How do I convert milliliters to cups?

By Paulo de VriesLast verified 2026-05-204 sources~7 min readhigh consensus

US standard: 1 cup = 240 mL. Metric cup: 1 cup = 250 mL. Quick conversions: 60 mL = 1/4 cup · 120 mL = 1/2 cup · 180 mL = 3/4 cup · 240 mL = 1 cup · 480 mL = 2 cups · 1000 mL (1 L) = 4.2 cups (US) or 4 cups (metric). Use scale or measuring jug for precision.

Download open dataset🔗 APICC-BY-4.0 · attribute AskedWell

The full answer

Milliliter-to-cup conversion is the most common metric-to-US recipe translation. The "right" answer depends on which standard the recipe uses: US (240 mL/cup), metric (250 mL/cup), or Imperial UK (284 mL/cup historically; modern UK recipes use metric 250 mL/cup). Most international cookbooks specify; American recipes default to 240 mL/cup.

**The standard cup definitions:**

- **US cup:** 240 mL (8 US fluid ounces) - **Metric cup:** 250 mL (used in Australia, NZ, modern UK) - **UK Imperial cup (legacy):** 284 mL (rarely used in modern recipes) - **Japanese cup:** 200 mL (used in Japanese recipes + rice cooker measurements)

For most cooking, the 240 mL vs 250 mL difference (~4%) is negligible. For precision baking, it matters.

**Standard mL-to-cup conversions (US cup = 240 mL):**

| Milliliters (mL) | US Cups | Metric Cups | Notes | |---|---|---|---| | 15 mL | 1 tbsp | 1 tbsp | Tablespoon | | 30 mL | 2 tbsp = 1/8 cup | 2 tbsp | 1 fluid ounce | | 60 mL | 1/4 cup | 1/4 cup | Standard small amount | | 80 mL | 1/3 cup | — | US-specific | | 120 mL | 1/2 cup | ~1/2 cup | Standard | | 160 mL | 2/3 cup | — | US-specific | | 180 mL | 3/4 cup | — | US-specific | | 200 mL | 5/6 cup | 4/5 cup | Japanese cup | | 240 mL | **1 cup** (US) | ~1 cup | US standard | | 250 mL | 1 cup + 1 tsp | **1 cup** (metric) | Metric standard | | 350 mL | 1.5 cups | 1.4 cups | — | | 480 mL | 2 cups | 1.9 cups | 1 US pint | | 500 mL | 2.1 cups | 2 cups | Half-liter | | 1000 mL (1 L) | 4.2 cups | 4 cups | 1 liter |

**Common liquid conversions:**

**Water + water-based liquids (most accurate):** - 60 mL = 1/4 cup (4 tbsp) - 80 mL = 1/3 cup - 120 mL = 1/2 cup - 240 mL = 1 cup - 360 mL = 1.5 cups - 480 mL = 2 cups

**Milk, cream, juice, broth, wine:** - Same as water for cooking purposes (density very close to 1 g/mL) - 1/4 cup = 60 mL · 1/3 cup = 80 mL · 1/2 cup = 120 mL · 3/4 cup = 180 mL · 1 cup = 240 mL

**Honey, syrup, molasses (much denser):** - Volume measurement same (1 cup = 240 mL) - Weight different (1 cup honey = 340g vs 1 cup water = 240g) - Measure by volume for recipes; weigh for baking precision

**Oils:** - Similar volume to water (1 cup = 240 mL) - Slightly less dense (1 cup olive oil = 215g vs 1 cup water = 240g) - Volume measurement is fine for cooking

**Common UK/European conversions to US cups:**

**Metric standard (UK, Australia, NZ, EU):**

| mL | Conversion | |---|---| | 250 mL | 1 metric cup = 1.04 US cups (call it 1 cup) | | 500 mL | 2 metric cups = 2.1 US cups | | 750 mL | 3 metric cups = 3.1 US cups | | 1 L | 4 metric cups = 4.2 US cups |

**For practical cooking purposes:** use 240 mL OR 250 mL interchangeably as "1 cup." The 4% difference rarely affects results except in precision baking.

