Grains and grain-based staples vary a lot by how airy or dense their pieces are. The 3 ingredients in this category range from Oats (rolled) (90g per cup) to Rice (uncooked) (185g per cup) — more than double.
Grains in this group range from Oats (rolled) at 90g per cup to Rice (uncooked) at 185g per cup, because flaky, rolled pieces trap far more air than dense whole grains.
All three are measured the same basic way — scoop and settle — but their very different densities mean the same cup measurement represents very different weights.
How each grains ingredient converts at common gram amounts, lightest to heaviest.
| Ingredient | g / cup | 50g | 100g | 200g | 250g | 500g |
|---|---|---|---|---|---|---|
| Oats (rolled) | 90g | 0.56 cups | 1.11 cups | 2.22 cups | 2.78 cups | 5.56 cups |
| Breadcrumbs (dry) | 112g | 0.45 cups | 0.89 cups | 1.79 cups | 2.23 cups | 4.46 cups |
| Rice (uncooked) | 185g | 0.27 cups | 0.54 cups | 1.08 cups | 1.35 cups | 2.70 cups |
Open any ingredient for its full density breakdown, quick conversion table, and measuring tips.
All three grain-based ingredients here are measured the same straightforward way:
Scoop & Settle — Oats (rolled), Breadcrumbs (dry), Rice (uncooked)
Scoop or pour oats (rolled) into the measuring cup and gently shake to settle, then level the top. Don't press down — it settles naturally without packing.
Rolled oats are flattened and flaky, trapping far more air per cup than solid rice grains, which is the main reason oats are so much lighter.
Whole rice grains pack tightly with little space between them, while breadcrumbs are irregular and porous, landing in between oats and rice in weight.
Every conversion above uses the same data as the full calculator. Enter any gram amount for any ingredient in this category and get an instant cup conversion.
Use the Gram to Cup Calculator →100g of oats (rolled) is approximately 1.11 cups, based on a density of 90g per US cup.
100g of rice (uncooked) is approximately 0.54 cups, based on a density of 185g per US cup.
Rolled oats are flattened and flaky, trapping a lot of air between pieces, while uncooked rice grains are small and solid with little space between them — that's why oats weigh roughly half as much per cup as rice.
The values here are for the form listed on each ingredient page — rice, for example, is measured uncooked, since cooked rice absorbs water and weighs differently per cup.