ML to Cups Conversion
236.6 ml = 1 US cup. 250 ml = 1 metric cup.
Conversion Table
| To | From |
|---|---|
| 1 tbsp | 15 ml |
| 1/8 cup | 30 ml |
| 1/4 cup | 60 ml |
| 1/3 cup | 80 ml |
| 1/2 cup | 120 ml |
| 2/3 cup | 160 ml |
| 3/4 cup | 180 ml |
| 1 cup | 237 ml |
| 1.5 cups | 355 ml |
| 2 cups | 473 ml |
| 4 cups (1 quart) | 946 ml |
A milliliter (ml) measures volume in the metric system. A cup measures volume in the US customary system. The conversion depends on which cup you're using.
US recipes use the US cup: 236.6 ml. Australian, UK, and Canadian recipes often use the metric cup: 250 ml. That 13.4 ml difference adds up. Four metric cups hold 53.6 ml more than four US cups, enough to throw off cake batters and bread doughs.
Most liquid measuring cups sold in the US show both ml and cup markings. The ml scale gives you precision. The cup markings are convenient for following American recipes. When converting between systems, know your source. A British recipe calling for 500 ml means exactly 2 metric cups. An American recipe calling for 2 cups means 473.2 ml.
How to Convert
Divide milliliters by 236.6 for US cups. Divide by 250 for metric cups.
US cups: 500 ml ÷ 236.6 = 2.11 cups Metric cups: 500 ml ÷ 250 = 2 cups
For common measurements, memorize these benchmarks. 60 ml = 1/4 US cup. 120 ml = 1/2 US cup. 240 ml = 1 US cup (close enough for cooking). For baking, use the exact 236.6 ml conversion.
Worked example: a European recipe calls for 375 ml of milk. For US cups: 375 ÷ 236.6 = 1.58 cups. Round to 1.5 cups plus 2 tablespoons. For metric cups: 375 ÷ 250 = 1.5 cups exactly.
Common Mistakes
Assuming all recipes use the same cup size. Japanese rice cooker cups hold 180 ml. Coffee maker cups vary from 120 ml to 150 ml. Always check.
Rounding 250 ml to 1 US cup. That 13.4 ml error compounds. In a recipe using 6 cups of liquid, you'd be off by 80 ml. Enough to ruin custards, rice dishes, and yeast breads.
Mixing up fluid ounces and milliliters. One US fluid ounce = 29.57 ml. Eight fluid ounces = 1 US cup = 236.6 ml. The numbers are close enough to cause confusion but different enough to matter.
Pro Tips
Buy a liquid measuring cup with ml markings. Pyrex and OXO make good ones for $8-12. The ml scale runs up the side in 50 ml increments. More precise than cup lines.
For small amounts under 60 ml, use measuring spoons. 1 tablespoon = 15 ml. 1 teaspoon = 5 ml. These conversions work worldwide.
Label your measuring cups. Write "US" or "metric" on the handle with a permanent marker. Prevents mix-ups when you own both types. Many cooks do because they follow international recipes.
Ingredient-Specific Notes
Water
1 ml weighs 1 gram at room temperature. Makes mental math easy. 500 ml of water = 500g = 2.11 US cups = 2 metric cups. Temperature barely affects volume. Hot water expands by about 4% at boiling.
Milk
Slightly denser than water. 1 ml of whole milk weighs 1.03g. The volume conversion stays the same: 236.6 ml = 1 US cup. Fat content doesn't change volume measurements enough to matter in cooking.
Oil
Less dense than water. 1 ml of vegetable oil weighs 0.92g. Volume conversions remain constant: 236.6 ml = 1 US cup. Different oils (olive, canola, coconut) have slightly different densities but the same volume.
Honey
Much denser than water at 1.4g per ml. Volume conversion unchanged but harder to measure accurately. Spray the measuring cup with oil first. Honey slides out cleanly. 340g of honey = 240 ml = about 1 US cup.
Vinegar
Similar density to water. Standard white vinegar is 5% acetic acid, 95% water. Volume conversions are identical. Balsamic vinegar is slightly denser due to sugar content but use the same ml to cup ratios.
Frequently Asked Questions
How many ml in a cup?
236.6 ml in a US cup. 250 ml in a metric cup. US recipes use US cups. Australian and UK recipes typically use metric cups. The difference is 5.4%. Small for one cup, significant for multiple cups. A recipe calling for 4 cups means 946.4 ml (US) or 1000 ml (metric). That 53.6 ml difference affects texture in baking. Check which system your recipe uses.
Is 250ml equal to 1 cup?
Only for metric cups. US cups hold 236.6 ml. The 13.4 ml difference matters in precise recipes. Bread doughs need specific hydration ratios. Custards set at exact liquid-to-egg proportions. For casual cooking like soups or smoothies, treating 250 ml as 1 cup works fine. For baking, use the exact conversion. Most measuring cups show both ml and cup markings. Use the ml side for accuracy.
How do I convert 500 ml to cups?
Divide 500 by 236.6 for US cups: 2.11 cups. Divide 500 by 250 for metric cups: 2 cups exactly. In practice, 2 cups plus 2 tablespoons works for US measurements. Many recipes round 500 ml to 2 cups for simplicity. The 26.8 ml difference (about 2 tablespoons) rarely ruins a dish. Yeast breads and delicate cakes are exceptions where precision matters.
Why do recipes mix ml and cups?
Recipe writers adapt content for international audiences. A Canadian food blogger might list both measurements. Package sizes also drive this. Canned coconut milk comes in 400 ml cans worldwide. US recipe writers convert this to "about 1.75 cups" for American readers. European recipes might call for "2 cups (500 ml)" to help US cooks. The dual listing prevents conversion errors.
What's the easiest way to measure ml without a metric measuring cup?
Use a liquid measuring cup with ml markings. Most Pyrex and Anchor Hocking cups sold in the US show both scales. No math required. For small amounts, use spoons: 1 tablespoon = 15 ml, 1 teaspoon = 5 ml. These conversions are exact worldwide. A US cup measure plus tablespoons also works: 1 cup = 240 ml (close enough), 1 cup + 1 tbsp = 255 ml, 1 cup - 1 tbsp = 225 ml.