Convert Cups to Milliliters – Volume Converter
This converter converts volumes expressed in US customary cups to milliliters (mL). Use it when a recipe, lab note, or specification lists volume in cups and you need an SI-compatible result.
The tool assumes the US customary cup definition (1 US cup = 236.5882365 mL). If you need conversions for a metric cup (250 mL) or an imperial/UK cup, select the appropriate unit elsewhere or apply the alternate factor noted below.
Governance
Record 277810a65aed • Reviewed by Fidamen Standards Committee
Interactive Converter
Convert between us cup and milliliter with precision rounding.
Quick reference table
| US Cup | Milliliter |
|---|---|
| CUP 1.00 cup | 236.5882 mL |
| CUP 5.00 cup | 1,182.9412 mL |
| CUP 10.00 cup | 2,365.8824 mL |
| CUP 25.00 cup | 5,914.7059 mL |
| CUP 50.00 cup | 11,829.4118 mL |
| CUP 100.00 cup | 23,658.8237 mL |
Methodology
We use the fixed mathematical relationship between the two units: 1 US cup = 236.5882365 milliliters. The number is consistent with published measurement references and common metrology practice for converting customary to SI units.
For high-accuracy needs (laboratory preparations, regulated labeling, or calibrated dispensing) use properly calibrated volumetric instruments and account for temperature, meniscus reading, and fluid properties. This converter gives a direct numeric conversion but does not replace calibrated measurement procedures.
Worked examples
2 US cups → 2 × 236.5882365 = 473.176473 mL (report as 473.18 mL if rounding to 2 decimal places).
0.5 US cup → 0.5 × 236.5882365 = 118.29411825 mL (round as needed for the application).
F.A.Q.
Which "cup" does this converter use?
This converter uses the US customary cup (1 US cup = 236.5882365 mL). If you require a metric cup (250 mL) or an imperial/UK cup (≈284.13125 mL), use the corresponding factor or a converter configured for that cup type.
How accurate is the conversion?
The numeric conversion is exact to the given factor. Practical measurement accuracy depends on how the volume was measured (instrument calibration, temperature, meniscus reading). For regulated or laboratory use, follow calibration and uncertainty procedures as described by national metrology guidance.
Do I need to consider temperature or fluid properties?
For most kitchen use, no. For scientific, industrial, or legal applications, temperature, density, and evaporation can affect measured volume. Use calibrated volumetric glassware or gravimetric methods and apply correction factors as required.
How should I round the result?
Round based on application requirements: recipes often use 1–2 significant figures; lab work may require uncertainty-based rounding per metrology standards. When in doubt, preserve extra digits then round at the final reporting step.
Sources & citations
- NIST — SI Units and Conversions (National Institute of Standards and Technology) — https://www.nist.gov/pml/weights-and-measures
- ISO 80000 — Quantities and units (International Organization for Standardization) — https://www.iso.org/standard/30669.html
- IEEE Standards — Standards database (measurement and instrumentation guidance) — https://standards.ieee.org
- OSHA — Occupational Safety and Health Administration (workplace measurement and handling guidance) — https://www.osha.gov
- NIST SP 811 — Guide for the Use of the International System of Units — https://www.nist.gov/pml/special-publication-811
Further resources
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Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: 277810a65aedWhat changed (latest)
v1.0.0 • 2025-11-24 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-24 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 24, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-24 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 71836b962713