---
title: "3 cup to gal = 0.1875 gal"
description: "3 US cups is 0.1875 US gallons. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/3-cups-to-gallons/
site: "At One Place"
---

# 3 cup to gal

**3 US cups in US gallons: 3 cup = 0.1875 gal**

gal = cup × 1/16

3 US cups is 0.1875 US gallons. To get there, multiply by 0.0625.

## Values either side

*US cups near 3, converted to US gallons.*

| US cups | US gallons |
| --- | --- |
| 1 cup | 0.0625 |
| 1.5 cup | 0.09375 |
| 2 cup | 0.125 |
| 2.5 cup | 0.15625 |
| 3 cup ← | 0.1875 |
| 4 cup | 0.25 |
| 5 cup | 0.3125 |
| 6 cup | 0.375 |
| 7 cup | 0.4375 |

## How the conversion works

The relationship is gal = cup × 1/16. 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 cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.

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

## Common questions

### What is 3 cup in US gallons?

3 cup is 0.1875 gal.

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

Multiply by 0.0625.

## Related pages

- [US cups to US gallons](https://atoneplace.net/convert/cups-to-gallons/)
- [3 gal to cup](https://atoneplace.net/convert/3-gallons-to-cups/)
- [1 cup to gal](https://atoneplace.net/convert/1-cups-to-gallons/)
- [1.5 cup to gal](https://atoneplace.net/convert/1-5-cups-to-gallons/)
- [2 cup to gal](https://atoneplace.net/convert/2-cups-to-gallons/)
- [2.5 cup to gal](https://atoneplace.net/convert/2-5-cups-to-gallons/)
- [4 cup to gal](https://atoneplace.net/convert/4-cups-to-gallons/)
- [5 cup to gal](https://atoneplace.net/convert/5-cups-to-gallons/)
- [6 cup to gal](https://atoneplace.net/convert/6-cups-to-gallons/)
- [7 cup to gal](https://atoneplace.net/convert/7-cups-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/)