# Gallons to Cups Converter

URL: https://speedycalculator.com/calculators/conversion/gallons-to-cups/
Last updated: 2026-10-25

> Convert US gallons (US gal) to US cups (US cup): 1 US gallon = 16 US cup, so multiply by 16 or divide by 0.0625. Both fields are editable, so you can also type in US cups and get US gallons back.

## Inputs

- US gallons (US gal)

## Results

- US cups

## Formula

```
1 US gal = 16 US cup
1 US cup = 0.0625 US gal
US cup = US gal × 16
```

## Explanation

A U.S. gallon holds 16 cups. Handy for batch cooking, homemade lemonade or working out how many servings a gallon makes.

### How to use the Gallons to Cups Converter

- Type the number of US gallons into the **US gallons** field. Decimals such as 0.5 are fine.
- Read the answer in **US cups** – it updates as you type, with no button to press.
- To convert the other way, type into **US cups** and the US gallons are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only US gal ⇄ US cup. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.

### How it works

Both units measure volume, so they are always in the same ratio: one US gallon equals 16 US cups. The calculator multiplies the number of US gallons you type by 16 to give US cups, and when you type into the US cups field it divides by the same factor to give US gallons. Because the ratio never changes, doubling the US gallons always doubles the US cups. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

### How to convert US gallons to US cups

- Write down the value in US gallons, for example **1 US gal**.
- Multiply by the conversion factor 16 (because 1 US gallon = 16 US cup).
- 1 × 16 = **16 US cup**.
- To go back from US cups to US gallons, divide by 16 – or multiply by 0.0625.

### US gal to US cup conversion table

US gallonsUS cupsUS cupsUS gallons0.25 US gal4 US cup1 US cup0.0625 US gal0.5 US gal8 US cup2 US cup0.125 US gal1 US gal16 US cup5 US cup0.3125 US gal2 US gal32 US cup10 US cup0.625 US gal3 US gal48 US cup20 US cup1.25 US gal5 US gal80 US cup50 US cup3.125 US gal10 US gal160 US cup100 US cup6.25 US gal1,000 US cup62.5 US gal

### What is a US gallon?

The U.S. liquid gallon is exactly 231 cubic inches, about 3.785 litres. It is used for fuel, milk, water and paint in the United States.

### What is a US cup?

The U.S. customary cup is 8 U.S. fluid ounces, about 236.6 mL. Recipes from Australia, Canada and New Zealand often use the 250 mL metric cup instead.

### Common mistakes to avoid

Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.

## Worked example

Inputs — US gallons: 1 US gal.

Results — **US cups = 16 US cup**.

## FAQ

**How many cups in a gallon?**
16.

**How many 8 oz servings in a gallon?**
16.

**How many US cups are in one US gallon?**
1 US gal = 16 US cup.

**How many US gallons are in one US cup?**
1 US cup = 0.0625 US gal.

**How do I convert US gallons to US cups?**
Multiply the number of US gallons by 16. For example, 1 US gal × 16 = 16 US cup.

**How do I convert US cups back to US gallons?**
Divide by 16 (or multiply by 0.0625), or simply type the value into the US cups field above.

**What is 10 US gal in US cups?**
10 US gal = 160 US cup.

**What is 5 US gal in US cups?**
5 US gal = 80 US cup.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between US gallons and US cups. To pick any volume unit, use the general volume converter linked under Related calculators.

**What formula does the Gallons to Cups Converter use?**
1 US gal = 16 US cup.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)