How Many mL Are in a Cup?

Quick explanation

Use this page when a recipe is written in cups but your jug, scale workflow, or prep notes are metric. The fast answer is simple: 1 Metric cup is 250 mL, while 1 US cup is about 236.6 mL. That gap looks small on one ingredient, but it becomes noticeable when you scale soups, sauces, cake batter, or drink batches. Use this page as a go-to reference for both "cups to mL" and "how many mL are in a cup" questions, with a quick table that highlights the cup amounts that show up most in real cooking. Match the toggle to your recipe source, then compare nearby tools like mL to Cups Converter, How Many Ounces Are in a Cup?, or the ingredient-focused Ingredient Cups to Grams Chart + Calculator when weight matters more than volume.

Fast answer

1 Metric cup = 250 mL This is the default CupsToML standard for Canada-first, metric-friendly recipes.

1 US cup = 236.6 mL Use this when the recipe source or measuring set is clearly American.

Difference per cup: about 13.4 mL That gap looks small once, but it becomes obvious when a recipe uses several cups.

Which standard should I use?

Use the Metric setting when the recipe is Canadian, metric-first, or already thinks of 1 cup as 250 mL. Switch to US when the recipe is American or the measuring set is built around US cups. If you want the rulebook first, start with Kitchen Measurement Standards: How CupsToML Handles Assumptions and Metric vs US Cup: Why Results Differ before converting.

Metric vs US cup checkpoints

Cups	Metric cup	US cup
1	250 mL	236.6 mL
2	500 mL	473.2 mL
3	750 mL	709.8 mL
4	1000 mL	946.4 mL
6	1500 mL	1419.5 mL
8	2000 mL	1892.7 mL

Use the same standard across the full recipe so repeated cup amounts do not drift.

Amount

cup to mL

Unit preset (cups) Metric (250 mL, default) US (236.6 mL)

Converted value

250 mL

~ 250 mL

Scale preview

Quick kitchen estimate. For precise nutrition or production work, verify standards and source measurements.

Calculation steps

How to convert cups to mL manually

mL = cups × cup-size-in-mL

Use 250 mL for Metric cup and 236.588 mL for US cup.

Practical kitchen rounding

1 Metric cup = 250 mL; 1 US cup ≈ 237 mL

For home cooking, practical rounding is usually fine if you stay consistent on one standard.

Worked example

Input: 2

Metric: 2 × 250 = 500 mL; US: 2 × 236.588 = 473.2 mL.

Practical: 2 cups is roughly 500 mL (Metric) or 475 mL (US).

About these units

Cup (why standards differ)

“Cup” is not fully universal across recipe sources. This is why two pages can show different mL results for the same cup amount, even when both are technically correct.

Metric cup = 250 mL (common in metric-based recipe sources).
US cup = 236.588 mL (common in US recipe sources).
The per-cup gap is small, but it compounds quickly in larger recipes.

Millilitre (mL)

mL is a metric volume unit and works well for precise measuring jugs, prep containers, and repeatable scaling. It is often the easiest way to keep a recipe consistent once the cup standard is clear.

1000 mL = 1 L.
Using mL helps keep conversions consistent when scaling recipes.
Measuring by mL is often faster than estimating awkward cup fractions.

Tips

Many Canadian recipes assume 1 cup = 250 mL. Use the toggle if your recipe looks US-based.

If you’re comparing two recipes, standardize units first so you’re not mixing cup standards.

In many Metric recipes, 1 cup is 250 mL (common in Canada, the UK, Australia, and New Zealand). In the US it's about 236.6 mL; that's why results can differ.

Quick Reference

cup	mL
0.25	62.5
0.33	83.25
0.5	125
0.67	166.75
0.75	187.5
1	250
1.5	375
2	500
3	750
4	1000

FAQ

How many mL are in 1 cup?

In many metric recipes, 1 cup is 250 mL (common in Canada, the UK, Australia, New Zealand, and other metric-based recipes worldwide). In the US, 1 cup is about 236.6 mL.

Why is there a Metric/US cup toggle?

Cup size depends on the recipe’s regional standard. We default to Metric (250 mL), which is common in Canada, the UK, Australia, New Zealand, and many metric-based recipes worldwide. Switch to US (236.6 mL) when using US recipe sources.

When should I switch cup standards?

Use the standard that matches your recipe source and measuring tools. If the recipe gives mL anywhere, measure by mL and skip the guesswork.

Is 500 mL always 2 cups?

500 mL is exactly 2 Metric cups, but it is about 2.11 US cups.

Should I round cup-to-mL results?

For everyday cooking, light rounding is fine. For baking consistency, keep one standard throughout the recipe.

When is cups to mL most useful in real cooking?

It is most useful when a recipe is written in cups but your measuring jug is marked in mL, or when you want to scale liquids once and pour directly without converting every line separately.

Key guides and charts

Metric vs US Cup: Why Results Differ Use this when the recipe says “cup” but the region or measuring set is unclear. Kitchen Measurement Standards: How CupsToML Handles Assumptions See the site-wide defaults, ingredient assumptions, and when CupsToML switches from convenience to caution. Ingredient Cups to Grams Chart + Calculator Use grams when the real issue is baking consistency or ingredient density, not just liquid volume. US vs Metric Cup: Practical Recipe Examples See how the per-cup gap changes soups, batters, and larger batches in the real kitchen.