Rice Calculator — Water Ratio, Yield & Servings
Calculate the perfect rice-to-water ratio, dry-to-cooked yield, and exact servings for any rice type. Covers white, brown, basmati, jasmine, sushi, wild rice and more — absorption method and rice cooker modes.
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Sources & Methodology
How We Calculate Rice-to-Water Ratios
Every rice-to-water ratio on this page is sourced from USDA nutritional data, manufacturer specifications from major rice brands (Lundberg Family Farms, Kokuho Rose, Royal Basmati), and the International Rice Research Institute (IRRI). Ratios reflect the absorption method — where all water is absorbed during cooking with a tight-fitting lid. Yield multipliers are calculated from the USDA nutrient database comparing 100g raw to cooked weight per rice variety.
- USDA FoodData Central — Raw and cooked weight data for all rice varieties
- International Rice Research Institute (IRRI) — Grain quality and water absorption standards
- Lundberg Family Farms / Kokuho Rose / Royal Basmati — Brand-specific cooking instruction verification
- FDA / USDA Food Safety — Safe storage temperatures and times for cooked rice
Complete Rice Cooking Guide
Rice-to-Water Ratio Guide: Every Type, Every Method
Getting rice right depends entirely on the ratio of water to rice and how well you control heat. The rice-to-water ratio is not one-size-fits-all — white rice, brown rice, jasmine, basmati, sushi rice, and wild rice each have different starch structures and water absorption rates. Use the wrong ratio and you end up with crunchy undercooked grains or a gummy, waterlogged mess. This guide covers every ratio, every method, and every question you have about cooking rice perfectly.
The Standard Rice-to-Water Ratio Chart by Type
The following ratios are for the absorption method on the stovetop — the most common home cooking technique where all the water is absorbed by the rice. Add rice and cold water to a pot, bring to a boil, reduce to the lowest simmer, cover tightly, and cook for the time listed. Never lift the lid during cooking.
| Rice Type | Ratio (Rice:Water) | Cook Time | Yield (1 cup dry) | Notes |
|---|---|---|---|---|
| Long-grain white | 1 : 2 | 18 min | 3 cups cooked | Most common; rinse optional |
| Jasmine rice | 1 : 1.5 | 15–18 min | 3 cups cooked | Always rinse; naturally fragrant |
| Basmati rice | 1 : 1.5 | 15 min | 3 cups cooked | Rinse + soak 20–30 min for best results |
| Brown rice | 1 : 2.5 | 40–45 min | 2.5 cups cooked | Bran layer needs more water and time |
| Sushi rice | 1 : 1.25 | 15 min + 10 rest | 2.5 cups cooked | Season with rice vinegar after cooking |
| Wild rice | 1 : 3 | 45–60 min | 3–4 cups cooked | Technically a grass seed; chewy texture |
| Arborio (risotto) | 1 : 3–4* | 18–20 min | 3 cups cooked | *Add stock gradually, stir constantly |
| Parboiled / converted | 1 : 2.25 | 20–25 min | 3 cups cooked | More forgiving; less sticky |
How Much Dry Rice Per Person? The Definitive Serving Guide
The most common question after the ratio is how much dry rice to measure per person. The answer depends on the meal context — rice as a side dish versus as the main carbohydrate source versus as a base for a rice bowl are three very different quantities.
