---
title: "40 qt to gal = 10 gal"
description: "40 US quarts is 10 US gallons. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/40-quarts-to-gallons/
site: "At One Place"
---

# 40 qt to gal

**40 US quarts in US gallons: 40 qt = 10 gal**

gal = qt × 1/4

40 US quarts is 10 US gallons. To get there, multiply by 0.25.

## Values either side

*US quarts near 40, converted to US gallons.*

| US quarts | US gallons |
| --- | --- |
| 32 qt | 8 |
| 35 qt | 8.75 |
| 36 qt | 9 |
| 37 qt | 9.25 |
| 40 qt ← | 10 |
| 45 qt | 11.25 |
| 50 qt | 12.5 |
| 55 qt | 13.75 |
| 60 qt | 15 |

## How the conversion works

The relationship is gal = qt × 1/4. 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 40 qt in US gallons?

40 qt is 10 gal.

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

Multiply by 0.25.

## Related pages

- [US quarts to US gallons](https://atoneplace.net/convert/quarts-to-gallons/)
- [40 gal to qt](https://atoneplace.net/convert/40-gallons-to-quarts/)
- [32 qt to gal](https://atoneplace.net/convert/32-quarts-to-gallons/)
- [35 qt to gal](https://atoneplace.net/convert/35-quarts-to-gallons/)
- [36 qt to gal](https://atoneplace.net/convert/36-quarts-to-gallons/)
- [37 qt to gal](https://atoneplace.net/convert/37-quarts-to-gallons/)
- [45 qt to gal](https://atoneplace.net/convert/45-quarts-to-gallons/)
- [50 qt to gal](https://atoneplace.net/convert/50-quarts-to-gallons/)
- [55 qt to gal](https://atoneplace.net/convert/55-quarts-to-gallons/)
- [60 qt to gal](https://atoneplace.net/convert/60-quarts-to-gallons/)

## 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/)