Rice Calculator

Quick Answer

Last updated: 10 November 2026 ·How we calculate this: USA Rice Federation cooking ratios

How This Rice Calculator Works

Different kinds of rice absorb different amounts of water. Choose the type of rice, then either enter how much uncooked rice you have or how many people you are feeding. The calculator gives the water to add in cups and milliliters, the rice to water ratio, how much cooked rice you will get, how many half-cup servings that is, and the simmer time, using the USA Rice Federation’s stovetop chart.

How to Use the Rice Calculator

1. Choose the type of rice.
2. Choose whether you know the amount of rice or the number of people.
3. Enter cups of uncooked rice, or people and cooked cups per person.
4. Press Calculate.
5. Read the water amount, cooked yield and simmer time.

Rice to Water Ratios

• Water: cups of uncooked rice × the ratio for that rice
• Cooked rice: cups of uncooked rice × 3
• Rice for a group: people × cooked cups per person ÷ 3 = cups of uncooked rice
• Servings: cooked cups ÷ ½ cup (USDA MyPlate counts ½ cup cooked rice as 1 ounce-equivalent of grains)
• Metric: 1 US cup = 236.6 mL

Key Terms

• Rice to water ratio: the volume of water used for each volume of uncooked rice.
• Parboiled rice: rice partly boiled in the husk before milling.
• Long-grain rice: slender grains that cook up fluffy and separate.
• Short-grain rice: plump grains that cook soft and sticky.
• Ounce-equivalent: USDA serving unit for grains; ½ cup cooked rice is 1 ounce-equivalent.

Worked Example

You are cooking for 8 people and want ¾ cup of cooked rice each, using long-grain white rice.

• Cooked rice needed = 8 × 0.75 = 6 cups
• Uncooked rice = 6 ÷ 3 = 2 cups
• Water = 2 × 2 = 4 cups (946 mL)

For 2 cups of brown rice instead: 2 × 2¼ = 4.5 cups of water, simmered 40 to 45 minutes, making about 6 cups cooked.

Real-Life Examples

• Weeknight dinner: 1 cup of long-grain white rice needs 2 cups of water and makes about 3 cups.
• Brown rice: 2 cups need 4.5 cups of water.
• Parties: 8 people at ¾ cup each need 2 cups of uncooked rice.
• Risotto: arborio uses about 4 cups of liquid per cup, added a little at a time.

White Rice vs Brown Rice

• White rice: the bran is removed; cooks in 15 to 18 minutes with 2 cups of water per cup (long grain).
• Brown rice: keeps the bran layer, so it has more fiber; needs 2¼ cups of water and 40 to 45 minutes.
• Parboiled rice: partly cooked in the husk; firm, separate grains in about 20 minutes.

Rice Cooking Chart

From the USA Rice Federation’s stovetop chart.

Tips for Perfect Rice

Use a heavy pot with a tight lid that is big enough for the rice to triple. Bring the water (with a little salt and butter or oil if you like) to a boil, stir in the rice, cover, turn the heat to low and simmer for the time shown without lifting the lid. When the time is up, take the pot off the heat and let it stand covered for 5 to 10 minutes, then fluff with a fork.

Rinsing removes surface starch and gives fluffier, more separate grains; rinsed rice may need slightly less water because it is already damp. Older rice, high altitude and wide pans (more evaporation) can need a little more water. Rice cookers and Instant Pots often use closer to a 1:1 to 1:1.25 ratio for white rice because almost no water escapes; follow the maker’s lines.

Common Mistakes to Avoid

• Lifting the lid. Steam escapes and the rice cooks unevenly.
• Using one ratio for all rice. Brown, short-grain and arborio need different amounts.
• Using a stovetop ratio in a rice cooker. Cookers usually need less water.
• Skipping the rest. Standing time finishes the cooking.
• Using a pot that is too small. Rice triples in volume.

Frequently Asked Questions

References & Sources