WellByNumbers.

Special K (original) vs Cheerios (plain)

Both count toward 30 plants a week.

Special K (original)Cheerios (plain)
Protein · per 100 g15.0 g12.4 g
Carbs · per 100 g76.0 g73.2 g
Fat · per 100 g1.0 g6.6 g
Fiber · per 100 g3.0 g10.1 g
Energy · per 100 g379 kcal372.0 kcal
Protein · per 100 kcal4.0 g3.3 g
To hit 30 g protein200 g · 758 kcal242 g · 900 kcal

The same three numbers, drawn

Protein / 100 g15.012.4Fiber / 100 g3.010.1Protein / 100 kcal4.03.3Special KCheerios

What 30 g of protein looks like on a plate

200 gSpecial K758 kcal rides along242 gCheerios900 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 16%carbs 82%2%
protein 12%carbs 73%fat 15%

The one-line verdict: Special K (original) delivers 1.2× the protein per calorie of Cheerios (plain) (4.0 g vs 3.3 g per 100 kcal).

More protein / 100 g: Special KMore fiber / 100 g: CheeriosLighter per 100 g: CheeriosSmaller 30 g portion: Special K

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.