# Volume Converter

Free volume converter. Convert between milliliters, liters, gallons, quarts, pints, cups, and fluid ounces with exact US liquid measure conversion factors.

## What this calculates

Convert between metric and US liquid volume units instantly. This calculator supports milliliters, liters, US gallons, quarts, pints, cups, and fluid ounces with exact conversion factors.

## Inputs

- **Value** — min 0
- **From** — options: Milliliters (mL), Liters (L), US Gallons (gal), US Quarts (qt), US Pints (pt), US Cups, US Fluid Ounces (fl oz)
- **To** — options: Milliliters (mL), Liters (L), US Gallons (gal), US Quarts (qt), US Pints (pt), US Cups, US Fluid Ounces (fl oz)

## Outputs

- **Result** — The converted volume value.
- **Conversion** — formatted as text — Step-by-step conversion explanation.

## Details

Volume conversion is essential in cooking, chemistry, medicine, and everyday life. This converter uses US liquid measures (as opposed to Imperial/UK measures, which differ slightly).

Key Conversion Factors (US Liquid)

- 1 US gallon = 3,785.411784 mL (exactly 231 cubic inches)

- 1 US gallon = 4 quarts = 8 pints = 16 cups = 128 fluid ounces

- 1 liter = 1,000 mL

- 1 US gallon ≈ 3.785 liters

- 1 US cup = 236.588 mL

- 1 US fluid ounce = 29.574 mL

US vs Imperial Measures

US and Imperial (UK) volume measures differ. A US gallon is about 3.785 liters, while an Imperial gallon is about 4.546 liters. This converter uses US measures, which are standard in American recipes and product labeling.

## Frequently Asked Questions

**Q: How many milliliters are in a US cup?**

A: One US customary cup equals exactly 236.5882365 mL. This is derived from the US gallon (231 cubic inches) divided by 16. For cooking, 240 mL is often used as a convenient approximation.

**Q: What is the difference between US and Imperial gallons?**

A: A US gallon is exactly 231 cubic inches (3,785.411784 mL), while an Imperial gallon is exactly 4,546.09 mL. The Imperial gallon is about 20% larger. This converter uses US measures.

**Q: How do I convert liters to gallons?**

A: Divide the number of liters by 3.785411784 to get US gallons. For example, 10 liters = 10 / 3.785411784 = 2.6417 US gallons. A quick approximation: divide liters by 3.8.

**Q: How many fluid ounces are in a liter?**

A: One liter contains approximately 33.814 US fluid ounces. To convert liters to fluid ounces, multiply by 33.814. To convert fluid ounces to liters, divide by 33.814.

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Source: https://vastcalc.com/calculators/conversion/volume-converter
Category: Conversion
Last updated: 2026-04-21