WellByNumbers.

Flounder (cooked) vs Cod (cooked)

Flounder (cooked)Cod (cooked)
Protein · per 100 g15.2 g20.4 g
Carbs · per 100 g0.0 g0.0 g
Fat · per 100 g2.4 g0.2 g
Fiber · per 100 g0.0 g0.0 g
Energy · per 100 g86.0 kcal84.0 kcal
Protein · per 100 kcal17.7 g24.3 g
To hit 30 g protein197 g · 169 kcal147 g · 123 kcal

The same three numbers, drawn

Protein / 100 g15.220.4Fiber / 100 g0.00.0Protein / 100 kcal17.724.3FlounderCod

What 30 g of protein looks like on a plate

197 gFlounder169 kcal rides along147 gCod123 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 74%fat 26%
protein 97%3%

The one-line verdict: Cod (cooked) delivers 1.4× the protein per calorie of Flounder (cooked) (24.3 g vs 17.7 g per 100 kcal).

More protein / 100 g: CodLighter per 100 g: CodSmaller 30 g portion: Cod

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.