IV Drip Rate Calculator
mL/hr = volume ÷ hours; gtt/min = (mL × drop factor) ÷ minutes. Click any i for detail.
Infusion
Volume (mL)
i
Volume
Total infusion volume. |
|
|---|---|
Time (hours)
i
Hours
Infusion duration in hours. |
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Drop factor (gtt/mL)
i
Drop
Tubing drop factor. |
How to use this calculator
- Enter volume in mL.
- Enter time in hours.
- Choose drop factor.
- Read mL/hr and gtt/min — verify with pump policy.
Results explained
Pump rates are usually mL/hr. Manual drip sets use drops per minute from volume × drop factor ÷ minutes. Always confirm tubing calibration and facility protocol.
Quick reference: drip math
mL/hr = V/t_hr; gtt/min = (V × DF) / t_min.
| Item | Detail |
|---|---|
| Macro 10/15/20 | Common drop factors |
| Micro 60 | Often pediatric/precise |
| 8 hr × 1000 mL | 125 mL/hr |
| Round gtt/min | Whole drops in practice |
Education only — verify pump settings clinically.
How the estimate is built
mL/hr = volume/timeHr; gtt/min = volume×dropFactor/(timeHr×60).
Example scenario
1000 mL over 8 hr, DF 15 → 125 mL/hr, ~31 gtt/min.
FAQ
Minutes instead of hours?
Convert: hours = minutes/60.
Electronic pumps?
Use mL/hr primarily.
Keep-vein-open rates?
Follow order — not defaulted here.
Medication concentration?
This page is volume/time only.