IV Therapy

Units/hr to mL/hr (Heparin, Insulin) Calculator

Pump rate for infusions ordered in units per hour.

Reviewed by Alex G, BSN, RN, CEN, CCRN, CMC, NREMT-P · From the Reference tab of the app

Turn on JavaScript to use this calculator, or open it in the web app.

Formula

Concentration (units/mL) = units in bag ÷ bag mL
mL/hr = ordered units/hr ÷ concentration

How it is used

• Heparin and insulin are high-alert drugs: a second nurse verifies the calculation and the pump program.
• Weight-based heparin protocols give a bolus in units/kg and an infusion in units/kg/hr; multiply by the weight first.

Same formula as the app. Open it in the web app.

Related one-pagers

• High-Alert Meds and InsulinHeparin: aPTT 1.5–2× control (label; exam convention 1.5–2.5×) or anti-Xa 0.3–0.7 units/mL, per protocol. Platelets fall over 50% or under 100,000, or new clots: stop heparin, evaluate for HIT.

Related calculators

• Infusion Time
• IV Pump Rate (mL/hr)
• mcg/min to mL/hr

For education and exam preparation only. Follow your institution’s protocols. For education and exam preparation only. Verify results independently and follow your institution’s protocols. Not a substitute for clinical judgment.