Cups to mL
Precise. Instant. No guessing.
One cup does not equal one cup. Depending on where your recipe comes from, a single cup measurement ranges from 200 mL to 284 mL. Use the wrong standard in a baking recipe and you shift ingredient ratios by more than 10 percent — enough to change texture, rise, and outcome.
This guide gives you the exact conversion formula for every cup standard, a full conversion table from ⅛ cup to 16 cups, a cross-reference with tablespoons and fluid ounces, and a clear method to identify which cup your recipe uses. The interactive converter at the top of this page handles the calculation instantly.
Table of Contents
- The Conversion Formula
- Cup Standards Around the World
- Full Cups to mL Conversion Table
- Common Fractions Converted
- Cups, Tablespoons, and Teaspoons Cross-Reference
- Dry vs Liquid Measurements
- When to Use a Scale Instead
- Mistakes to Avoid
- How to Identify Which Cup Your Recipe Uses
- Frequently Asked Questions
The Conversion Formula
Converting cups to mL is a single multiplication. The only variable is which cup standard your recipe uses.
| Cup Standard | mL per Cup | Formula |
|---|---|---|
| US Customary | 236.588 mL | cups × 236.588 |
| US Legal (FDA) | 240 mL | cups × 240 |
| Metric | 250 mL | cups × 250 |
| Imperial (UK) | 284.13 mL | cups × 284.13 |
| Japanese | 200 mL | cups × 200 |
Example — US cups: 3 cups × 236.588 = 709.76 mL
Example — metric cups: 3 cups × 250 = 750 mL
To reverse the conversion and go from mL back to cups, divide by the same factor. 500 mL ÷ 236.588 = 2.11 US cups. 500 mL ÷ 250 = 2 metric cups exactly.
Quick kitchen shortcut: Multiply US cups by 240 for a working estimate. The 3.4 mL difference per cup is negligible in most savory cooking. For baking, use 236.588 to keep ingredient ratios accurate.
Cup Standards Around the World
The word “cup” refers to five distinct volumes depending on where the recipe originates. Using the wrong standard introduces errors that stack with every cup in the recipe.
| Cup Standard | mL per Cup | Where Used | Notes |
|---|---|---|---|
| US Customary | 236.588 mL | United States | Most common in American cookbooks and online recipes |
| US Legal (FDA) | 240 mL | US nutrition labels | Used on packaged food labels; not the cooking standard |
| Metric | 250 mL | Australia, NZ, Canada, South Africa | Defined exactly as 250 mL; no rounding needed |
| Imperial (UK) | 284.13 mL | Pre-1970s UK and older Commonwealth recipes | Rarely used today; modern UK recipes measure in grams and mL |
| Japanese | 200 mL | Japan | Defined by the Japanese Industrial Standards (JIS); common in rice and liquid measurements |
The US customary cup and the metric cup differ by 13.4 mL. In a 4-cup recipe, that gap reaches 53.6 mL — more than 3 tablespoons. In bread baking, that volume shifts dough hydration and changes the crumb structure. In custard or cake batter, it changes set and texture.
The Japanese cup at 200 mL is the least intuitive gap. A recipe calling for 2 Japanese cups delivers only 400 mL, compared to 473 mL from 2 US cups. For rice cooking ratios, that difference changes the water-to-grain balance and affects the final texture.
Full Cups to mL Conversion Table
The table below covers US customary cups (236.588 mL) and metric cups (250 mL) across the most common recipe volumes.
