Millilitre to US Cup
Free instant millilitre to us cup converter. 1 mL = 0.00422675 cup.
Common Millilitre to US Cup values
| Millilitre (mL) | US Cup (cup) |
|---|---|
| 1 | 0.00422675 |
| 5 | 0.0211338 |
| 10 | 0.0422675 |
| 25 | 0.105669 |
| 50 | 0.211338 |
| 100 | 0.422675 |
| 500 | 2.11338 |
| 1000 | 4.22675 |
How does Millilitre to US Cup conversion work?
Type a value in the Millilitre (mL) field and the equivalent in US Cup (cup) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Millilitre. One thousandth of a litre. Equal to 1 cubic centimetre.
US Cup. The standard US cooking measurement. Exactly 8 US fluid ounces or about 237 mL.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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How it works — the formula
Volume scales as length cubed.
1 L = 1 dm³ = 0.001 m³ (exact)
1 US gallon = 3.785411784 L exactly
1 imperial gallon = 4.54609 L exactly (since 1985 redefinition)Volume is length cubed. The litre is a metric unit equal to one cubic decimetre. The US gallon (3.785411784 L) and imperial gallon (4.54609 L) differ by about 20%; US fluid measurements descend from the 1707 Queen Anne wine gallon, while imperial volumes were redefined in 1985 by the UK Weights and Measures Act in terms of the litre. US dry measurements (bushel, dry quart) form a separate system.
Worked examples
- Inputs:
- 1 US gal = ? L
- Output:
- 1 × 3.785411784 ≈ 3.7854 L
- Inputs:
- 1 UK gal = ? L
- Output:
- 1 × 4.54609 ≈ 4.5461 L (~20% larger than US gallon)
- Inputs:
- 2 cups (US) = ? mL
- Output:
- 2 × 236.5882365 ≈ 473.176 mL
Limitations
- US fluid ounce (29.5735296875 mL) ≠ UK fluid ounce (28.4130625 mL) ≠ avoirdupois weight ounce — all share the name "ounce".
- A "cup" varies: US legal cup is 240 mL, US customary cup is 236.5882365 mL, metric cup is 250 mL.
- Dry volumes (bushel, dry pint) follow a different scaling and are not interchangeable with fluid volumes.
- Gas-volume comparisons require pressure and temperature controls (STP, NTP, IUPAC) — pure unit conversion ignores those.
Conversions are exact rational arithmetic for SI ↔ US fluid ↔ imperial; cooking pages account for US-customary cup-size ambiguities by labelling "US cup" explicitly.