IV Drip Rate Calculator
Drops per minute for an infusion.
Enter your values
Enter the volume in mL.
Enter the time in hours.
Choose one of: 10 gtt/mL, 15 gtt/mL, 20 gtt/mL, 60 gtt/mL (micro).
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Drip rate
- 41.7 gtt/min
- Flow rate
- 125 mL/hour
- Drops per second
- 0.69
- Seconds between drops
- 1.44
- Total minutes
- 480
Quick answer
Drip rate equals volume times the drop factor divided by infusion time in minutes.
gtt/min = (Volume × Drop factor) ÷ Minutes
At a glance
| What it does | Drops per minute for an infusion. |
|---|---|
| Category | Health |
| Inputs needed | Volume, Time, Drop factor |
| Main output | Drip rate |
| Formula | gtt/min = (Volume × Drop factor) ÷ Minutes |
| Cost | Free — no sign-up, no download |
How to use the IV Drip Rate Calculator
- 1Enter the total volume to infuse.
- 2Enter the infusion time in hours.
- 3Select the tubing drop factor.
Inputs explained
- Volume(mL)
- Enter the volume in mL.
- Time(hours)
- Enter the time in hours.
- Drop factor
- Choose one of: 10 gtt/mL, 15 gtt/mL, 20 gtt/mL, 60 gtt/mL (micro).
Worked example
Using the values the calculator loads with:
Inputs
- Volume1000 mL
- Time8 hours
- Drop factor20 gtt/mL
Results
- Drip rate41.7 gtt/min
- Flow rate125 mL/hour
- Drops per second0.69
- Seconds between drops1.44
- Total minutes480
Frequently asked questions
What is a macrodrip set?
10–20 gtt/mL tubing used for routine adult fluids.
When is microdrip used?
60 gtt/mL for paediatrics and precise low-rate infusions.
What do I need to enter into the IV Drip Rate Calculator?
Just 3 values: volume, time, drop factor. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the IV Drip Rate Calculator work out the answer?
Drip rate equals volume times the drop factor divided by infusion time in minutes. It applies the formula gtt/min = (Volume × Drop factor) ÷ Minutes and shows the working so you can check each step by hand.
Is the IV Drip Rate Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.