Enter values to see results
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ml
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cups (240ml)
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: 1 water per gram rice
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g
Enter values to see results
—
ml
—
cups (240ml)
—
: 1 water per gram rice
—
g
The Rice to Water Ratio Calculator gives you the precise amount of water for any quantity of dry rice based on variety and cooking method. The water-to-rice ratio is the single most important variable in stovetop rice cooking — too little water results in undercooked, hard rice, while too much produces a soggy, sticky mass. Getting this ratio right is what separates reliably fluffy rice from the frustrating inconsistency many home cooks experience.
The ratios used in this calculator are based on well-established culinary standards and research into starch absorption in rice cooking. White long-grain rice and jasmine rice use a 1:1.5 ratio (1 part rice to 1.5 parts water). This ratio accounts for the water absorbed by the rice during cooking plus a small allowance for steam that escapes from even a well-covered pot. Basmati uses a slightly higher ratio of 1:1.75 because its extra-long grains require more water to hydrate fully. Brown rice, which retains its bran layer, needs 1:2.5 because the bran slows water absorption considerably and requires additional water to fully cook the starchy endosperm. Short-grain rice (sushi rice, Arborio) typically uses 1:1.5 for standard boiling.
The pasta method — boiling rice in a large excess of water and then draining — is an alternative approach that sidesteps the ratio question entirely. It treats rice like pasta: cook in ample salted water until al dente, then drain. This method sacrifices some of the starch (and thus some of the sticky, cohesive quality prized in Asian rice cookery) but is forgiving for cooks who struggle with precise absorption ratios. This calculator uses 5× water for the pasta method, which ensures complete submersion at any rice quantity.
These ratios apply to the absorption method — where the rice and measured water are placed in the pot together and all water is absorbed during cooking. For electric rice cookers, the ratios are the same but some cookers have their own cup markings that may differ from standard cups; always use the water line markings in your cooker as a final check against these calculated volumes.
Water (absorption method) = Dry rice (g) × Water ratio
Ratios: White/Jasmine = 1.5, Basmati = 1.75, Brown = 2.5, Short grain = 1.5
Water (pasta method) = Dry rice × 5.0 (large excess, all drained after cooking)
Cooked yield = Dry rice × Yield factor (White/Basmati/Jasmine = 3.0, Brown = 2.5, Short grain = 3.2)
Water volume is in milliliters (1 ml ≈ 1 g of water). The cups conversion uses 240 ml standard US cups. For the pasta method, use at least 5× the rice weight in water — the exact amount is not critical as it will all be drained away. Cooked yield is an approximation; actual yield varies by ±10% depending on pot type, heat level, and how tightly the lid fits.
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300 g white rice needs 450 ml (about 1.9 cups) water by the absorption method, yielding approximately 900 g cooked rice.
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150 g dry basmati needs 263 ml water — just over 1 cup — for perfectly fluffy grains by the absorption method.
A 1:2 ratio (1 cup rice to 2 cups water) is commonly cited but is actually slightly too much for most white rice varieties, which only need 1:1.5. The 1:2 ratio may originate from earlier recommendations or from pot types that allow more steam to escape. Brown rice does need a 1:2.5 ratio. For white rice, 1:1.5 consistently produces better, less soggy results.
Water ratios vary because of differences in rice variety, pot material, lid seal quality, altitude, and heat source. A heavy cast iron pot with a tight-fitting lid loses less steam than a thin pot with a loose lid, meaning it needs slightly less water. Ratios in cookbooks and on rice packages are general guides — this calculator provides ratios for the standard stovetop absorption method which may need minor tweaking for your specific pot.
1 cup of dry white rice weighs approximately 180–200 g depending on how it is packed. For a standard conversion, use 185 g per cup. 1 cup of water is 240 ml. So for 185 g rice using a 1:1.5 ratio, you need 277 ml (about 1.15 cups) of water.
Slightly. Rinsed and drained rice retains a small amount of surface water, which contributes to the cooking ratio. Some cooks reduce the measured water by 1–2 tablespoons when using rinsed rice. The effect is small enough that the standard ratios in this calculator work well regardless of whether the rice is rinsed, as the difference is within normal variation.
Yes, as a starting point. Most rice cookers also have water-level markings in the bowl which you should cross-reference. Rice cooker performance varies between models — sealed pressure rice cookers need slightly less water than open-steam designs. After your first batch, adjust up or down by 2 tablespoons if the result is too dry or too wet.
For very small quantities (less than 100 g dry rice), add an extra tablespoon or two of water beyond the calculated amount. Small quantities are more susceptible to evaporation relative to the total volume, so they can run dry before fully cooking. The error margin of the standard ratio is proportionally larger for small amounts.
Soaking rice (particularly basmati) before cooking partially hydrates the grains. After soaking, the total water needed during cooking can be reduced by approximately 10–15%. However, for simplicity and reliability, many cooks soak the rice and then use the standard ratio without adjustment — the results are still good.
Brown rice retains its bran layer (the fibrous outer coating of the grain). This layer acts as a barrier, significantly slowing the absorption of water into the starchy endosperm. More water is needed (2.5× vs 1.5× for white rice) and more cooking time (45 vs 18 minutes) to fully hydrate and cook the grain through this bran barrier.
Yes, notably. A thin stainless steel pot with a loose lid loses more steam than a heavy cast iron pot or one with a tight lid. If you find your rice consistently turns out dry with the standard ratio, add 2–3 tablespoons extra water. If it is consistently soggy, reduce by the same amount. The standard ratios here are calibrated for a mid-weight covered pot.
No significant difference in texture or taste has been demonstrated between tap water (of normal quality) and mineral water for rice cooking. The mineral content of water can have slight effects on flavor in theory, but in practice the difference is negligible compared to the quality of the rice itself and the cooking technique.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
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