Grains, Rice & Seeds Grams to Cups Conversion Guide
Grains, legumes, and oilseeds vary widely in particle geometry, moisture content, and bulk density. 1 US cup of dry rolled oats weighs only 90g, while dense raw white rice weighs 185g, and dry chickpeas weigh 200g. Learn how to convert raw grains and seeds for bread, granola, and porridge recipes with complete scientific accuracy.
Understanding Grain & Seed Bulk Density in Baking
Bulk density measures the mass of granular solids divided by the total volume they occupy, including the air spaces between individual seeds or kernels. Coarse oat flakes leave large air voids, resulting in a low density of 90g per US cup. Small spherical seeds like chia (160g/cup) or raw quinoa (170g/cup) pack far more tightly into measuring vessels.
Furthermore, raw grains absorb up to 2.5 to 3 times their weight in water during boiling or baking. Measuring uncooked grains by weight before liquid addition is the only way to ensure reliable culinary outcomes.
Instant Grain & Seed Grams to Cups Calculator
Convert oats, rice, quinoa, chia seeds, and legumes instantly with verified test lab metrics.
Custom package weights override standard database densities for this session without altering official database records.
Master Grain, Legume & Seed Density Table
Uncooked weights for US Legal Cups (240ml), Metric Cups (250ml), and Imperial Cups (284ml).
| Grain / Seed Item | 1 US Cup (g) | Metric Cup (g) | Imperial Cup (g) | Category | Dedicated Guide | Reverse Tool |
|---|---|---|---|---|---|---|
| Rolled Oats (Old-Fashioned) | 90 g | 95 g | 108 g | grains-and-rice | Rolled Oats (Old-Fashioned) Chart→ | Cups to Grams→ |
| Quick-Cooking Oats | 85 g | 90 g | 102 g | grains-and-rice | Quick-Cooking Oats Chart→ | Cups to Grams→ |
| Uncooked White Rice | 185 g | 195 g | 222 g | grains-and-rice | Uncooked White Rice Chart→ | Cups to Grams→ |
| Uncooked Brown Rice | 190 g | 201 g | 228 g | grains-and-rice | Uncooked Brown Rice Chart→ | Cups to Grams→ |
| Uncooked Quinoa | 170 g | 180 g | 204 g | grains-and-rice | Uncooked Quinoa Chart→ | Cups to Grams→ |
| Yellow Cornmeal | 150 g | 159 g | 180 g | grains-and-rice | Yellow Cornmeal Chart→ | Cups to Grams→ |
| Polenta (Coarse) | 160 g | 169 g | 192 g | grains-and-rice | Polenta (Coarse) Chart→ | Cups to Grams→ |
| Lentils (Dry) | 192 g | 203 g | 231 g | legumes-and-pulses | Lentils (Dry) Chart→ | Cups to Grams→ |
| Dry Chickpeas (Garbanzo Beans) | 200 g | 211 g | 240 g | legumes-and-pulses | Dry Chickpeas (Garbanzo Beans) Chart→ | Cups to Grams→ |
| Chia Seeds | 160 g | 169 g | 192 g | nuts-and-seeds | Chia Seeds Chart→ | Cups to Grams→ |
| Flax Seeds (Whole) | 149 g | 157 g | 179 g | nuts-and-seeds | Flax Seeds (Whole) Chart→ | Cups to Grams→ |
| Sesame Seeds | 145 g | 153 g | 174 g | nuts-and-seeds | Sesame Seeds Chart→ | Cups to Grams→ |
| Sunflower Seeds (Shelled) | 128 g | 135 g | 154 g | nuts-and-seeds | Sunflower Seeds (Shelled) Chart→ | Cups to Grams→ |
| Pumpkin Seeds (Pepitas) | 113 g | 119 g | 136 g | nuts-and-seeds | Pumpkin Seeds (Pepitas) Chart→ | Cups to Grams→ |
Uncooked vs Cooked Grain Weight: Why Recipes Specify Raw
Recipe ingredient lists almost universally state raw or dry weights (e.g., "100g dry quinoa" or "1 cup rolled oats"). During hydration:
- White Rice: 1 cup raw (185g) yields approx 3 cups cooked rice (~500g).
- Rolled Oats: 1 cup raw (90g) yields approx 2 cups cooked oatmeal (~240g).
- Quinoa: 1 cup raw (170g) yields approx 3 cups cooked quinoa (~420g).
Always measure dry before boiling to prevent excess liquid absorption or underhydrated bakes.
Seeds in Baking, Tablespoon vs Cup Measurement
Because seeds (chia, flax, sesame, sunflower, pumpkin) are typically used in smaller quantities as bread toppings or egg replacement gels, recipes frequently call for tablespoons rather than full cups:
Popular Rolled Oats Grams to Cups
Specific volume conversion guides for dry rolled oats (USDA density: 90g / US cup):
Individual Grain, Rice & Seed Conversion Pages
Further Reading: Grain & Sourdough Guides
Baker's Percentages & Gram Weights
Master bread percentages: flour is always 100%, and liquids are scaled relative to flour.
Starter HydrationSourdough Starter Hydration Math
Why 100% sourdough starter hydration requires equal gram weights of water and flour.
Hygroscopic GrainsHow Humidity Shifts Grain Moisture
Grain flours absorb atmospheric water vapor, shifting dry weights on humid days.
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Free Calculator Embed Widget
Embed our interactive grams to cups baking converter on your food blog or recipe website.