When shopping, you'll find lots of choices but inconsistent labeling. Some packages tout the cut of beef (like ground chuck). Others list percentages or ratios that may be confusing, like 90/10. Beef with 10% fat by weight gets 51% of its calories from fat because fat is more caloric than meat. Know these terms:
GROUND HAMBURGER Ground from the trimmings of any cut of beef. Fat can be added, but the total fat content allowable is capped at a whopping 30% by weight (81% calories from fat, raw).
GROUND BEEF Like hamburger but no added fat.
GROUND CHUCK Beef ground from the chuck (shoulder section) that contains about 15% to 20% fat (63% to 71% calories from fat, raw).
GROUND ROUND From the round (rump to hind leg), about 10% to 15% fat (51% to 63% calories from fat, raw).
GROUND SIRLOIN We like beef ground from the lean sirloin, which contains about 8% to 10% fat (up to 51% calories from fat, raw). In a recent blind tasting of several types of ground sirloin (grain-fed, organic, grass-fed, and Angus), the beefy-tasting grass-fed was the unanimous winner.