# How do I convert kg to mL?

Converts kg to mL and back: mL = kg × 1,000 ÷ density (kg/L).

- Page: https://www.acalculator.org/convert/kg-to-ml
- JSON spec: https://www.acalculator.org/convert/kg-to-ml.json
- Version: 8aeafa541657

## Default answer

Example with the default inputs (Kilograms (kg) 1, Density (kg/L) 1): 1 kg = 1,000 mL.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Kilograms (kg) | The amount in kg. |
| density | Density (kg/L) | Water is 1 kg/L; milk about 1.03, olive oil about 0.91. |
| result | Milliliters (mL) | The same amount in mL. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Kilograms (kg) | The amount in kg. |
| density | Density (kg/L) | Water is 1 kg/L; milk about 1.03, olive oil about 0.91. |
| result | Milliliters (mL) | The amount in mL. |

## Method

mL = kg × 1,000 ÷ density (kg/L)

## Assumptions

- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up.

## Worked examples

1. value = 1, density = 1 gives result = 1,000. Source: NIST SP 811 (2008), Appendix B.8: 1 L = 0.001 m³.
2. value = 0.5, density = 1.25 gives result = 400. Source: NIST SP 811 (2008), Appendix B.8: 1 L = 0.001 m³.
3. value = 1, density = 0.92 gives result = 1,086.956522. Source: NIST SP 811 (2008), Appendix B.8: 1 L = 0.001 m³.

## FAQ

### How do I convert kg to mL?

Divide the kilograms by the density in kg/L, then multiply by 1,000: mL = kg × 1,000 ÷ density. 0.5 kg of a liquid at 1.25 kg/L is 0.5 × 1,000 ÷ 1.25 = 400 mL.

### How many mL is 1 kg?

1,000 mL for water, which weighs 1 kg per liter. For olive oil at about 0.91 kg/L, 1 kg is about 1,099 mL.

### Why do I need the density?

A kilogram measures weight and a milliliter measures volume. A liter of honey weighs more than a liter of oil, so the same weight fills a different volume.

### What density should I use?

Water is 1 kg/L. From USDA cup weights (kg/L = grams per cup ÷ 236.5882365): whole milk about 1.03, olive oil about 0.91, and honey about 1.43. A label or a data sheet gives the exact density of other liquids.

### Is 1 kg of water exactly 1 liter?

Almost. Pure water is 0.999975 kg/L at 4 °C and 0.998207 kg/L at 20 °C (Tanaka et al. 2001). 1 kg/L is the round value recipes and labels use.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Table 5 (SI prefixes) and Appendix B.8 (factors for units listed alphabetically), retrieved 2026-10-05. https://www.nist.gov/pml/special-publication-811
- Tanaka, M. et al. (2001), Recommended table for the density of water between 0 °C and 40 °C based on recent experimental reports, Metrologia 38, 301–309: pure water 999.9749 kg/m³ at 4 °C and 998.2067 kg/m³ at 20 °C, retrieved 2026-10-05. https://doi.org/10.1088/0026-1394/38/4/3
- USDA FoodData Central, SR Legacy portion weights for 1 cup: FDC 168894 all-purpose flour 125 g; FDC 169655 granulated sugar 200 g; FDC 168833 brown sugar, packed 220 g; FDC 169656 powdered sugar, unsifted 120 g; FDC 171265 whole milk 244 g; FDC 173410 butter 227 g; FDC 171413 olive oil 216 g; FDC 169640 honey 339 g; FDC 169756 white rice, uncooked 185 g, retrieved 2026-10-05. https://fdc.nal.usda.gov/