---
title: "21 mL to qt = 0.02219 qt"
description: "21 milliliters is 0.02219 US quarts. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/21-ml-to-quarts/
site: "At One Place"
---

# 21 mL to qt

**21 milliliters in US quarts: 21 mL = 0.02219 qt**

qt = mL × 0.001056688209

21 milliliters is 0.02219 US quarts. To get there, multiply by 0.001056688209.

## Values either side

*Milliliters near 21, converted to US quarts.*

| Milliliters | US quarts |
| --- | --- |
| 17 mL | 0.017964 |
| 18 mL | 0.01902 |
| 19 mL | 0.020077 |
| 20 mL | 0.021134 |
| 21 mL ← | 0.02219 |
| 22 mL | 0.023247 |
| 23 mL | 0.024304 |
| 24 mL | 0.025361 |
| 25 mL | 0.026417 |

## How the conversion works

The relationship is qt = mL × 0.001056688209. Both units measure volume, so the conversion is a fixed factor that never changes.

## Common questions

### What is 21 mL in US quarts?

21 mL is 0.02219 qt.

### How do you convert milliliters to US quarts?

Multiply by 0.001056688209.

## Related pages

- [Milliliters to US quarts](https://atoneplace.net/convert/ml-to-quarts/)
- [21 qt to mL](https://atoneplace.net/convert/21-quarts-to-ml/)
- [17 mL to qt](https://atoneplace.net/convert/17-ml-to-quarts/)
- [18 mL to qt](https://atoneplace.net/convert/18-ml-to-quarts/)
- [19 mL to qt](https://atoneplace.net/convert/19-ml-to-quarts/)
- [20 mL to qt](https://atoneplace.net/convert/20-ml-to-quarts/)
- [22 mL to qt](https://atoneplace.net/convert/22-ml-to-quarts/)
- [23 mL to qt](https://atoneplace.net/convert/23-ml-to-quarts/)
- [24 mL to qt](https://atoneplace.net/convert/24-ml-to-quarts/)
- [25 mL to qt](https://atoneplace.net/convert/25-ml-to-quarts/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)