1 US cup = 236.5882365 mL (this is the commonly used US customary cup). If a recipe or label uses different conventions you may see 240 mL (nutrition labeling), 250 mL (metric cup) or 284.13 mL (old UK/Imperial cup).

How this calculator works

• From cups to mL: multiply the number of cups by 236.5882365.
  mL = cups × 236.5882365
• From mL to cups: divide milliliters by 236.5882365.
  cups = mL ÷ 236.5882365

These values use the US customary cup standard (8 fluid ounces = 1 cup). If you need a metric or UK cup, see the note below.

Common cup fractions → milliliters (US cup standard)

Cups (US)	Milliliters (mL)
1/8 cup	29.574 mL
1/4 cup	59.147 mL
0.25 cup	59.147 mL
1/3 cup	78.863 mL
3/8 cup	88.721 mL
1/2 cup	118.294 mL
0.75 cup	177.441 mL
2/3 cup	157.725 mL
3/4 cup	177.441 mL
1 cup	236.588 mL
1 1/4 cups	295.735 mL
1 1/3 cups	315.451 mL
1 1/2 cups	354.882 mL
1 3/4 cups	413.029 mL
2 cups	473.176 mL
3 cups	709.765 mL
4 cups	946.353 mL
8 cups	1,892.706 mL

Example Calculations – Cups to Milliliters

Cup Value	Calculation	Result (mL)
1 1/4 cups	1.25 × 236.5882365	295.735 mL
1 1/3 cups	1.333… × 236.5882365	315.451 mL
1 3/4 cups	1.75 × 236.5882365	413.029 mL
1.5 cups	1.5 × 236.5882365	354.882 mL
0.25 cup	0.25 × 236.5882365	59.147 mL
0.75 cup	0.75 × 236.5882365	177.441 mL
3 cups	3 × 236.5882365	709.765 mL

Everyday milliliters → cups (US cup standard)

Milliliters (mL)	Cups (US)
5 mL	0.021134 cups
15 mL (1 tbsp)	0.063401 cups
30 mL (1 fl oz)	0.126803 cups
50 mL	0.211338 cups
100 mL	0.422675 cups
236.588 mL	1.000000 cups
250 mL	1.056688 cups
500 mL	2.113376 cups
1000 mL (1 L)	4.226753 cups

When to use this converter

• Scaling a recipe: Convert 2¾ cups to mL 2.75 × 236.5882365 = 650.1186 mL → show result rounded to your desired precision (e.g., 650.12 mL).
• Liquid medicine / lab work: Enter mL and convert to cups when you need a household equivalent.
• Substituting measuring cups: Convert a volume in mL to cups so you can use a standard measuring cup for serving or mixing.

Example conversions (US cup = 236.588… mL):

• 1 cup → 236.588 mL.
• 1/2 cup → 118.294 mL.
• 3 cups → 709.7647 mL.

Baking & cooking tips

• Prefer weight for baking: Dry ingredients vary in density—1 cup of flour ≠ 1 cup of sugar by grams. Use weight (grams) for precision when baking. See ingredient-specific conversions if precision matters.
• Measure liquids at eye level: Use a clear measuring jug on a flat surface for best accuracy.
• Round sensibly: For cooking, rounding to 1–2 decimal places is usually fine; for medical or lab uses, keep more precision.

Accuracy

This calculator uses the widely accepted conversion 236.5882365 mL per US cup for maximum precision. The displayed result is trimmed for readability (trailing zeros removed), but you can keep as many decimal places as your use-case requires (kitchen vs. lab).

Common pitfalls (avoid these)

• Assuming “cup” always equals 250 mL. That’s the metric cup, useful but not universal.
• Using dry cup volumes as weights. Flour, sugar, butter and liquids weigh differently, don’t swap volume for mass without ingredient-specific factors.
• Relying on nutrition label conventions. Labels sometimes use 240 mL for simplicity, verify when precision is required.

What each input means

• From (value): The numeric amount you have, either cups (when converting to mL) or milliliters (when converting to cups).
• To (result): The output after conversion, shown with trimmed trailing zeros; exact precision retained internally.
• Switch direction: Toggles whether you’re converting cups → mL or mL → cups.