Every 100 kcal of sweet whey powder brings 3.7 g of protein. On that measure it ranks 72nd of the 81 dairy foods in this database and 562nd of all 796 foods on the site. Measured by weight instead, its 12.9 g per 100 g ranks 43rd in its group.
Around 15% of the calories in sweet whey powder 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.
Weight for weight, sweet whey powder has 12.1 g of protein for each gram of fat (12.9 g against 1.07 g per 100 g).
Set against half and half, another dairy food entry in the database, a serving carries about 0.5 g more protein (half and half has 0.5 g per 1 tbsp).
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 volume at 7.5 g, and it covers about 2% of the 50 g FDA Daily Value for protein.
Food-grade sweet whey is mostly lactose, unlike concentrated whey protein powder.
Serving sizes
Protein in common portions of sweet whey powder
Protein and calories in Sweet whey powder for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
12.9 g
353 kcal
1 tbsp (serving used here)
7.5 g
1 g
26 kcal
1 cup
145 g
18.7 g
512 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 sweet whey powder
The nine essential amino acids in Sweet whey powder, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
1.19 g
0.09 g
92
lysine
1.03 g
0.08 g
80
valine
0.697 g
0.05 g
54
isoleucine
0.719 g
0.05 g
56
threonine
0.817 g
0.06 g
63
phenylalanine
0.407 g
0.03 g
32
methionine
0.241 g
0.02 g
19
histidine
0.237 g
0.02 g
18
tryptophan
0.205 g
0.02 g
16
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 sweet whey powder?
12.9 g. The 1 tbsp serving used on this page weighs 7.5 g and so carries 1 g.
How much protein do you get per 100 calories of sweet whey powder?
3.7 g. That figure divides its 12.9 g of protein per 100 g by its 353 kcal per 100 g, so it does not depend on serving size.
Is the protein in sweet whey powder complete?
Yes. The protein in sweet whey powder 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 sweet whey powder?
About 2%. One 1 tbsp serving has 1 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #171283 (Whey, sweet, dried), 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.