Grain-to-Water Ratio Calculator
Find the correct water-to-grain ratio for rice, quinoa, oats, barley, millet, and farro.
Get exact water amounts and stovetop cooking times by grain type.
The Grain-to-Water Ratio determines how much water you need to properly cook grains. Too little water and grains stay hard. Too much and they become mushy.
Formula: Water needed = Grain amount × Water ratio
Standard Ratios (Grain : Water):
| Grain | Ratio | Cook Time | Yield |
|---|---|---|---|
| White rice (long grain) | 1 : 1.5 | 15–18 min | 3x |
| White rice (short grain) | 1 : 1.25 | 15–18 min | 2.5x |
| Brown rice | 1 : 2.5 | 40–50 min | 3x |
| Basmati rice | 1 : 1.5 | 15–20 min | 3x |
| Jasmine rice | 1 : 1.25 | 12–15 min | 2.5x |
| Wild rice | 1 : 3 | 45–55 min | 3.5x |
| Quinoa | 1 : 2 | 15–20 min | 3x |
| Rolled oats | 1 : 2 | 5–10 min | 2x |
| Steel-cut oats | 1 : 3 | 20–30 min | 3.5x |
| Pearl barley | 1 : 3 | 30–40 min | 3.5x |
| Bulgur wheat | 1 : 2 | 10–15 min | 3x |
| Couscous | 1 : 1.5 | 5 min (steep) | 2.5x |
| Farro | 1 : 2.5 | 25–35 min | 3x |
| Millet | 1 : 2.5 | 20–25 min | 3.5x |
| Polenta/Cornmeal | 1 : 4 | 25–35 min | 4x |
Measurement Units: Ratios work with any unit — cups, grams, or ounces — as long as both grain and water use the same unit. For precision: 1 cup of dry rice weighs approximately 185 g (6.5 oz). 1 cup of water weighs 237 g (8.4 oz).
Practical Example: To cook 2 cups of brown rice: 2 cups × 2.5 = 5 cups of water. The yield will be about 6 cups of cooked rice (2 × 3x yield factor).
Altitude Adjustment: At high altitudes (above 3,000 ft / 900 m), water boils at a lower temperature. Add approximately 2–4 tablespoons extra water per cup of grain and increase cooking time by 3–5 minutes.
Tips:
- Rinsing rice before cooking removes excess starch and prevents stickiness.
- Let grains rest (covered, off heat) for 5–10 minutes after cooking for better texture.
- For meal prep, cooked grains store well in the refrigerator for 4–5 days.
- A rice cooker uses slightly less water than stovetop methods because less steam escapes.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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