| Cups | US mL (236.6) | Metric mL (250) | US Fluid Oz | Liters (US) |
|---|---|---|---|---|
| ⅛ cup | 29.6 mL | 31.25 mL | 1 fl oz | 0.030 L |
| ¼ cup | 59.1 mL | 62.5 mL | 2 fl oz | 0.059 L |
| ⅓ cup | 78.9 mL | 83.3 mL | 2.67 fl oz | 0.079 L |
| ½ cup | 118.3 mL | 125 mL | 4 fl oz | 0.118 L |
| ⅔ cup | 157.7 mL | 166.7 mL | 5.33 fl oz | 0.158 L |
| ¾ cup | 177.4 mL | 187.5 mL | 6 fl oz | 0.177 L |
| 1 cup | 236.6 mL | 250 mL | 8 fl oz | 0.237 L |
| 1¼ cups | 295.7 mL | 312.5 mL | 10 fl oz | 0.296 L |
| 1½ cups | 354.9 mL | 375 mL | 12 fl oz | 0.355 L |
| 2 cups | 473.2 mL | 500 mL | 16 fl oz | 0.473 L |
| 2½ cups | 591.5 mL | 625 mL | 20 fl oz | 0.592 L |
| 3 cups | 709.8 mL | 750 mL | 24 fl oz | 0.710 L |
| 3½ cups | 828.1 mL | 875 mL | 28 fl oz | 0.828 L |
| 4 cups (1 qt) | 946.4 mL | 1,000 mL | 32 fl oz | 0.946 L |
| 5 cups | 1,182.9 mL | 1,250 mL | 40 fl oz | 1.183 L |
| 6 cups | 1,419.5 mL | 1,500 mL | 48 fl oz | 1.420 L |
| 8 cups (½ gal) | 1,892.7 mL | 2,000 mL | 64 fl oz | 1.893 L |
| 12 cups | 2,839.1 mL | 3,000 mL | 96 fl oz | 2.839 L |
| 16 cups (1 gal) | 3,785.4 mL | 4,000 mL | 128 fl oz | 3.785 L |
Common Fractions Converted
Most recipes use fractional cup measurements. These are the values used in everyday cooking and baking, with both US and metric figures side by side.
| Fraction | Decimal | US mL | Metric mL |
|---|---|---|---|
| ⅛ cup | 0.125 | 29.6 mL | 31.25 mL |
| ¼ cup | 0.25 | 59.1 mL | 62.5 mL |
| ⅓ cup | 0.333 | 78.9 mL | 83.3 mL |
| ½ cup | 0.5 | 118.3 mL | 125 mL |
| ⅔ cup | 0.667 | 157.7 mL | 166.7 mL |
| ¾ cup | 0.75 | 177.4 mL | 187.5 mL |
| 1 cup | 1.0 | 236.6 mL | 250 mL |
Cups, Tablespoons, and Teaspoons Cross-Reference
Many recipes combine cup and tablespoon measurements. This cross-reference shows how cups, tablespoons, teaspoons, and mL align, using US standard values.
| Cups (US) | Tablespoons | Teaspoons | mL |
|---|---|---|---|
| ⅛ cup | 2 tbsp | 6 tsp | 29.6 mL |
| ¼ cup | 4 tbsp | 12 tsp | 59.1 mL |
| ⅓ cup | 5 tbsp + 1 tsp | 16 tsp | 78.9 mL |
| ½ cup | 8 tbsp | 24 tsp | 118.3 mL |
| ⅔ cup | 10 tbsp + 2 tsp | 32 tsp | 157.7 mL |
| ¾ cup | 12 tbsp | 36 tsp | 177.4 mL |
| 1 cup | 16 tbsp | 48 tsp | 236.6 mL |
1 US tablespoon = 14.787 mL. 1 US teaspoon = 4.929 mL. These figures match the US customary system defined by the National Institute of Standards and Technology (NIST).
Dry vs Liquid Measurements
The cups-to-mL conversion is a volume-to-volume calculation. It applies equally to liquids and dry ingredients. One cup of water and one cup of flour occupy the same volume — 236.6 mL — but they do not weigh the same.
| Ingredient | Volume (1 US Cup) | Approximate Weight |
|---|---|---|
| Water | 236.6 mL | 236.6 g |
| Whole milk | 236.6 mL | ~244 g |
| All-purpose flour | 236.6 mL | ~120 g |
| Granulated sugar | 236.6 mL | ~200 g |
| Brown sugar (packed) | 236.6 mL | ~220 g |
| Butter | 236.6 mL | ~227 g |
| Honey | 236.6 mL | ~340 g |
| Olive oil | 236.6 mL | ~216 g |
For liquids in everyday cooking, converting cups to mL gives you accurate enough results without a scale. The density of most culinary liquids is close enough to water that the volume conversion holds.
For dry ingredients in baking, the mL volume stays constant but the weight — and therefore the ingredient quantity — varies significantly depending on how you fill the cup. That variation is the source of most inconsistency in home baking.
When to Use a Kitchen Scale Instead
A kitchen scale removes the cup standard problem entirely. When you weigh ingredients in grams, there is no ambiguity about which cup your recipe assumes.
