2 Cups to ml: What Two US Cups Equal
Convert 2 cups to ml: two US cups equal 473.18 ml. Learn the exact cup-to-ml factor, how it fits common recipe volumes, and nearby cup-to-ml values.
Why Two Cups Matters
The cup is the standard US cooking measure, and many recipes call for two cups of liquid or flour. Metric kitchens measure the same amount in milliliters, so the 2-cup figure is a frequent conversion.
Two US cups equal 473.176 ml. Our cups to ml converter gives the exact value; 473 ml is the rounded figure you will see on a metric jug.
The 2 Cups to ml Formula
One US legal cup is defined as 240 ml in nutrition labeling, but the customary cup used in recipes is 236.588 ml (half a pint). Two cups are 2 × 236.588 = 473.176 ml.
The Exact Calculation
For 2 cups: 2 × 236.5882365 = 473.176473 ml, rounded to 473.18 ml. For 1 cup it is 236.59 ml, so doubling is straightforward.
If you follow USDA nutrition labels that use a 240 ml "legal cup," 2 cups would be 480 ml. For everyday recipes, use 236.59 ml per cup.
Why Cups Vary Slightly
The customary cup (236.59 ml) comes from the pint (473.18 ml = 2 cups). The separate 240 ml "legal cup" exists only for food labeling. Most kitchen conversions use 236.59 ml.
What 473 ml Looks Like
Two cups is one US pint, the size of a small carton of cream or a large mug of liquid. It is just shy of a 500 ml metric bottle, a useful mental anchor when substituting.
Nearby values: 1 cup = 236.59 ml, 3 cups = 709.76 ml, 4 cups (1 quart) = 946.35 ml. Each cup adds a steady 236.59 ml.
2 Cups Compared With Nearby Volumes
For reference, 1.5 cups = 354.88 ml and 2.5 cups = 591.47 ml. The steps are even because the cup is a fixed volume.
For the one-cup baseline, our guide to 1 cup to ml covers the single-cup case in detail.
When You Need 2 Cups in ml
The conversion is essential in baking, where US recipes list cups and metric scales or jugs show milliliters. Two cups of water, milk, or broth becomes 473 ml on a metric measure.
It also helps when scaling a recipe up or down, since the cup-to-ml ratio stays constant at 236.59 ml per cup.
Frequently Asked Questions
How many ml is 2 cups?
2 US customary cups equal 473.176 ml, normally rounded to 473.18 ml (one US pint).
How do I convert cups to ml?
Multiply cups by 236.588. For 2 cups: 2 × 236.588 = 473.18 ml.
Is a cup exactly 240 ml?
The USDA legal cup is 240 ml for labels, but the customary recipe cup is 236.59 ml. Most kitchen math uses 236.59 ml.
How many ml is 4 cups?
4 US cups equal 946.35 ml, which is one US quart.
What is 2 cups in liters?
473.18 ml is 0.473 liters, just under half a liter.
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Quick Summary
2 US cups equal 473.18 ml. Multiply cups by 236.588 (the customary ml per cup): 2 × 236.588 = 473.18 ml. That is exactly one US pint, just under a 500 ml bottle.
Related Guide
1 Cup to ml: The Essential US Cooking Conversion
Convert 1 cup to ml with the exact formula: 1 US cup equals 236.59 ml. The key link between American recipes and metric measuring tools.
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Disclaimer
Unit conversions on this site use internationally recognized, fixed conversion factors (for example, 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 °F = (°C × 9/5) + 32). They are provided for general, informational, and educational use. For applications where accuracy is critical — such as medical dosing, engineering, scientific research, trade, or legal compliance — always verify results against authoritative sources such as the U.S. National Institute of Standards and Technology (NIST) and the official International System of Units (SI) brochure, and follow any applicable local standards.
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 US gallon (gal) = 3.785411784 litres (exact, 231 in³)
- EXACT1 US fluid ounce (fl oz) = 29.5735295625 mL (exact, 1/128 gal)
- EXACT1 US cup = 236.5882365 mL (exact, 8 fl oz)
- EXACT1 US pint (pt) = 473.176473 mL (exact, 16 fl oz)
- EXACT1 US quart (qt) = 946.352946 mL (exact, 32 fl oz)
- EXACT1 litre (L) = 1000 millilitres (definition)
Common Pitfalls & How to Avoid Them
US vs. Imperial (UK) cups
A US cup is 236.59 mL, but a UK/metric cup is 250 mL and an Imperial cup is ~284 mL. Recipes from different countries are not interchangeable drop-in.
Fluid ounce is volume, not mass
A US fl oz is 29.57 mL of volume. 1 fl oz of water ≈ 29.57 g, but 1 fl oz of honey or oil weighs more. Do not treat fluid ounces as grams.
Teaspoon/tablespoon sizes differ
1 US tbsp = 14.7868 mL; 1 US tsp = 4.92892 mL. Metric measuring spoons are 15 mL and 5 mL — close but not exact; for baking precision use weighed grams.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
- BIPM (International Bureau of Weights and Measures) — SI Brochure — The International System of Units (9th edition)
Last Updated 2026 | This article was reviewed for accuracy