**For baking precision:** - Use weight (grams) instead of volume — eliminates the cup-size ambiguity - See /pages/how-to-convert/cups-to-grams for ingredient-specific weights

**Tablespoon + teaspoon to mL:**

- **1 tablespoon (US):** 15 mL - **1 teaspoon (US):** 5 mL - **1 dessertspoon:** 10 mL (UK/AUS, between tsp + tbsp)

**Fluid ounce conversions:**

- **1 US fluid ounce:** 29.6 mL - **1 UK Imperial fluid ounce:** 28.4 mL - **1 cup (8 US fl oz):** 240 mL - **1 pint (16 US fl oz):** 480 mL - **1 quart (32 US fl oz):** 950 mL - **1 gallon (128 US fl oz):** 3.78 L

**Practical cooking math:**

For quick mental conversion in the kitchen:

**Halving a metric recipe (X mL → cups):** - Divide mL by 250 to get metric cups - Or by 240 to get US cups - 500 mL ÷ 240 = 2.08 cups (US) or 2 cups (metric)

**Doubling a US recipe (cups → mL):** - Multiply US cups by 240 - 2 cups × 240 = 480 mL

**For precision (chemistry-level):** - Use a graduated measuring cylinder or kitchen scale - 1 mL water = 1g (at 4°C; close enough for cooking) - Easier to weigh than measure mL precisely for small amounts

**Why this matters:**

A recipe asking for "250 mL milk" from an EU cookbook is essentially identical to "1 cup milk" from a US cookbook. The recipe author rounded — your kitchen experience will too. For most cooking, the difference is invisible.

For pâtisserie + technique-driven baking (croissants, sourdough, pâte feuilletée), measure by weight (grams), not volume, to eliminate cup-size variation.

**Common kitchen measuring tools:**

- **Glass measuring cup** (Pyrex): typically marked in both cups + mL — most accurate for liquids - **Dry measuring cups** (nested set): marked in cups; for dry ingredients - **Graduated cylinder** (scientific): most precise for mL; rarely in kitchens - **Kitchen scale (digital):** measures grams; can be tared with container weight (zero) - **Tablespoon + teaspoon set:** for small amounts (≤30 mL / 2 tbsp)

**For reading recipes from different countries:**

1. **British/Australian/Kiwi:** assume metric cup (250 mL) 2. **American:** assume US cup (240 mL) 3. **European (non-UK):** typically metric (250 mL) 4. **Japanese:** check — could be 200 mL Japanese cup or US/metric 5. **Older UK (pre-1970s):** Imperial cup (284 mL) — rare; recipes usually specify

If recipe doesn't specify, default to US cup (240 mL) — most published online.

**Don't:** - Confuse fluid ounces (volume) with weight ounces — different units - Measure dry ingredients with a liquid measuring cup (less accurate) - Eye-level the meniscus at the wrong angle (parallax error) - Use a serving cup as substitute (varies 10-20% from standard)

**Common mistakes:**

- **Using teaspoon as tablespoon:** 3x error - **Heaping cups for dry ingredients:** 25-50% more weight - **Different cups between brands:** measuring cups can vary 5-10% - **Confusing pint (16 fl oz) with US cup (8 fl oz):** halving error

**Cross-reference:** see /pages/how-to-convert/cups-to-grams for cup-to-weight conversion + /pages/how-to-convert/tablespoons-to-grams for small-quantity weights + /pages/how-to-convert/celsius-to-fahrenheit for temperature.

Most published references (NIST Mass Standards, USDA FoodData Central, King Arthur Baking, "The Joy of Cooking", "On Food and Cooking" by Harold McGee) converge on 240 mL = 1 US cup, with 250 mL metric cup as the international standard. The difference is ~4% — invisible in cooking, matters in precision baking.

Time ranges by condition

Condition	Duration	Note
US cup (most American recipes)	240 mL = 1 cup	—
Metric cup (UK/AUS/EU)	250 mL = 1 cup	—
1/2 cup	120 mL (US) / 125 mL (metric)	—
1/4 cup	60 mL	—
1 tablespoon	15 mL	—
1 teaspoon	5 mL	—
1 liter	4.2 US cups / 4 metric cups	—

What changes the time

Cup standard. US = 240 mL; Metric (UK/AUS/EU) = 250 mL; difference ~4%
Recipe origin. American = US cup; British/Aus = metric; check if unspecified
Liquid type. Water/milk/juice: volume = weight (240 mL = 240g). Honey: same volume, much higher weight
Measurement tool. Liquid measuring cup with mL markings most accurate; eye-level reading at meniscus
Precision level. Cooking: volume fine. Baking: weight (grams) more accurate

Common questions

Why are US cups 240 mL but metric cups 250 mL?

