Food & Cooking

Rice Water Ratio Calculator

What this does

Get perfect cooking water amounts for white, brown, jasmine or sushi rice by cups or milliliters.

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Calculator inputs

How to use it

Using the rice water ratio calculator

  1. 01

    Measure the dry rice

    Use a proper dry measuring cup and level it off; heaped cups skew the ratio fast.

  2. 02

    Match the type

    Select the variety you are actually cooking; jasmine needs noticeably less water than brown.

  3. 03

    Add and rest

    Bring to a boil, cover on the lowest heat for the usual time, then rest 10 minutes off-heat before fluffing.

Good to know

Why types disagree

Bran layers make brown rice dense and slow-drinking, demanding double its volume; polished sushi rice keeps a surface starch film that turns mushy past 1:1.1. Jasmine sits between; its lower ratio preserves separate, fragrant grains instead of porridge.

The lid matters more than the number

Absorption math assumes steam stays put. A leaking lid quietly deletes water from your equation, producing crunchy centers no ratio could fix. If results vary pot to pot, suspect the seal before the measurement.

Rinsing shifts the balance

Rinsing removes loose surface starch; good for texture; and wets the grain. Many cooks shave 5% off the water after rinsing; the note row reminds you where that lever lives.

How it's calculated

The math behind this calculator

Water(cups) = Rice(cups) × Type ratio Water(ml) = Water(cups) × 237

Each rice variety has a conventional absorption ratio: long-grain white 1:1.5, brown 1:2, jasmine 1:1.25 and sushi-style short grain 1:1.1. Multiply your measured rice by the matching factor; milliliters follow at 237 ml per US cup.

Assumptions & limitations

  • Standard US 240 ml measuring cup taken as 237 ml.
  • Stovetop absorption method with a tight lid; pasta-method boiling needs far more water.
  • Slightly less water compensates for rinsed rice’s surface moisture loss.

Worked example

Two cups of brown rice absorb twice their volume: 4 cups of water, which is 948 ml on a scale or filling line.

FAQ

Frequently asked questions

Does the rice cooker line match these ratios?
Close; cooker lines assume the included cup (≈180 ml). Use the same cup end to end or measure both by weight instead.
Why is brown rice 1:2?
The intact bran absorbs more water and cooks slower, so brown needs double volume plus a longer simmer than white.
Can I halve the recipe?
Yes; ratios scale linearly, though very small batches evaporate proportionally more; add a splash if using under one cup.
Should I salt the water?
A pinch dissolved into the measured water seasons evenly without disturbing the ratio’s volume.

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