Does lamb leg or beef sirloin have more protein?
Beef sirloin, at 29g per 100g versus 25g for lamb leg.
Lamb leg vs Beef sirloin: Which Has More Protein?
Beef sirloin wins on protein: 29g per 100g versus 25g, a gap of 4g. Calories and protein quality change the picture, so here is the full comparison.
Head to head, per 100g
| Food | Protein | Calories |
|---|---|---|
| 🥩 Beef sirloin (cooked) | 29g | 196 |
| 🍖 Lamb leg (cooked) | 25g | 180 |
Per 100g.
What the numbers mean
Lamb leg delivers 25g of protein for 180 calories per 100g. Beef sirloin delivers 29g for 196 calories. If you are counting calories as well as protein, lamb leg is the leaner choice per 100g.
Protein quality: lamb leg is a complete protein, beef sirloin is a complete protein. Complete proteins carry all nine essential amino acids in useful amounts; incomplete ones are still valuable, they just want a complementary source across the day.
Complete protein, rich in zinc. Dense complete protein, rich in iron, B12, creatine.
Which should you choose?
- For maximum protein per 100g: beef sirloin (29g).
- For the fewest calories per 100g: lamb leg.
- For everyday practicality, the better choice is the one you will actually eat regularly — the difference between 25g and 29g matters far less than consistency across the week.
- Mixing both across the week covers a wider spread of micronutrients than committing to one.
Add up your whole meal
Type what you ate in plain words and Protein Hunter returns protein and calories for the full plate.
Try the Protein CalculatorCommon questions
Which has fewer calories, lamb leg or beef sirloin?
Lamb leg — 180 calories per 100g versus 196.
Can I swap one for the other in a recipe?
Usually yes, but adjust the weight so the protein matches. To replace 100g of beef sirloin you need about 116g of lamb leg.
Keep reading
Protein in lamb leg25g per 100g in full detail.Protein in beef sirloin29g per 100g in full detail.Compare any two foodsSearch the full protein database.What is Protein Hunter?
Protein Hunter is a protein and nutrition app with a database of 232 foods — from a leaf of kale to a wagyu steak — plus AI tools that answer protein questions, count a whole meal, build recipes to a macro target, and track what you actually eat.
- Search any food
- Count a full meal
- Recipes to your macros
- Scan a plate or label
Why it's different: the numbers are calculated from a fixed ingredient database rather than guessed, and when a target is not physically achievable the app says so instead of inventing a figure.
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