Every 100 kcal of beef sirloin steak brings 14.4 g of protein. On that measure it ranks 58th of the 133 meats in this database and 154th of all 796 foods on the site. Measured by weight instead, its 29.6 g per 100 g ranks 29th in its group.
About 57% of the calories in beef sirloin steak come from protein, which makes it very protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Weight for weight, beef sirloin steak has 3.4 g of protein for each gram of fat (29.6 g against 8.8 g per 100 g).
Set against beef liver, another meat entry in the database, a serving carries about 0.5 g more protein (beef liver has 24.7 g per 3 oz cooked).
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 quoted here is measured by weight at 85 g, and it covers about 50% of the 50 g FDA Daily Value for protein.
Rich in leucine, the amino acid that most strongly triggers muscle-protein synthesis.
Serving sizes
Protein in common portions of beef sirloin steak
Protein and calories in Beef sirloin steak for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
29.6 g
206 kcal
3 oz cooked (serving used here)
85 g
25.2 g
175 kcal
1 steak (yield from 505 g raw meat)
375 g
111 g
773 kcal
Portion weights are the household measures listed on the USDA record; protein and calories scale from the per-100 g figures.
Amino acids
Essential amino acids in beef sirloin steak
The nine essential amino acids in Beef sirloin steak, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
2.36 g
2.01 g
80
lysine
2.5 g
2.13 g
84
valine
1.47 g
1.25 g
50
isoleucine
1.35 g
1.15 g
46
threonine
1.18 g
1 g
40
phenylalanine
1.17 g
0.99 g
40
methionine
0.772 g
0.66 g
26
histidine
0.946 g
0.8 g
32
tryptophan
0.195 g
0.17 g
7
Per-100 g values are the amino acid analysis on the USDA record. The serving and per-gram-of-protein columns are arithmetic on those values; they are not a protein quality score.
SampleWhat goal trends look like after a week
109 g
Average per logged day
4 of 7
Days goal met
71%
Complete-protein share
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sample figures for one made-up week against a 110 g goal, not your data. Red bars met the goal. Your own log fills this in with Premium.
How much protein is in 100 g of beef sirloin steak?
29.6 g. The 3 oz cooked serving used on this page weighs 85 g and so carries 25.2 g.
How much protein do you get per 100 calories of beef sirloin steak?
14.4 g. That figure divides its 29.6 g of protein per 100 g by its 206 kcal per 100 g, so it does not depend on serving size.
Is the protein in beef sirloin steak complete?
Yes. The protein in beef sirloin steak supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
What share of the protein Daily Value is one serving of beef sirloin steak?
About 50%. One 3 oz cooked serving has 25.2 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #168633 (Beef, top sirloin, steak, separable lean and fat, trimmed to 0" fat, select, cooked, broiled), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.