Factors come from the stored source family and are not derived from rounded display values.
Guides
Kitchen, cups, millilitres and recipe values
Cups and millilitres are volume. Dry ingredients also need density or a recipe source.
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Unit console
Converter unidades com fórmula, contexto e precisão
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Volume
Fast path
Volume is robust for liquids. For dry ingredients it does not replace weighing because density and packing vary.
Search and practice paths
Search and practice paths
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UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
Do not use as the sole basis for official, medical, safety-critical or contractual decisions.
Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Volume. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.
Common questions
Is a cup always 250 ml?
Cups and millilitres are volume. Dry ingredients also need density or a recipe source.
When do I need grams instead of millilitres?
Cups and millilitres are volume. Dry ingredients also need density or a recipe source.
What is the factor for Cup a Millilitre?
1 cup = 236,5882365 ml
Which formula does Cup a Millilitre use?
US cup. Then the value is converted through the base unit l into Millilitre.