IV drip rate calculator

Divide the prescribed volume by its duration for mL/hour; multiply by the actual giving-set drop factor and divide by 60 for drops/minute.

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Already-prescribed total volume (mL)

Already-prescribed duration (hours)

More inputs and assumptions

Drop factor printed on the giving set (drops/mL)

Answer

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Divide the prescribed volume by its duration for mL/hour; multiply by the actual giving-set drop factor and divide by 60 for drops/minute.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

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Formula and assumptions

For checking arithmetic from an existing order, not choosing treatment or a safe infusion rate. Example values are a practice problem. Confirm the order, fluid, actual giving set, pump settings and patient-specific limits with a qualified clinician. The drop result is unrounded; this does not choose administration rounding.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-29

Using IV drip rate calculator

Divide the prescribed volume by its duration for mL/hour; multiply by the actual giving-set drop factor and divide by 60 for drops/minute.

Next: Medication dosage calculator

Next: Unit converter

A worked example

For already-prescribed total volume (ml) = 1000, already-prescribed duration (hours) = 8, drop factor printed on the giving set (drops/ml) = 20, rate (ml/hour) = 125.

Before you use the result

Example results for already-prescribed total volume (ml)

These examples use Already-prescribed duration (hours): 8; Drop factor printed on the giving set (drops/mL): 20. They are reference calculations, not recommended settings.

Already-prescribed total volume (mL)	Rate (mL/hour)
500	62.5
1000	125
2000	250

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