I have used two different rice cooker measuring cups, and I know the kitchen scale is correct, but the rice packaging for various rices say 45g = 1/4 cup, but if I fill it up to 1/4 cup, the weight of the rice turns out to be 30g. What am I doing wrong? I even put a little more than 1/4 cup but still it's like 32-33g. I know different grains weight different, but I think 15g off is too much right?

  • If the rice package don't come with a cup use weight not "cups". How the hell they would now what cup you're using? How you would know what they used? Commented Apr 28, 2020 at 7:34

1 Answer 1


The measuring cups that come with rice cookers are not the same size as a US cup (or indeed many other countries' cup measurements).

A rice cooker cup is 180 ml, a US cup 240ml, and in a lot of places it's 250ml. This is because rice cooker designs originate from Japan.

You're getting 30g, which is 2/3 of what you expect. For a US cup, 3/4 would be right, and for a 250 ml cup, 72%. That's probably close enough given how much variability there is in packing rice into a cup, especially as grain shapes vary.

  • I just did a bit of empirical testing. My rice cooker cup measures 35g for 1/4 cup. My American cup measures 45g for 1/4 cup.
    – Spagirl
    Commented Apr 28, 2020 at 20:16

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.