Conversion table
| Drops (gtt) | Milliliters (mL) |
|---|---|
| 1 gtt | 0.05 |
| 5 gtt | 0.25 |
| 10 gtt | 0.5 |
| 15 gtt | 0.75 |
| 20 gtt | 1 |
| 30 gtt | 1.5 |
| 50 gtt | 2.5 |
| 100 gtt | 5 |
How to convert Drops to mL
mL = drops ÷ 20USP medical · reverse: drops = mL × 20
- drops
- number of drops (gtt)
- mL
- result in millilitres
- 20
- drops per mL under the USP standard
A drop is not an exact unit, actual volume depends on the dropper, the liquid and technique, so use this as an estimate, not for precise dosing.
Frequently asked questions
How many drops are in 1 mL?
About 20 drops make 1 mL under the USP standard used in pharmacy. Essential-oil droppers give roughly 15–20 drops per mL.
How many mL is 10 drops?
About 0.5 mL, using 20 drops per mL. With a 60 gtt/mL microdrip set it is closer to 0.17 mL.
How many drops is 5 mL?
About 100 drops, using the 20 gtt/mL USP standard.
How many drops of essential oil are in 1 mL?
Roughly 15 to 20 drops per mL, depending on the dropper and the oil's viscosity.
Is a drop exactly 0.05 mL?
No. 0.05 mL (20 drops per mL) is the pharmacist's standard, but real drop size varies with the dropper, the liquid and how it is held.