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Plasma Volume (Hakim Formula) Calculator

PV = (1 − Hct) · (a + b·weight_kg) — Hakim equation.

Estimate the patient's plasma volume in millilitres using the Hakim formula widely used in therapeutic plasma exchange: PV (mL) = (1 − haematocrit) · (1530 + 41 · weight_kg). Used to dose plasmapheresis volume (typically 1.0–1.5 plasma volumes).

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

kg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

PV = (1 − Hct) · (1530 + 41·weight_kg).

In depth

Estimate the patient's plasma volume in millilitres using the Hakim formula widely used in therapeutic plasma exchange: PV (mL) = (1 − haematocrit) · (1530 + 41 · weight_kg). Used to dose plasmapheresis volume (typically 1.0–1.5 plasma volumes).