (in))3 +32.19 × Weight (kg) + 604.1
Males: Blood Volume (ml) = 0.0003669 × (Height (cm))3+32.19 × Weight (kg) + 604.1
- Females (Adults):
Females: Blood Volume (ml)= 356.1 × (Height (m))3 +33.08 × Weight (kg) + 183.3
Females: Blood Volume (ml)=0.005835 × (Height (in))3 +33.08 × Weight (kg) + 183.3
Females: Blood Volume (ml) = 0.0003561 × (Height (cm))3 + 33.08 × Weight (kg) + 183.3
2. Weight-Based (Simplified):
Males (Adults):
Males : Blood Volume (ml) = Weight (kg) × 70
Females (Adults):
Females: Blood Volume (ml) = Weight (kg) × 65
3. For Pediatrics
Childrens : Blood Volume (ml) = Weight (kg) × 80
Nadler Formula (Most Accurate) Calculator:
🧮 Total Blood Volume Calculator
🔍 About This Calculator:
This tool estimates total blood volume based on a person's height, weight, and category (adult male, adult female, or child). Choose your unit and enter accurate values to calculate.
Weight-Based (Simplified) Calculator:
🧮 Blood Volume Estimation Calculator
📐 Blood Volume Estimation Formula:
- Adult Male: Blood Volume (mL) = 70 × Body Weight (kg)
- Adult Female: Blood Volume (mL) = 65 × Body Weight (kg)
- Child: Blood Volume (mL) = 80 × Body Weight (kg)
How to Use the Calculator
- Select Age Group: Adult or Pediatric.
- Enter:
- Adults: Weight (kg), height (m/cm or in), and sex.
- Pediatrics: Weight (kg)
- Calculate: Instantly get blood volume in Mililiters.
Normal Blood Volume Ranges
| Group | Blood Volume |
|---|---|
| Adult Males | 70–75 mL/kg |
| Adult Females | 65–70 mL/kg |
| Infants (<1 year) | 80 mL/kg |
| Children (≥1 year) | 70 mL/kg |
Clinical Significance
- Surgery/Transfusion: Determines safe blood loss and transfusion needs.
- Trauma/Shock: Guides fluid resuscitation.
- Chemotherapy: Adjusts drug dosing.
Limitations
- Estimates vary in obesity, pregnancy, or edema.
- Nadler formula requires precise height/weight.
- Pediatric values approximate; use clinical judgment.
