Estimated Blood Volume & Allowable Blood Loss

Calculate estimated blood volume and maximum allowable blood loss before transfusion.

Weight

Weight Unit

Patient Type

Optional: Allowable Blood Loss Calculation

Starting Hgb (g/dL)

Target Hgb (g/dL)

TIP

Transfusion threshold: In most stable adult patients, transfusion is considered when Hgb < 7 g/dL. Higher thresholds (8-10 g/dL) may apply for patients with cardiovascular disease. Neonates and surgical patients have institution-specific protocols.

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Unit Converter

mg, mcg, lb, kg & more

For educational purposes only. Always verify calculations with clinical references and institutional protocols.