WellByNumbers.

Spinach (raw) vs Kale (raw)

Both count toward 30 plants a week.

Spinach (raw)Kale (raw)
Protein · per 100 g2.9 g2.9 g
Carbs · per 100 g3.6 g4.4 g
Fat · per 100 g0.4 g1.5 g
Fiber · per 100 g2.2 g4.1 g
Energy · per 100 g23.0 kcal35.0 kcal
Protein · per 100 kcal12.4 g8.3 g
To hit 30 g protein1049 g · 241 kcal1027 g · 360 kcal

The same three numbers, drawn

Protein / 100 g2.92.9Fiber / 100 g2.24.1Protein / 100 kcal12.48.3SpinachKale

What 30 g of protein looks like on a plate

1049 gSpinach241 kcal rides along1027 gKale360 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 39%carbs 49%fat 12%
protein 27%carbs 41%fat 31%

The one-line verdict: Spinach (raw) delivers 1.5× the protein per calorie of Kale (raw) (12.4 g vs 8.3 g per 100 kcal).

More protein / 100 g: KaleMore fiber / 100 g: KaleLighter per 100 g: SpinachSmaller 30 g portion: Kale

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.