| Meal Type | Dry Rice per Person | Dry Rice (grams) | Cooked Yield |
|---|---|---|---|
| Side dish | 1/4 cup | 45g | ~3/4 cup cooked |
| Main dish / rice bowl | 1/3 – 1/2 cup | 60–90g | 1 – 1.5 cups cooked |
| Fried rice | 1/3 – 1/2 cup | 60–90g | 1 – 1.5 cups cooked |
| Sushi (2–3 rolls) | 1/2 cup | 90g | 1.25 cups seasoned |
| Biryani / pilaf | 1/3 – 1/2 cup | 60–90g | 1 – 1.5 cups cooked |
| Congee / rice porridge | 1/8 – 1/4 cup | 25–45g | 1.5 – 2 cups cooked (very soft) |
Uncooked Rice to Cooked Rice: Weight and Volume Conversion
Understanding how much cooked rice you get from a given amount of dry rice is essential for meal prep, catering, and recipe scaling. Rice gains weight during cooking because it absorbs water. White rice approximately triples in both volume and weight. Here is the full breakdown for the most searched rice conversion queries:
White rice: Cooked weight = Dry weight x 3.0
Brown rice: Cooked weight = Dry weight x 2.8
Wild rice: Cooked weight = Dry weight x 3.5
Volume: 1 cup dry white rice → 3 cups cooked
Weight: 185g dry white rice → ~555g cooked
| Dry Rice | Cooked Volume (white) | Cooked Weight (white) | Approx. Servings (side) |
|---|---|---|---|
| 1/4 cup (45g) | 3/4 cup | ~135g | 1 person |
| 1/2 cup (90g) | 1.5 cups | ~270g | 2 people |
| 1 cup (185g) | 3 cups | ~555g | 4 people |
| 2 cups (370g) | 6 cups | ~1,110g | 8 people |
| 5 cups (925g) | 15 cups | ~2,775g | 20 people |
| 1 kg dry | ~16 cups | ~3,000g | ~22 people |
Why Rice-to-Water Ratio Matters: The Science
Rice cooking is a hydration and gelatinization process. Starch granules in the rice grain absorb water and swell, then gelatinize under heat, creating the soft, cooked texture we want. Too little water and the outer starch gelatinizes while the inner grain stays hard. Too much water and the grain over-hydrates, breaks down, and becomes mushy.
The ratio differences between rice types come from their starch composition. Long-grain rice (like basmati and jasmine) has more amylose starch, which absorbs water efficiently and produces fluffy, separate grains. Short-grain rice (like sushi rice and arborio) has more amylopectin starch, which produces a stickier, more cohesive texture. Brown rice has an intact bran layer that acts as a physical barrier to water absorption, requiring more water and longer cook time to fully hydrate the starchy endosperm.
Rice Cooker Ratios vs. Stovetop: What's Different
Rice cookers produce different results from stovetop cooking because they use a sealed, pressurized environment that traps steam. This means less water is lost to evaporation, so you need less water. Most rice cookers recommend a 1:1 to 1:1.1 rice-cooker-cup ratio for white rice — significantly less than the 1:2 stovetop ratio.
Critical note: rice cooker measuring cups hold 180ml, not 240ml like a standard US measuring cup. This is the most common source of rice cooker confusion. When a rice cooker says "2 cups of rice with water to the 2-cup line," it means two 180ml cups of rice with 360ml of water — not 480ml. Always use the cup that came with your rice cooker for accurate results.
How to Fix Common Rice Cooking Problems
Rice is mushy or watery: You used too much water, lifted the lid too early, or did not let the rice rest after cooking. Next time reduce water by 2 tablespoons per cup and keep the lid on for 5 additional minutes after heat is off.
Rice is crunchy or undercooked: Too little water, too high a heat, or too short a cooking time. Add 2–3 tablespoons of hot water, replace the lid, and cook on low heat for 5 more minutes. Or start over with more water and a longer simmer.
Rice is sticking to the pot: Either the heat was too high, you did not rinse the rice, or the pot does not have a thick enough base. Rinse rice before cooking to remove surface starch, use medium-low heat after boiling, and add 1/2 teaspoon of oil or butter to the water.
Rice is clumping together: This is normal for sushi rice and short-grain varieties — it is by design. For basmati or jasmine where separate grains are desired, rinse thoroughly, use the correct ratio, and fluff with a fork (not a spoon) after resting.
How to Store and Reheat Cooked Rice Safely
Cooked rice is a food safety risk many people underestimate. Bacillus cereus, a spore-forming bacterium that survives cooking, can germinate and produce toxins in rice left at room temperature. The USDA Food Safety guidelines require that cooked rice is cooled within 1 hour of cooking and refrigerated within 2 hours.
In the refrigerator: store in an airtight container for up to 3–5 days. In the freezer: portion into zip-lock bags or containers and freeze for up to 6 months. To reheat, add 1–2 tablespoons of water per cup of rice, cover with a damp paper towel, and microwave for 1–2 minutes. Alternatively, reheat in a covered pan on the stovetop with a splash of water until steaming throughout. Reheat to at least 165°F (74°C).
Frequently Asked Questions