Tools · Batch calculator

How much water, how many cubes.

Pick a method and how much rice you want to use. The numbers come from the ratios in our three recipes and nothing else.

Method
Water to add
2 cups (about 475 ml)
Rice water you'll get
About 2 cups (about 475 ml)
Ice cubes
About 16 cubes
How long that lasts
At one cube a session, about 16 sessions.

Yields are approximate. Rice soaks up some water and a simmering pot loses some as steam, so expect a little less than the water you put in.

The rules it uses

MethodRiceWaterYield as writtenFrom
Soaked½ cup2 cupsAbout 2 cups, about 16 cubesSoaked recipe
Boiled½ cup2 to 3 cupsAbout 2 cups, about 16 cubesBoiled recipe
Fermented½ cup2 cupsAbout 2 cups, about 16 cubesFermented recipe
  • Water is four times the rice by volume. For the boiled method the recipe allows up to six times, because a pot at a simmer loses water; the calculator shows that range.
  • Yield is taken as four times the rice by volume, which is the figure our recipes give (½ cup of rice, about 2 cups). It is the recipes' own estimate, not a measurement, and the real amount will be somewhat less.
  • Cubes are the yield divided by your cube size. Our recipes assume 2 tablespoons a cube, which is how 2 cups comes to about 16 cubes. Trays vary, so pick the size closest to yours, or measure one compartment with a tablespoon of water.
  • Conversions: 1 US cup is 16 tablespoons, or about 237 ml.

What it can't tell you

  • It works in cups because the recipes do. We haven't published gram weights and won't guess them.
  • These are our recipes' ratios, not tested optimums. No study has compared rice-to-water ratios for skin; see the gaps in the evidence register.
  • It doesn't know how long your batch keeps. For that, use the use-by helper, and make the smallest batch that suits you: a refrigerated jar gets 48 hours under the rule we borrow.

What you choose here stays in your browser. Nothing is sent or stored.