Calculate IV drip rate in drops per minute (gtts/min) and mL per hour from volume, time, and drop factor as a reference worksheet.
The IV Drip Rate Calculator converts volume, time, and drop factor into a gravity-drip rate (gtts/min) and a pump rate (mL/hr). It is a calculation worksheet for comparing the arithmetic behind an IV order, not a setup guide.
Different IV tubing sets have different drop factors. Standard (macro drip) tubing delivers 10, 15, or 20 drops per mL, while micro drip tubing delivers 60 drops per mL. The calculator keeps those assumptions visible so the result can be checked consistently.
This worksheet keeps the volume, time, and drop-factor arithmetic visible in one place so the result can be checked against a separate calculation or order entry record.
Drip Rate (gtts/min) = (Volume (mL) × Drop Factor (gtts/mL)) / Time (minutes) Pump Rate (mL/hr) = Volume (mL) / Time (hours) Drop Factor options: • Macro drip: 10 gtts/mL • Macro drip: 15 gtts/mL • Macro drip: 20 gtts/mL • Micro drip: 60 gtts/mL Shortcut for micro drip (60 gtts/mL): gtts/min = mL/hr (they are identical)
Result: 31 gtts/min | 125 mL/hr
A 1,000 mL example infused over 8 hours (480 minutes) with 15 gtts/mL tubing: (1000 × 15) / 480 = 31.25, rounded to 31 drops per minute. On a pump, the rate is 1000 / 8 = 125 mL/hr.
The worksheet shows the same arithmetic in two forms: drops per minute for gravity flow and milliliters per hour for pump equivalents. That makes it easier to compare one scenario against another without changing the underlying formula.
Different tubing sets change the number because the drop factor is part of the equation. Keeping that assumption visible matters more than the name of the fluid or the order context.
Time must be kept in the same unit throughout the calculation. Once the time, volume, and drop factor are aligned, the rest is direct arithmetic.
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This worksheet converts volume, time, and drop factor into a gravity-drip rate and a pump-rate equivalent so the arithmetic behind an IV order can be checked consistently. It is a calculation aid, not a setup or administration protocol.
The drop factor is the number of drops that equal one milliliter for a given tubing set. The calculation uses that number directly.
The worksheet can show both. Micro drip uses 60 gtts/mL, while macrodrip uses 10, 15, or 20 gtts/mL.
This calculator does not describe counting steps. It only shows the arithmetic behind the rate.
The page does not give workflow guidance. It only compares the input scenario to the calculated rate.
With 60 gtts/mL tubing, the units cancel so gtts/min and mL/hr are numerically equal.
If you enter a 10 gtts/mL assumption, the worksheet will show the corresponding math. It does not cover setup steps.