Ever stood in the kitchen holding a measuring jug marked in ml, reading a recipe that wants “3/4 cup of milk”? You’re not alone, and the conversion isn’t as clean as you’d hope. A cup isn’t one fixed size worldwide. This tool sorts that out and updates the moment you type.
The American standard is the one most recipes assume. One US cup is 236.588 ml, so flipping it gives you 1 ml = 0.00422675 cups. That means 250 ml is about 1.06 US cups, and a full liter is roughly 4.23 cups. Handy when your jug only shows metric and the recipe only shows cups.
The cup that isn’t a cup
Here’s where people get burned. There’s more than one “cup.”
- US cup: 236.588 ml. The default for American recipes and most online recipe sites.
- Metric cup: 250 ml. Standard in Australia, New Zealand, and a lot of countries that went metric from scratch. Also common on European measuring cups.
- UK legacy cup: around 284 ml. Old British imperial cups, found only in very old cookbooks.
The gap between a US cup and a metric cup is about 5.6%. For a cup of broth in a soup, nobody will notice. For baking, where ratios decide whether your cake rises, that drift adds up fast across multiple cups. The converter lets you pick which cup standard you’re targeting so a recipe written in one converts cleanly to the other.
Quick numbers worth knowing
A few conversions come up over and over in the kitchen:
- 250 ml = 1.06 US cups (or exactly 1 metric cup)
- 500 ml = 2.11 US cups
- 125 ml = about 1/2 US cup
- 60 ml = 1/4 US cup (4 tablespoons)
- 15 ml = 1 tablespoon
That 250 ml line is the one that trips everyone. On a metric cup it’s exactly one. On the US scale it’s a touch over. Small, but real.
How to use it
Punch your milliliter value into the input and the cup result shows instantly. There’s a toggle for US versus metric cups so you match whatever your recipe expects. The reference table below has the common ml amounts (60, 125, 250, 500, 750, 1000) already converted, so for standard measures you can just read it off. All the math runs in your browser. Nothing you type leaves your device, and it works offline once loaded.
One honest caveat: this converts volume to volume. It can’t turn 200 ml of flour into grams, since that depends on the ingredient’s density, so weigh dry baking ingredients for accuracy. But when a recipe gives you milliliters and your tools speak cups (or the reverse), this is exactly the tool you want.
Common questions
Is 250 ml one cup?
It’s exactly one metric cup. On the US scale, 250 ml is about 1.06 cups, slightly more than one. Which answer is “right” depends on which cup your recipe means.
How many ml in a US cup?
236.588 ml. The metric cup is 250 ml, and the old UK imperial cup was roughly 284 ml. This tool uses the exact figures, not rounded ones.
Why are US and metric cups different sizes?
The US cup descends from an older measure tied to 8 fluid ounces. Metric countries defined a clean 250 ml cup when they standardized. There was never a global agreement to merge them.
Can I convert ml to cups for dry ingredients like flour?
For volume, yes, a cup is always 236.588 ml whether it holds flour or water. But cups-to-grams for dry goods needs the ingredient’s density, which this volume converter doesn’t cover. Weigh dry ingredients for accuracy.
Does this work without internet?
Yep. It’s pure browser math with a fixed conversion factor, so it runs offline after the page loads and never uploads what you enter.