WellByNumbers.

Rolled oats (dry) vs Buckwheat (cooked)

Both count toward 30 plants a week.

Rolled oats (dry)Buckwheat (cooked)
Protein · per 100 g13.5 g3.4 g
Carbs · per 100 g68.7 g19.9 g
Fat · per 100 g5.9 g0.6 g
Fiber · per 100 g10.1 g2.7 g
Energy · per 100 g379 kcal92.0 kcal
Protein · per 100 kcal3.6 g3.7 g
To hit 30 g protein222 g · 842 kcal888 g · 817 kcal

The same three numbers, drawn

Protein / 100 g13.53.4Fiber / 100 g10.12.7Protein / 100 kcal3.63.7Rolled oatsBuckwheat

What 30 g of protein looks like on a plate

222 gRolled oats842 kcal rides along888 gBuckwheat817 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 14%carbs 72%fat 14%
protein 14%carbs 81%6%

The one-line verdict: Buckwheat (cooked) delivers 1.0× the protein per calorie of Rolled oats (dry) (3.7 g vs 3.6 g per 100 kcal).

More protein / 100 g: Rolled oatsMore fiber / 100 g: Rolled oatsLighter per 100 g: BuckwheatSmaller 30 g portion: Rolled oats

Swap in your own pair

Bold marks the better side of each row. "Per 100 kcal" answers the density question — which food delivers more protein for the energy it costs. Portion row is computed live from the same USDA base values shown on each food page.