Cups to ML Converter
Convert US or metric cups to millilitres, and millilitres back to cups.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
1 mL ≈ 0.0042267528 US cup
About this calculator
A US customary cup is 236.588 millilitres, while a metric cup used in Australia and New Zealand is 250 millilitres. The difference is small per cup but adds up in a large batch.
Worked example
calculated with the default values below
Value 1 · Direction ⇄ · Decimal places 4 · From US cups · To Millilitres (ml) Result 236.5882 · Millilitres 236.59 ml · US customary cups 1.0000 cups · US fluid ounces 8.000 fl oz · Litres 0.2366 L
Method and assumptions
Formula basis and scope
The US customary cup is 236.5882365 mL; the separate metric-cup option is defined as 250 mL.
US customary and imperial liquid measures differ. This is volume, not ingredient mass; no density conversion is performed.
Data sources
Disclaimer
These calculators give general conversion results. Rounding and the precision of the value you enter both affect the output, so treat displayed decimals as indicative rather than exact.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
ml = cups × 236.5882365; cups = ml ÷ 236.5882365
- cups
- number of cups
- ml
- millilitres
US cup = 236.588 ml; metric cup = 250 ml; 1 fl oz = 29.5735 ml.
Frequently asked questions
Why is an Australian metric cup larger than a US cup?
The converter uses 236.588 millilitres for a US customary cup but 250 millilitres for the metric cup used in Australia and New Zealand, so one metric cup already holds about 13.4 millilitres more. Picking the metric cup direction therefore inflates every result, and the gap widens with volume: ten metric cups is 2.5 litres against 2.366 litres for ten US cups. The fluid ounces and litres outputs update to match the chosen basis.