Use a scale when:
- You bake bread, pastry, or any recipe where flour-to-liquid ratios determine texture
- You are scaling a recipe up or down from the original
- Your recipe originated in a professional or commercial kitchen (these always use weight)
- You are following a recipe from the UK or Europe — these use grams and mL, not cups
Use volume measuring cups when:
- You cook savory dishes where precision is less critical
- The recipe is from a source you trust that specifies the cup standard
- You measure liquids, where volume-to-weight variation is minimal
Professional bakers measure all ingredients by weight. Flour measured by scooping directly into a cup can be up to 25% heavier than flour measured by the spoon-and-level method — even though both fill the cup to the same mL volume. Weight eliminates that variable entirely.
Mistakes to Avoid
Using the wrong cup standard
A recipe calling for 2 metric cups (500 mL) measured with US cups delivers only 473 mL — a gap of 27 mL or roughly 1.8 tablespoons. In a cake batter or custard, that changes consistency. Always confirm the cup standard before you start.
Scooping dry ingredients directly from the bag
Scooping a cup into a flour bag compresses the flour and adds up to 25% more mass for the same mL volume. Spoon flour into the measuring cup and level it off. For any precision baking, use a kitchen scale in grams.
Reading liquid measuring cups from above
Liquid forms a curved surface in a measuring cup called a meniscus. Reading from above makes the cup appear fuller than it is. Place the cup on a flat surface and read at eye level from the bottom of the curve.
Rounding at each step when scaling a recipe
Convert cups to mL first, then scale from the converted mL total. Rounding at each intermediate step compounds the error. Convert once, scale from the total, then round at the final step.
Using a drinking cup as a measuring cup
Drinking cups vary from roughly 200 mL to over 400 mL. They are not calibrated measuring tools. For any recipe that depends on ratios, use a measuring cup with mL markings, or weigh on a kitchen scale.
How to Identify Which Cup Your Recipe Uses
You do not always need to ask — the recipe itself signals which cup standard to use.
- Fahrenheit temperatures + cups: US customary cups (236.588 mL). This combination appears in almost all American recipes.
- Celsius temperatures + cups, from Australia, NZ, or South Africa: Metric cups (250 mL).
- Celsius temperatures + cups, from Canada: Metric cups (250 mL), though Canadian recipes increasingly use weight.
- Celsius + grams or mL only, from UK or Europe: No cup standard applies. Measure as stated.
- Japanese recipes measuring rice or liquids in cups: Japanese cups (200 mL), unless the recipe explicitly states otherwise.
- Pre-1970s UK or Commonwealth recipes: Imperial cups (284.13 mL). Modern UK recipes do not use cups.
When in doubt, check the recipe source. A recipe from a US food publication uses US cups. A recipe from an Australian publisher uses metric cups. If the source is ambiguous, the converter at the top of this page accepts all five cup standards.
Frequently Asked Questions
How many mL are in 1 cup?
One US customary cup equals 236.588 mL. The US legal (FDA) cup equals 240 mL. A metric cup equals exactly 250 mL. An imperial cup equals 284.13 mL. A Japanese cup equals 200 mL. For everyday US cooking, 240 mL is a practical working number.
How do I convert cups to mL?
Multiply the number of US cups by 236.588. For metric cups, multiply by 250. To reverse the conversion, divide the mL value by the same factor. Example: 500 mL ÷ 236.588 = 2.11 US cups.
Is a US cup the same as a metric cup?
No. A US cup is 236.588 mL. A metric cup is 250 mL. The gap is 13.4 mL per cup — enough to alter baked goods over a multi-cup recipe.
How many mL is half a cup?
Half a US cup equals 118.3 mL. Half a metric cup equals exactly 125 mL.
Why does my recipe say 240 mL per cup instead of 236.588?
240 mL is the US legal cup defined by the FDA for nutrition labels. For cooking, the 3.4 mL difference is negligible. For precision baking, use 236.588 mL.
How many cups is 250 mL?
250 mL equals exactly 1 metric cup, used in Australia, New Zealand, Canada, and South Africa. In US cups, 250 mL equals approximately 1.057 cups.
Does the type of ingredient change the cups-to-mL conversion?
No. Volume stays constant regardless of ingredient. One cup of water and one cup of flour both occupy 236.6 mL. Their weights differ because their densities differ, but the mL value does not change.
