About this tool
Rice & Grain Water Ratio Calculator is a free, in-browser tool that tells you how much water to use for rice and other grains, how long to cook them, and how much cooked food you will get. Choose a grain, enter how many dry cups you are cooking, and it returns the water, time and yield. Everything runs in your browser and nothing is uploaded.
Each grain carries a water-to-grain ratio, a typical simmer time and an expansion factor: water (cups) = dry × ratio and cooked yield (cups) = dry × expansion. Presets follow common stovetop guidance — white rice 2:1 (18 min, ×3), basmati and jasmine 1.5:1 (15 min, ×3), brown rice 2.5:1 (45 min, ×3), wild rice 3:1 (45 min, ×3.5), quinoa 2:1 (15 min, ×3), steel-cut oats 3:1 (25 min, ×3) and pearl barley 3:1 (40 min, ×3.5).
Use it to scale a pot to the number of servings you need, or to avoid mushy or undercooked grains from guessing the water. Times assume a covered simmer over low heat; rinse rice first and let it rest a few minutes off the heat before fluffing.