A typical 1 bun serving of whole wheat hamburger bun contains 6.9 grams of protein (12.4 g per 100 g), which makes it a moderate source of protein. That covers roughly 14% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 18% of the calories in whole wheat hamburger bun 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 111 grains in the database, whole wheat hamburger bun ranks 21st by protein per serving, and 388th out of all 796 foods on the site. Set against fried rice, another grain entry in the database, a serving carries about 0.5 g more protein (fried rice has 6.4 g per 1 cup).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving above is counted by piece at 56 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Source: USDA FoodData Central #174090 - "Rolls, hamburger or hot dog, whole wheat" (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
Whole wheat hamburger bun protein FAQ
How much protein is in whole wheat hamburger bun per 100 g?
Whole wheat hamburger bun has 12.4 g of protein per 100 g. A typical 1 bun serving (56 g) provides 6.9 g.
Is whole wheat hamburger bun a complete protein?
No. Whole wheat hamburger bun is an incomplete protein on its own; pairing it with other protein sources across the day covers the full range of essential amino acids.
How much of the Daily Value does a serving of whole wheat hamburger bun cover?
A 1 bun serving of whole wheat hamburger bun contains 6.9 g of protein, about 14% of the 50 g reference Daily Value.
Is whole wheat hamburger bun a good source of protein?
Whole wheat hamburger bun is a moderate source of protein, and about 18% of its calories come from protein, which makes it more of an energy food than a protein food. Set against fried rice, another grain entry in the database, a serving carries about 0.5 g more protein (fried rice has 6.4 g per 1 cup).