Inside Round vs Sirloin Cap — What's the Difference?
Quick Answer
Inside Round (top round (inside round)) and Sirloin Cap (sirloin cap) are not the same cut: Inside Round is round primal (Inner thigh of the hindquarter); Sirloin Cap is sirloin primal (top sirloin cap (coulotte)).
Canonical entities: Inside Round · Sirloin Cap
Side-by-side
| inside round | sirloin cap | |
|---|---|---|
| Primal | round | sirloin |
| Muscle / location | Inner thigh of the hindquarter | top sirloin cap (coulotte) |
| Character | A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised. | Triangular cap on the top sirloin; prized as picanha in Brazil. |
Key differences
- Different primals: round vs sirloin.
- Texture and slicing: compare fibrous, grain-heavy cuts vs more tender steak-style muscles based on each cut’s description.
- Retail naming diverges by country—always map through a canonical cut when translating menus or labels.
When to use each
Inside Round
Pick Inside Round when you want its specific marbling/texture profile: A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised.
Sirloin Cap
Pick Sirloin Cap when its primal/muscle traits fit the dish: Triangular cap on the top sirloin; prized as picanha in Brazil.
Inside Round and Sirloin Cap are different canonical muscles/primals: Inside Round is round (Inner thigh of the hindquarter); Sirloin Cap is sirloin (top sirloin cap (coulotte)).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: inside round (what-is) · sirloin cap (what-is) · inside round hub · sirloin cap hub