Steak is not inherently low fat, but certain cuts qualify as lean or even extra lean by federal standards. The fat content of a 100-gram serving (about 3.5 ounces) ranges from as little as 6 grams for flank steak to 20 grams for a choice ribeye. That’s a massive range, which means the cut you choose matters far more than whether you’re eating “steak” in general.
What “Lean” Actually Means for Beef
The USDA has specific rules for when beef can be labeled “lean” or “extra lean.” To qualify as lean, a cut must contain less than 10 grams of total fat, 4.5 grams or less of saturated fat, and less than 95 milligrams of cholesterol per 100 grams. Extra lean is stricter: less than 5 grams of total fat and under 2 grams of saturated fat per 100 grams.
By those standards, some steaks comfortably earn the lean label while others don’t come close. A flank steak at 6 grams of fat per 100 grams qualifies as lean, while a ribeye at 18 to 20 grams is nearly double the cutoff.
Fat Content by Cut
USDA nutrient data for raw beef (per 100 grams, with fat untrimmed) shows a clear hierarchy. These numbers reflect select and choice grades, respectively:
- Flank steak: 6 to 8 g total fat, 2.5 to 3.4 g saturated fat
- Top round: 8 g total fat, 3.0 to 3.2 g saturated fat
- Top sirloin: 11 to 14 g total fat, 4.5 to 5.8 g saturated fat
- Tenderloin (filet mignon): 18 g total fat, 7.2 to 7.5 g saturated fat
- Ribeye: 18 to 20 g total fat, 7.3 to 8.1 g saturated fat
Flank and top round are the clear winners if you’re watching fat intake. Both fall within the lean threshold. Sirloin sits in a middle zone, potentially lean at select grade but too fatty at choice grade. Tenderloin surprises many people: despite its reputation as a premium, refined cut, it carries as much fat as a ribeye. That buttery texture comes from intramuscular fat (marbling), not just flavor.
USDA Grade Changes the Numbers
Beef sold at grocery stores is typically graded select or choice. Choice beef has more marbling, which means more intramuscular fat and a richer taste. Select is leaner but can taste drier if overcooked. For cuts where the difference is small, like top round (8 grams either way), grade barely matters. For sirloin, the jump from 11 grams (select) to 14 grams (choice) can push it past the lean threshold.
If you’re buying steak specifically for a lower-fat diet, select-grade cuts give you a modest but real advantage.
Grass-Fed vs. Grain-Fed
Grass-fed cattle take longer to reach market weight and develop less marbling along the way, which produces leaner meat. The total fat difference is meaningful if you’re comparing the same cut. Grass-fed beef also contains roughly twice the omega-3 fatty acids of grain-fed beef, though the absolute amount is small: about 30 milligrams more per serving. That’s a fraction of what you’d get from a piece of salmon.
If you’re choosing between grass-fed and grain-fed purely for fat content, grass-fed edges ahead. But switching from a ribeye to a flank steak will make a bigger difference than switching feeding methods on the same cut.
Trimming Fat Makes a Big Difference
Much of the fat on a steak sits in a visible layer around the edges, and removing it before or after cooking dramatically changes the nutrition. Research published in the Journal of Human Nutrition and Dietetics found that people who trimmed visible fat from their steak reduced the fat content by 79%, bringing the average down to about 6 grams per 100 grams. Even when the study averaged trimmers and non-trimmers together, the group still achieved a 56% reduction overall.
This is one of the simplest ways to make any steak leaner. A sirloin with the fat cap trimmed off can land in lean territory even if the untrimmed version wouldn’t qualify. Trimming won’t remove intramuscular marbling, so you keep some of the flavor while cutting the external fat that contributes most of the saturated fat load.
How a Steak Fits Into Saturated Fat Limits
The American Heart Association recommends keeping saturated fat below 6% of total daily calories. On a 2,000-calorie diet, that translates to about 13 grams per day. A typical restaurant steak is 6 to 8 ounces (170 to 225 grams), not the 100-gram portions used in nutrient databases.
A 6-ounce choice ribeye delivers roughly 14 grams of saturated fat, already exceeding the daily limit in a single sitting. A 6-ounce flank steak, by contrast, comes in around 5 to 6 grams of saturated fat, leaving room for other foods throughout the day. The practical takeaway: leaner cuts let you eat steak without automatically blowing past recommended limits, while fattier cuts demand trade-offs at your other meals.
Choosing the Leanest Steak
If your goal is a genuinely low-fat steak dinner, stack your choices: pick a naturally lean cut (flank, top round, or eye of round), choose select grade or grass-fed, and trim any visible fat before cooking. That combination can bring total fat down to 5 or 6 grams per 100-gram serving, which meets the extra-lean standard and puts steak in the same fat range as skinless chicken thigh.
Cooking method matters too. Grilling or broiling allows fat to drip away from the meat, while pan-frying in oil or butter adds fat back. Using a rack or grill grate keeps the steak out of rendered fat as it cooks.
Steak isn’t a single food with a single fat number. It’s a category with enormous variation, and the choices you make at the store and the cutting board determine whether your steak is lean or loaded.