Milliliters to Cups Converter (mL to cups)
Convert milliliters and cups while choosing a US customary cup or a 250 mL metric cup.
How it works
Use 236.5882365 mL per US customary cup or 250 mL per metric cup, depending on the selected standard.
Formula / calculation method
US cups = mL ÷ 236.5882365mL = US cups × 236.5882365Metric cups = mL ÷ 250mL = Metric cups × 250
Worked examples
- 250 mL equals exactly 1 metric cup.
- 250 mL is approximately 1.05669 US customary cups.
When this tool helps
Useful for recipes, beverages, meal preparation, food labels, kitchen measuring, and adapting instructions between US customary and metric cup standards.
Related calculations: milliliters to fluid ounces, liters to gallons, and tablespoons to cups.
Browse this topic: Volume & Cooking Converters · Cooking Measurement Standards Guide.
Quick reference
| Input | Result |
|---|---|
| 250 mL | 1 metric cup |
| 236.5882365 mL | 1 US cup |
| 500 mL | 2 metric cups |
Accuracy and definitions
Cup size is not universal. Solveberry requires you to choose the cup definition rather than silently assuming one standard.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.8 conversion factors
- NIST Metric Kitchen — cooking measurement equivalencies
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Use 236.5882365 mL per US customary cup or 250 mL per metric cup, depending on the selected standard.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
Is a US cup 250 mL?
No. A US customary cup is about 236.5882365 mL; a common metric cup is 250 mL.
Which cup should I use?
Use the standard stated by the recipe or source. If it is not stated, check the publication's measurement convention.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.