---
title: "1.5 gal to m³ = 0.0056781 m³"
description: "1.5 US gallons is 0.0056781 cubic meters. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/1-5-gallons-to-cubic-meters/
site: "At One Place"
---

# 1.5 gal to m³

**1.5 US gallons in cubic meters: 1.5 gal = 0.0056781 m³**

m³ = gal × 0.003785411784

1.5 US gallons is 0.0056781 cubic meters. To get there, multiply by 0.003785411784.

## Values either side

*US gallons near 1.5, converted to cubic meters.*

| US gallons | Cubic meters |
| --- | --- |
| 0.5 gal | 0.0018927 |
| 1 gal | 0.0037854 |
| 1.5 gal ← | 0.0056781 |
| 2 gal | 0.0075708 |
| 2.5 gal | 0.0094635 |
| 3 gal | 0.011356 |
| 4 gal | 0.015142 |

## 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 1.5 gal in cubic meters?

1.5 gal is 0.0056781 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/)
- [1.5 m³ to gal](https://atoneplace.net/convert/1-5-cubic-meters-to-gallons/)
- [0.5 gal to m³](https://atoneplace.net/convert/0-5-gallons-to-cubic-meters/)
- [1 gal to m³](https://atoneplace.net/convert/1-gallons-to-cubic-meters/)
- [2 gal to m³](https://atoneplace.net/convert/2-gallons-to-cubic-meters/)
- [2.5 gal to m³](https://atoneplace.net/convert/2-5-gallons-to-cubic-meters/)
- [3 gal to m³](https://atoneplace.net/convert/3-gallons-to-cubic-meters/)
- [4 gal to m³](https://atoneplace.net/convert/4-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/)