Volume Converter
This volume converter changes between milliliters, liters, teaspoons, tablespoons, fluid ounces, cups, pints, quarts, and gallons, all at once. Type a value in any unit and the rest update live, so ml to oz, cups to ml, or liters to gallons takes one entry. It's built for cooking and everyday use, with a conversion chart and a grams-to-cups guide below.
- ml, cups, fl oz
- Liters & gallons
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- Cooking chart
- Grams to cups
Last updated June 17, 2026 1 cup = 236.6 ml (US) Reviewed by the Calcowa team
US customary units. Type any value and every unit updates live.
1 cup × 236.59 = 236.59 ml
How do you convert ml to oz?
To convert milliliters to fluid ounces, divide by 29.5735, since one US fluid ounce is 29.5735 ml. So 100 ml is 3.38 fl oz, 250 ml is 8.45 fl oz, and 500 ml is 16.9 fl oz. To go from fluid ounces to ml, multiply by 29.5735 instead. One thing to watch: this is the fluid ounce, a volume, not the dry ounce that measures weight. They share a name but they're different, so you can't swap them.
How many ml are in a cup?
A US cup is 236.6 ml. Within it, there are 8 fluid ounces, 16 tablespoons, and 48 teaspoons, so half a cup is 118 ml and a quarter cup is 59 ml. Watch out for the metric cup, used in Australia and parts of Europe, which is 250 ml, slightly larger. This converter uses US customary units, the standard in American recipes, so if a recipe is written in metric, you'll work from the ml directly. Type 1 cup above and you'll see every unit at once.
How do you convert liters to gallons?
Divide the liters by 3.785, because one US gallon is 3.785 liters. So 5 liters is 1.32 gallons, and 10 liters is 2.64 gallons. Multiply the other way to turn gallons into liters. Here's the catch worth knowing: the UK imperial gallon is bigger, about 4.546 liters, so a US gallon and a UK gallon aren't the same thing. This converter uses the US gallon, which is what you'll want for American recipes, fuel, and most day-to-day needs.
Grams to cups: why it depends on the ingredient
Grams measure weight and cups measure volume, so there's no single factor between them; it depends on how dense the ingredient is. A cup of water weighs 237 g, but a cup of flour is only about 125 g because flour is light and airy, while a cup of sugar is around 200 g. That's why a kitchen scale beats cups for baking. Here's a quick guide for one US cup of common ingredients:
| 1 cup of | Weighs about |
|---|---|
| Water | 237 g |
| All-purpose flour | 125 g |
| Granulated sugar | 200 g |
| Brown sugar (packed) | 220 g |
| Butter | 227 g |
| Milk | 244 g |
For weight on its own, the weight converter handles grams, ounces, and pounds.
Volume conversion chart
The cooking volumes you reach for most, so you'll find them at a glance.
| From | Equals | From | Equals |
|---|---|---|---|
| 1 tsp | 4.93 ml | 1 tbsp | 14.79 ml |
| 1 fl oz | 29.57 ml | 1/4 cup | 59.15 ml |
| 1/2 cup | 118.3 ml | 1 cup | 236.6 ml |
| 2 cups | 473.2 ml | 1 pint | 473.2 ml |
| 1 quart | 946.4 ml | 1 liter | 33.81 fl oz |
| 1 liter | 4.23 cups | 1 gallon | 3.785 L |
Need other units? The length and temperature converters round out the kitchen set, with more on the converters hub.
Frequently asked questions
How much is 250 ml in cups?
250 ml is about 1.06 US cups, just over a cup. It's also 8.45 fluid ounces. A metric cup is exactly 250 ml, so if a recipe uses metric cups, 250 ml is one cup on the nose.
Divide the milliliters by 29.5735, since one US fluid ounce is 29.5735 ml. So 100 ml is about 3.38 fl oz, and 500 ml is 16.9 fl oz. To go from fluid ounces to ml, multiply by 29.5735 instead. This is for fluid ounces, a volume; a dry ounce is a weight, so don't mix the two. The converter above does the volume side live.
A US cup is 236.6 ml, and a US tablespoon is 14.79 ml, so there are 16 tablespoons in a cup. A metric cup, used in Australia and parts of Europe, is 250 ml instead, so you'll want to check which one a recipe means. This tool uses US customary units, the standard in American recipes. Type 1 cup above to see it in ml, ounces, and more.
Divide the liters by 3.785, since one US gallon is 3.785 liters. So 5 liters is about 1.32 gallons, and 10 liters is 2.64 gallons. Going the other way, multiply gallons by 3.785. Note that a UK imperial gallon is larger, about 4.546 liters, so a US gallon and a UK gallon aren't the same. The converter uses US gallons.
That one depends on the ingredient, because grams measure weight and cups measure volume. A cup of water is 237 g, but a cup of flour is about 125 g and a cup of sugar is around 200 g, since they pack differently. So there's no single factor. Use the ingredient table on this page for the common ones, and you'll want to weigh your ingredients when a recipe needs precision.
US recipes use cups, tablespoons, and fluid ounces, while metric recipes use milliliters and liters. A US cup is 236.6 ml and a metric cup is 250 ml, close but not identical, which matters in baking. This converter works in US customary units. When a recipe is metric, convert the ml directly and you'll stay accurate.
There are 16 tablespoons in a US cup, 8 fluid ounces in a cup, and 3 teaspoons in a tablespoon. Those whole-number steps make scaling recipes easy: half a cup is 8 tablespoons, and a quarter cup is 4. The converter handles the awkward decimals, so you don't have to remember every relationship at once.
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