---
title: "20 gal to m³ = 0.075708 m³"
description: "20 US gallons is 0.075708 cubic meters. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/20-gallons-to-cubic-meters/
site: "At One Place"
---

# 20 gal to m³

**20 US gallons in cubic meters: 20 gal = 0.075708 m³**

m³ = gal × 0.003785411784

20 US gallons is 0.075708 cubic meters. To get there, multiply by 0.003785411784.

## Values either side

*US gallons near 20, converted to cubic meters.*

| US gallons | Cubic meters |
| --- | --- |
| 16 gal | 0.060567 |
| 17 gal | 0.064352 |
| 18 gal | 0.068137 |
| 19 gal | 0.071923 |
| 20 gal ← | 0.075708 |
| 21 gal | 0.079494 |
| 22 gal | 0.083279 |
| 23 gal | 0.087064 |
| 24 gal | 0.09085 |

## How the conversion works

The relationship is m³ = gal × 0.003785411784. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> US gallon: US liquid gallon. The imperial gallon is about 20% larger.

## Common questions

### What is 20 gal in cubic meters?

20 gal is 0.075708 m³.

### How do you convert US gallons to cubic meters?

Multiply by 0.003785411784.

## Related pages

- [US gallons to cubic meters](https://atoneplace.net/convert/gallons-to-cubic-meters/)
- [20 m³ to gal](https://atoneplace.net/convert/20-cubic-meters-to-gallons/)
- [16 gal to m³](https://atoneplace.net/convert/16-gallons-to-cubic-meters/)
- [17 gal to m³](https://atoneplace.net/convert/17-gallons-to-cubic-meters/)
- [18 gal to m³](https://atoneplace.net/convert/18-gallons-to-cubic-meters/)
- [19 gal to m³](https://atoneplace.net/convert/19-gallons-to-cubic-meters/)
- [21 gal to m³](https://atoneplace.net/convert/21-gallons-to-cubic-meters/)
- [22 gal to m³](https://atoneplace.net/convert/22-gallons-to-cubic-meters/)
- [23 gal to m³](https://atoneplace.net/convert/23-gallons-to-cubic-meters/)
- [24 gal to m³](https://atoneplace.net/convert/24-gallons-to-cubic-meters/)

## 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/)