# Milliliters to liters converter

> Convert milliliters to liters (ml to liters) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/ml-to-liters
Subject: Unit converters

Milliliter markings appear on measuring jugs and small containers. Read the volume scale, not a mass label, and identify the destination's cup or fluid-ounce convention. Kitchen measures are often approximate, so the vessel's graduations may limit the useful precision.

One millilitre is exactly 0.001 liters, so 500 mL is 0.5 L. To convert ml to liters, multiply by 0.001; to convert back, multiply by 1,000.

The litre is exactly one cubic decimetre, so 1 L is 1,000 mL and 1 mL is 1 cm³. Because both units are defined exactly, the factor above is exact and the results here carry no conversion error.

## Inputs

- **Milliliters (mL)**

## Results

- Liters (L) — main result
- Conversion
- 1 L in milliliters (mL)

## Formula

$$
\text{liters} = \text{milliliters} \times 0.001
$$

## Worked examples

### 500 mL to L

- Milliliters (mL): 500 mL
- **Liters: 0.5 L**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 330 mL to L

- Milliliters (mL): 330 mL
- **Liters: 0.33 L**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 2000 mL to L

- Milliliters (mL): 2000 mL
- **Liters: 2 L**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### When would I convert ml to liters?

Milliliter markings appear on measuring jugs and small containers. Read the volume scale, not a mass label, and identify the destination's cup or fluid-ounce convention. Kitchen measures are often approximate, so the vessel's graduations may limit the useful precision.

### How many liters are in a millilitre?

One millilitre is exactly 0.001 liters. The litre is exactly one cubic decimetre, so 1 L is 1,000 mL and 1 mL is 1 cm³.

### How do you convert ml to liters?

Multiply the number of milliliters by 0.001. For example, 500 mL × 0.001 = 0.5 L. To go the other way, divide by 0.001.

### How accurate is the milliliters to liters converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “500 mL to L” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)