Milliliters to cups converter

Three cups walk into a bar

The word "cup" means three different volumes depending on context. US customary cup = 237 ml (often rounded to 240). Metric cup (Australian, Canadian, European) = 250 ml. UK imperial cup = 284 ml. This is a 20% spread. A recipe calling for "1 cup milk" made with 284 ml instead of 237 ml adds 19% more liquid — a disaster in cake batter.

Most American recipes use 240 ml as "1 cup" (the rounded metric equivalent). Most European recipes assume 250 ml. UK recipes are rare in volumes and typically use grams/ml instead. Identify the recipe's country of origin before converting.

The conversion table

• 1 US cup = 237 ml (240 rounded)
• 1 metric cup = 250 ml
• 1 UK cup = 284 ml (rarely used)
• 1/4 cup (US) = 60 ml
• 1/3 cup (US) = 80 ml
• 1/2 cup (US) = 120 ml
• 2/3 cup (US) = 160 ml
• 3/4 cup (US) = 180 ml
• 1 cup (US) = 240 ml
• 2 cups = 475 ml = 1 pint (US)
• 4 cups = 950 ml ≈ 1 liter

The simplest mental model

1 cup ≈ 240 ml. 250 ml ≈ 1 cup + 2 teaspoons. 500 ml ≈ 2 cups + 1 tablespoon. 1 liter ≈ 4 cups + 1 tablespoon. For cooking precision this is fine. For baking precision use the exact numbers and weigh liquids above 100 ml (a scale reads 1 ml resolution; measuring cups are ±5% accuracy at best).

When 250 vs. 240 actually matters

In a cake recipe calling for "3 cups flour + 1 cup milk" as a US recipe (so 375g flour + 240 ml milk): making it with metric 250 ml cups gives 240g flour + 250 ml milk. Hydration changes from 64% to 104%. You just made a batter instead of a dough. The cake turns out radically different.

When in doubt, check for a "Metric" toggle on the online recipe; most modern food sites have them. Or assume US customary unless the author explicitly states otherwise.

Liquids vs. solids measured in cups

A cup of liquid and a cup of flour are measured differently. Liquids use a transparent measuring cup with volume markings — you fill to the line, read at eye level. Flour uses a nested measuring cup — you fill to the top and level.

BUT: liquid measuring cups have a meniscus. Water in a glass cup bows upward at the edges (meniscus pulls up). Reading from above shows water "higher" than it is. Read at eye level, looking at the bottom of the meniscus.

Nested measuring cups for flour are scooped or spooned full, leveled across the top with a straight knife. See cups to grams for density-based accuracy on flour.

Metric cups in specific cuisines

• Australian recipes (Donna Hay, Stephanie Alexander): 250 ml cup; 20 ml tablespoon. Adjust down when converting to US.
• Canadian recipes: officially metric but many still use US cups. Check.
• Japanese recipes: 200 ml "rice cup" (specifically for rice cookers). A Japanese "1 cup rice" is 180g dry = 200 ml. Do not confuse with US cups.
• German, French, Italian: weight (grams) or ml exclusively. "Cup" rarely appears. If it does, assume 250 ml.

Why liquids in recipes often have ml AND cups

Good modern cookbooks list both ("1 cup / 240 ml"). If the numbers don't match up ("1 cup / 250 ml" — hint, metric cups), the author is using metric conventions. If they list "1 cup / 240 ml" they're US. Some authors (Samin Nosrat, Kenji Lopez-Alt) list both cups AND grams/ml AND %— the most accurate approach.

Small-quantity conversions for spice/flavor

• 1 tsp = 5 ml (globally)
• 1 tbsp = 15 ml (US/UK/Canada) or 20 ml (Australia)
• 1 fl oz = 30 ml (rounded; exact is 29.57 ml)
• A splash = ~5 ml
• A pinch = 0.3 ml (about 1/16 tsp)
• A dash = 0.6 ml (1/8 tsp)

Large-batch scaling (beyond cups)

When recipes scale above 10 cups or 2 liters, use weight. Volume measurement error compounds at scale. A 10-cup batch measured at ±5% accuracy each time is cumulatively off by 15-20% from exact. The same batch weighed in grams is off by < 1%.

For large-batch cooking (events, canning, brewing), see gallons to liters for the quart/pint/gallon/liter matrix.

When precision is optional

Soups, stews, braises, chilis, sauces for pasta: forgive ±10-15% in liquid measurements. The stew that calls for "4 cups stock" is fine with anything from 3 to 4.5 cups. Savory cooking is forgiving. Reserve the precision obsession for baking, pastry, and anything with leavening.

