Volume Converter - ml, L, fl oz, Cups, Gallons and More
Enter a volume, pick your unit, and see all other units instantly with the formula shown.
Volume conversions trip people up because metric and US customary units use different base sizes, and US and UK gallons are not the same unit. This converter covers nine everyday units from milliliters to cubic meters, plus fluid ounces, cups, pints, quarts, and both US and UK gallons. Enter any value, pick your starting unit, and every other unit updates instantly with the conversion formula shown.
How to use the volume converter
- Enter the volume value you want to convert.
- Select the unit you are converting from (ml, L, m³, fl oz, cup, pt, qt, gal US, or gal UK).
- The tool shows all other units at once with the formula for each.
- Click Copy next to any result to copy it to your clipboard.
Worked examples
L to gal US: fuel economy
Enter 50 and select liter. Formula: 50 times 0.26417 equals 13.209 gal US. A 50-liter fuel tank holds about 13.2 US gallons.
fl oz to ml: recipe
Enter 8 and select fluid ounce (US). Formula: 8 times 29.574 equals 236.59 ml. One US cup of liquid is 8 fl oz, or 236.6 ml.
gal UK to L: water usage
Enter 100 and select gallon (UK). Formula: 100 times 4.5461 equals 454.61 L. A UK water bill might quote usage in gallons; 100 UK gallons is about 454.6 liters.
ml to cups: baking
Enter 500 and select milliliter. Formula: 500 times 0.0042268 equals 2.1134 cups. A 500 ml carton of cream is about 2.1 US cups.
Conversion factor reference
| From | To | Multiply by |
|---|---|---|
| L | fl oz US | 33.814 |
| fl oz US | ml | 29.574 |
| L | gal US | 0.26417 |
| gal US | L | 3.7854 |
| L | gal UK | 0.21997 |
| gal UK | L | 4.5461 |
| gal US | gal UK | 0.83267 |
| gal UK | gal US | 1.2009 |
| cup | ml | 236.59 |
| pt US | ml | 473.18 |
| qt US | L | 0.94635 |
| m³ | L | 1000 |
Common volume reference
| Unit | ml | fl oz (US) | cups / L |
|---|---|---|---|
| Teaspoon (US) | 4.929 ml | 0.1667 fl oz | 1/48 cup |
| Tablespoon (US) | 14.79 ml | 0.5 fl oz | 1/16 cup |
| 1 US cup | 236.6 ml | 8 fl oz | 0.2366 L |
| Standard can (12 fl oz) | 355 ml | 12 fl oz | 0.355 L |
| 1 US pint | 473.2 ml | 16 fl oz | 0.4732 L |
| 1 US quart | 946.4 ml | 32 fl oz | 0.9464 L |
| 1 US gallon | 3785 ml | 128 fl oz | 3.785 L |
| 1 UK gallon | 4546 ml | 160 fl oz (UK) | 4.546 L |
Frequently asked questions
How do you convert liters to gallons?
Multiply the volume in liters by 0.26417 to get US gallons, or by 0.21997 to get UK gallons. For example, 10 L times 0.26417 equals 2.6417 US gallons.
How many milliliters are in a cup?
One US cup equals 236.59 ml. This is based on 1 US fluid ounce being exactly 29.5735295625 ml and one cup containing 8 fluid ounces.
What is the difference between a US gallon and a UK gallon?
A US gallon equals 3785.4 ml (about 3.785 L). A UK imperial gallon equals 4546.1 ml (about 4.546 L). The UK gallon is about 20% larger than the US gallon.
How many fluid ounces are in a liter?
One liter equals 33.814 US fluid ounces. Conversely, 1 US fluid ounce equals exactly 29.5735295625 ml. So for a 500 ml bottle, that is about 16.9 fl oz.
How do you convert cubic meters to liters?
Multiply cubic meters by 1000 to get liters. One cubic meter equals exactly 1000 liters because 1 liter is defined as 1 cubic decimeter (0.001 m³).
How many cups are in a quart?
There are exactly 4 US cups in one US quart. A quart equals 32 US fluid ounces, and a cup equals 8 US fluid ounces. So 1 qt equals 946.35 ml.
How accurate are these volume conversions?
Results are shown to at least 5 significant figures using exact conversion factors. The US fluid ounce is defined as exactly 29.5735295625 ml; the UK gallon is defined as exactly 4546.09 ml.