There is no single size of drop, but pharmacists and the metric standard use 0.05 mL (20 drops per mL). Real droppers deliver 15–30 drops per mL depending on tip size and liquid, so check the label for medicines.
How to use the Drops to mL Converter
- Type the number of drops (0.05 mL) into the Drops (0.05 mL) field. Decimals such as 10 are fine.
- Read the answer in Millilitres. It updates as you type, with no button to press. The same amount is also shown in tsp, µL, US fl oz.
- To go from millilitres back to drops (0.05 mL), type into the Millilitres field instead. Every field also has a unit menu with all 27 volume units, for example L, cL, dL, m³, cm³ (cc), µL, US gal, UK gal, US dry gal.
Results update as you type, and everything is calculated in your browser.
How it works
Both units measure volume, so they are always in the same ratio: one drop (0.05 mL) equals 0.05 millilitres. The calculator multiplies the number of drops (0.05 mL) you type by 0.05 to give millilitres, and when you type into the millilitres field it divides by the same factor to give drops (0.05 mL). Because the ratio never changes, doubling the drops (0.05 mL) always doubles the millilitres, for example 40 drop is 2 mL.
How to convert drops (0.05 mL) to millilitres
- Write down the value in drops (0.05 mL), for example 20 drop.
- Multiply by the conversion factor 0.05 (because 1 drop (0.05 mL) = 0.05 mL).
- 20 × 0.05 = 1 mL.
- To go back from millilitres to drops (0.05 mL), divide by 0.05, or multiply by 20.
drop to mL conversion table
| Drops (0.05 mL) | Millilitres | Millilitres | Drops (0.05 mL) |
|---|---|---|---|
| 1 drop | 0.05 mL | 1 mL | 20 drop |
| 5 drop | 0.25 mL | 2 mL | 40 drop |
| 10 drop | 0.5 mL | 5 mL | 100 drop |
| 15 drop | 0.75 mL | 10 mL | 200 drop |
| 20 drop | 1 mL | 20 mL | 400 drop |
| 30 drop | 1.5 mL | 50 mL | 1,000 drop |
| 40 drop | 2 mL | 100 mL | 2,000 drop |
| 60 drop | 3 mL | 1,000 mL | 20,000 drop |
| 100 drop | 5 mL |
Volume units explained
- Drop (drop)
- A drop has no fixed size. The metric convention, used here, is 0.05 mL (20 drops per millilitre), but real droppers deliver about 15–30 drops per mL depending on the liquid.
- Millilitre (mL)
- A millilitre is one thousandth of a litre and exactly one cubic centimetre. Medicines, cosmetics, drinks and kitchen measures are labelled in mL.
Good to know
Use a calibrated syringe or dropper for medicine. Viscous liquids such as oils form larger drops than water.
Formula
1 drop = 0.05 mL
1 mL = 20 drops
mL = drop × 0.05
Worked example
Inputs: Drops (0.05 mL): 20 drop.
Results: Millilitres = 1 mL; Teaspoons (US) = 0.20288414 tsp; Microlitres = 1,000 µL; US fluid ounces = 0.03381402 US fl oz.
Frequently asked questions
How many drops in 1 mL?
About 20 with a standard dropper.
How many drops in a teaspoon?
About 100 (5 mL).
How many millilitres are in one drop (0.05 mL)?
1 drop = 0.05 mL.
How many drops (0.05 mL) are in one millilitre?
1 mL = 20 drops.
How do I convert drops (0.05 mL) to millilitres?
Multiply the number of drops (0.05 mL) by 0.05. For example, 20 drops × 0.05 = 1 mL.
How do I convert millilitres back to drops (0.05 mL)?
Divide by 0.05 (or multiply by 20), or simply type the value into the millilitres field above.
What is 10 drops in millilitres?
10 drops = 0.5 mL.
What is 100 drops in millilitres?
100 drops = 5 mL.
Is the drops (0.05 mL) to millilitres conversion exact?
No. A drop is a nominal 0.05 mL (20 drops per mL); real drop size varies with the dropper and the liquid, typically 15–30 drops per mL.