The metric-US conversion workflow

1. Weigh if possible. Liquids at 1 ml/g for water-density.
2. If a recipe gives both cups and ml/g, trust the ml/g.
3. If a recipe gives only cups with no origin indicator, assume US customary.
4. If the recipe is obviously non-American (written in British English, uses unfamiliar ingredients, no "add salt and pepper"), assume metric cups (250 ml) or weight.
5. When in doubt on critical recipes (cakes, breads), verify by searching the recipe title + "grams" — someone's probably converted it.

Related: cups to grams, oz to ml, gallons to liters, tablespoons to teaspoons.

What to put in your scale display

Set your kitchen scale default to grams + ml (most digital scales have both). Stop measuring by cup altogether for baking. For savory cooking, cups are fine. The dual-system approach means you can follow any recipe from any country without a conversion chart.

Worked conversions for three common recipes

French vinaigrette: 60 ml olive oil + 15 ml red wine vinegar + 5 ml Dijon. In US cups: 1/4 cup oil + 1 tbsp vinegar + 1 tsp mustard. The 60 ml – 59 ml (actual 1/4 cup US) gap is 1 ml — a drop. Ignore.

Japanese rice: 360 ml short-grain rice + 400 ml water. US cups: 1.5 cups rice + 1.67 cups water. But Japanese rice cookers use the "rice cup" (180 ml, not 240 ml) — 2 rice cups + the 2-line on the pot, done. Third: Italian espresso ristretto = 15 ml. That's 0.5 oz or 1 tablespoon. US "shot glass" is 44 ml (1.5 oz) = triple a ristretto. Bartenders who don't know this over-pour cocktails by 300%.

Measuring tools worth owning

• Pyrex 2-cup liquid measure ($8): Etched ml and oz on opposite sides. Read at eye level, not from above — parallax errors add 10 ml.
• OXO angled measuring cup ($12): Read the ml from directly above. Diabetics and bakers swear by it.
• Cocktail jigger, dual 15/30 ml ($10): Japanese-style, for bartending precision.
• Graduated cylinder 100 ml ($6): For when ±1 ml matters — tempering chocolate, making curd, calibrating espresso puck prep.
• Digital scale in ml mode: For water-based liquids (1 g = 1 ml), a scale beats any cup. For oil (0.92 g/ml) or honey (1.42 g/ml), you need the ml-specific tool.

Common conversion points to memorize

Frequently asked questions

Is 1 cup 240 ml or 250 ml? US = 236.6 ml (rounded to 240). Metric = 250 ml. Use the recipe's country of origin. Americans baking from Ottolenghi should use 250 ml. Brits using Ina Garten should use 240.

Do liquid and dry cups measure the same? Volume, yes — both are 240 ml. Shape differs: liquid cups have a spout and headroom (fill to the line), dry cups are level-filled. Using a liquid cup for flour under-measures; using a dry cup for milk over-measures from meniscus confusion.

How do I measure 15 ml without a spoon? A US tablespoon is 14.79 ml. A "heaped" dinner spoon holds 15-18 ml. Three teaspoons = 1 tablespoon. A standard medicine dropper is 1 ml per drop.

Why are UK recipes in ml not cups? The UK adopted metric for food labeling in 1995. Cups were never standardized in Britain — "teacup" and "breakfast cup" meant different volumes. Modern UK cookbooks use grams and ml exclusively.

Is 1 fl oz the same as 1 oz by weight? Only for water. 1 fl oz water = 1 oz weight = 28.35 g. Oil is 0.92 g/ml, so 1 fl oz oil = 27.2 g. Honey 1.42 g/ml, so 1 fl oz honey = 42 g. Don't substitute.

How do I convert "a splash"? In bartending, a splash = 1/8 to 1/4 oz (3.7 to 7.4 ml). "A dash" = 0.6 ml (6 drops from a bitters bottle). "A barspoon" = 5 ml. These are unofficial but consistent in craft cocktail bars.

What's a metric tablespoon? Australia = 20 ml. Rest of world = 15 ml. Australian recipes saying "1 tbsp vanilla" mean 20 ml — 33% more than US. Check origin country.

Can I use a syringe for ml? Yes — an oral medication syringe (pharmacy, $2) measures 1-10 ml in 0.1 ml gradations. Essential for infant formula, tincture dosing, and cocktail bitters precision.

Why does my Pyrex measure say 250 ml at 1 cup? Pyrex sold in Europe prints metric cups. Pyrex sold in US prints US customary. Read the small print on the bottom — "US" vs "Euro" is marked.