Heparin infusion rate calculator

Enter your values. The answer and the full worked solution update as you type.

Result

Pump rate14.4 mL/h

Dose per hour1440 units/h

Concentration100 units/mL

Heparin is a high-alert medication: rates are set and adjusted by the aPTT or anti-Xa nomogram of the local protocol. Round the pump rate as the question states (usually to tenths of a mL/h). For exam practice only. This is a study aid, never a clinical decision: always follow the prescription, local protocols and the product information.

Step-by-step solution

Concentration

25000/250 = 100 units/mL

Rate

18·80 = 1440 units/h

1440/100 = 14.4 mL/h

Key formulas

Concentration: units/mL = units in the bag ÷ bag volume (mL)
Dose per hour: units/h = units/kg/h × kg
Pump rate: mL/h = (units/h) ÷ (units/mL)

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