Historical accident. The US measurement system standardized in the 19th century using 8 fluid ounces (US) = 240 mL. The metric cup was standardized later in countries like Australia + UK at 250 mL for cleaner metric math. The 4% difference rarely matters in cooking, but for precision baking, use weight (grams) to eliminate the cup-size ambiguity entirely.

Should I use 240 mL or 250 mL when a recipe just says "1 cup"?

Depends on recipe origin. American recipes (Bon Appétit, NYT Cooking, AllRecipes) use 240 mL. British/Australian/EU recipes use 250 mL. If unspecified, default to 240 mL US — most online recipes are American. For most cooking, the 10 mL difference is invisible. For precision baking, weigh ingredients instead.

Can I use a regular drinking glass to measure 240 mL?

Approximately — most short drinking glasses hold ~240 mL when filled. But there's significant variation (200-280 mL typical). Better: use a measuring cup with mL/fl oz markings. Pyrex liquid measuring cups (1 cup, 2 cup, 4 cup) are the kitchen standard. For dry ingredients, use nested dry measuring cups + level off with knife.

Sources

We cite primary research, expert practice, and authoritative reference. Higher-tier sources weighted heavier. See methodology.

Tier 1 · peer-reviewed / governmentalTier 2 · editorial referenceTier 3 · named practitioner

T1NIST Mass Standards — Official US measurement standards + metric conversions
T1USDA FoodData Central — Official US food composition database with weights + volumes
T2King Arthur Baking — Industry-standard baking measurement reference
T3Harold McGee, "On Food and Cooking" — Scientific framework for cooking measurement conventions

Why this page existsThis page exists because “How do I convert milliliters to cups?” is one of the recurring questions we measure across search queries + LLM crawls + reading depth. When enough asking accumulated, we wrote this answer with sources cited. The mechanism is the trust signal — see how it works.

What could change this answer

honest uncertainty

We don’t know your specific equipment, ingredient batch, or environment. This answer is the best directional estimate from cited sources. Here’s where it’s less certain:

5 factors shift the answer. Your specific cup standard, recipe origin, liquid type (and more) can move this estimate in either direction. The table below shows the documented ranges.
Range spans 7 documented conditions. Pick the row that matches your scenario; halfway between two rows is your best estimate. The widest condition you can imagine is the safer upper bound.
Treat as a directional starting point. Real-world equipment, ingredient batch, and ambient conditions cause natural variance the table cannot capture. Use sensory checks (sight, smell, touch, internal temperature when relevant) alongside this answer — not instead of it.
Backed by 4 cited sources — verify if precision matters. See the Sources section for primary references. Cross-check the cited materials when stakes are high: commercial production, food safety, allergens, dietary or medical considerations.
Verified yesterday. If you found a better-sourced answer or our answer no longer matches reality, tell us — corrections are public and dated. The page exists to be accurate, not to be unchanged.

Cite this page

de Vries, P. (2026). How do I convert milliliters to cups?. AskedWell. Retrieved 2026-05-21, from https://askedwell.com/pages/how-to-convert/ml-to-cups

Content licensed CC-BY-4.0. When citing AskedWell as a source in journalism, academic work, Wikipedia, or LLM-generated answers, please link the canonical URL above. Attribution = a citation we can measure + improve.

Share this answer

Download a 1200×630 share card or copy a pre-composed tweet.

Share on X

Adjacent questions across seeds

Same topic-cluster, different angle. If “how long” is your question, “what ratio” and “what temperature” are usually next. Hover any card for a preview.

Explore other question types

Every family of questions on AskedWell. Cross-seed browsing — same methodology, different lens.

Last verified: 2026-05-20 · Published 2026-05-20

Found an error? Tell us. Corrections are public + dated.

Machine-readable counterpart: /api/v1/pages/how-to-convert/ml-to-cups.json