One millilitre is 1,000 microlitres. Lab pipettes are set in µL, while reagent volumes are often written in mL.
How to use the mL to µL Converter
- Type the number of millilitres into the Millilitres field. Decimals such as 0.5 are fine.
- Read the answer in Microlitres – it updates as you type, with no button to press.
- To convert the other way, type into Microlitres and the millilitres 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 mL ⇄ µL. 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 millilitre equals 1000 microlitres. The calculator multiplies the number of millilitres you type by 1000 to give microlitres, and when you type into the microlitres field it divides by the same factor to give millilitres. Because the ratio never changes, doubling the millilitres always doubles the microlitres. 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 millilitres to microlitres
- Write down the value in millilitres, for example 1 mL.
- Multiply by the conversion factor 1000 (because 1 millilitre = 1000 µL).
- 1 × 1000 = 1000 µL.
- To go back from microlitres to millilitres, divide by 1000 – or multiply by 0.001.
mL to µL conversion table
| Millilitres | Microlitres | Microlitres | Millilitres |
|---|---|---|---|
| 0.001 mL | 1 µL | 1 µL | 0.001 mL |
| 0.01 mL | 10 µL | 2 µL | 0.002 mL |
| 0.1 mL | 100 µL | 5 µL | 0.005 mL |
| 0.25 mL | 250 µL | 10 µL | 0.01 mL |
| 0.5 mL | 500 µL | 20 µL | 0.02 mL |
| 1 mL | 1000 µL | 50 µL | 0.05 mL |
| 2 mL | 2,000 µL | 100 µL | 0.1 mL |
| 5 mL | 5,000 µL | 1,000 µL | 1 mL |
| 10 mL | 10,000 µL |
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.
What is a microlitre?
A microlitre is one millionth of a litre. Lab pipettes, blood samples and reagent volumes are set in microlitres.
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.
Formula
1 mL = 1000 µL1 µL = 0.001 mLµL = mL × 1000Worked example
Inputs — Millilitres: 1 mL.
Results — Microlitres = 1,000 µL.
Frequently asked questions
How many µL in a mL?
1,000.
How many mL is 250 µL?
0.25 mL.
How do I convert millilitres to microlitres?
Multiply the number of millilitres by 1000. For example, 1 mL × 1000 = 1000 µL.
How do I convert microlitres back to millilitres?
Divide by 1000 (or multiply by 0.001), or simply type the value into the microlitres field above.
What is 10 mL in microlitres?
10 mL = 10,000 µL.
What is 5 mL in microlitres?
5 mL = 5,000 µL.
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 millilitres and microlitres. To pick any volume unit, use the general volume converter linked under Related calculators.
What formula does the mL to µL Converter use?
1 mL = 1000 µL.