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.
- To convert the other way, type into Millilitres and the drops (0.05 mL) are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only drop ⇄ mL. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.
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. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
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 |
What is a 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.
What is a millilitre?
A millilitre is one thousandth of a litre and exactly one cubic centimetre. Medicines, cosmetics, drinks and kitchen measures are labelled in mL.
Common mistakes to avoid
Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.
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 mL1 mL = 20 dropmL = drop × 0.05Worked example
Inputs — Drops (0.05 mL): 20 drop.
Results — Millilitres = 1 mL.
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 drop.
How do I convert drops (0.05 mL) to millilitres?
Multiply the number of drops (0.05 mL) by 0.05. For example, 20 drop × 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 drop in millilitres?
10 drop = 0.5 mL.
What is 100 drop in millilitres?
100 drop = 5 mL.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between drops (0.05 mL) and millilitres. To pick any volume unit, use the general volume converter linked under Related calculators.
What formula does the Drops to mL Converter use?
1 drop = 0.05 mL.