A typical 1 oz serving of spam contains 3.8 grams of protein (13.4 g per 100 g), which makes it a moderate source of protein. That covers roughly 8% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 17% of the calories in spam come from protein, so it is more of an energy food than a protein food. It contributes to a day's protein total, but the bulk of what it delivers is energy rather than amino acids - treat it as a contributor alongside a denser source, not as the protein in a meal.
Among the 133 meats in the database, spam ranks 133rd by protein per serving, and 554th out of all 796 foods on the site. Set against turkey hot dog, another meat entry in the database, a serving carries about 1.7 g less protein (turkey hot dog has 5.5 g per 1 hot dog).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is measured by weight at 28 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #172951 - "Luncheon meat, pork with ham, minced, canned, includes Spam (Hormel)" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Spam protein FAQ
How much protein is in spam per 100 g?
Spam has 13.4 g of protein per 100 g. A typical 1 oz serving (28 g) provides 3.8 g.
Is spam a complete protein?
Yes. Spam is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
How much of the Daily Value does a serving of spam cover?
A 1 oz serving of spam contains 3.8 g of protein, about 8% of the 50 g reference Daily Value.
Is spam a good source of protein?
Spam is a moderate source of protein, and about 17% of its calories come from protein, which makes it more of an energy food than a protein food. Set against turkey hot dog, another meat entry in the database, a serving carries about 1.7 g less protein (turkey hot dog has 5.5 g per 1 hot dog).