Here’s where it gets a little nerdy, but stay with me. The liter is a metric unit, based on the cubic decimeter. A cup, on the other hand, is a historic holdover from the British imperial system. They don’t “fit” together perfectly, which is why you get weird decimals. But that awkwardness is what makes cooking international so fascinating.
If you ever need to convert in your head, remember this: 1 cup is roughly a quarter of a liter. So ¾ cup is a little more than a sixth of a liter. Close enough for soup, right? Exact math is for scientists; we’re just hungry.
Real-world hacks you’ll actually use
Say you’re making a dressing: olive oil, vinegar, a splash of lemon. Recipe says ¾ cup of oil. You grab a liter bottle of olive oil. Do you need to measure it properly? Not with this trick: just pour until the glass is ¾ full of a standard cup—that’s 0.177 liters. Or, if you have a 500 ml bottle, you’re filling it one third of the way. Easy.
How To Measure 2 3 Cups Without Measuring Cup | Detroit Chinatown
Another hack: use your fist. A closed fist is roughly the size of a cup (about 250 ml). So ¾ of your fist volume is close to 0.18 liters. Not precise, but perfect for when you’re too lazy to wash a measuring cup—which is, let’s be real, most of the time.
