IV Push Rate Calculator
Work out how slowly to give an IV push — the millilitres and dose per 15-second interval — from the total volume, dose and the minimum push time.
How it works
mL/min = volume ÷ minutes · mL per 15 s = (mL/min) ÷ 4 · Dose/min = dose ÷ minutes
Many IV medications must be pushed no faster than a stated time to avoid adverse effects, so the safe technique is to divide the syringe volume into even amounts given against a clock. This tool converts the total volume and minimum push time into a rate per minute and, more practically, the millilitres to give every 15 seconds. It also reports the dose delivered per minute so you can compare it with the drug’s maximum rate.
Worked example
A 4 mL syringe of a drug that must go in over 2 minutes: rate = 4 ÷ 2 = 2 mL/min, or 2 ÷ 4 = 0.5 mL every 15 seconds. If the syringe holds 4 mg, that is 4 ÷ 2 = 2 mg/min.
Frequently asked questions
Why give an IV push in timed increments?
Pushing too fast can cause serious reactions for many drugs — hypotension, flushing, arrhythmias. Splitting the volume into equal amounts per 15 or 30 seconds against a watch keeps the rate within the safe limit far more reliably than pushing by feel.
How do I know the maximum safe rate?
It is stated in the drug’s administration guidance (for example “give over at least 2 minutes” or “no faster than 25 mg/min”). Enter a push time that meets that limit; compare the dose-per-minute output against any stated maximum rate.
Does dilution change the push?
Diluting increases the volume, which makes a slow push easier to control, but the safe time is still governed by the drug and dose, not the volume. Keep the total time at or above the minimum regardless of how much you dilute.
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Educational estimate only — not medical advice, and no substitute for a clinician, pharmacist or the product label. Every dose, rate and volume must be independently verified against the actual drug, order and patient before administration. Do not use this tool to self-treat or to bypass an institution’s double-check policy.