WellByNumbers.

Blackberries (raw) vs Blueberries

Both count toward 30 plants a week.

Blackberries (raw)Blueberries
Protein · per 100 g1.5 g0.7 g
Carbs · per 100 g9.6 g14.6 g
Fat · per 100 g0.5 g0.3 g
Fiber · per 100 g5.3 g2.4 g
Energy · per 100 g43 kcal57 kcal
Protein · per 100 kcal3.6 g1.2 g
To hit 30 g protein1961 g · 843 kcal4286 g · 2443 kcal

The same three numbers, drawn

Protein / 100 g1.50.7Fiber / 100 g5.32.4Protein / 100 kcal3.61.2BlackberriesBlueberries

What 30 g of protein looks like on a plate

1961 gBlackberries843 kcal rides along4286 gBlueberries2443 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 12%carbs 78%fat 9%
4%carbs 91%4%

The one-line verdict: Blackberries (raw) delivers 2.9× the protein per calorie of Blueberries (3.6 g vs 1.2 g per 100 kcal).

More protein / 100 g: BlackberriesMore fiber / 100 g: BlackberriesLighter per 100 g: BlackberriesSmaller 30 g portion: Blackberries

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.