How Many Calories Are In Steak And Potatoes? | Plate Facts

Calorie Math For Steak With Potatoes At Dinner

The baseline plate is simple: about 8 ounces of grilled top sirloin plus one medium russet potato baked in its skin. An 8 ounce cooked sirloin sits near 460 calories, based on about 203 calories per 100 grams of cooked lean sirloin. A medium baked russet (about 173 grams) adds close to 160 calories with almost no fat. Add a tablespoon of butter on the potato and you tack on about 100 calories and around 7 grams of saturated fat. That pushes the plate toward 750–800 calories even before sour cream or gravy shows up.

Swap sirloin for a fattier cut like ribeye and the steak portion alone can jump to about 660 calories for the same 8 ounce cooked weight, since ribeye runs closer to 290 calories per 100 grams cooked. Trade the plain baked potato for mashed potatoes made with whole milk, butter, and salt, and one heaping cup sits near 237 calories with more than 650 milligrams of sodium. That’s how the same steak dinner can land in the mid-600s or blow past 1,000 in minutes.

Typical Plate Numbers

The table below lines up common steak cuts and potato sides, with serving sizes you’ll see at home or in a steakhouse.

Food Item	Typical Serving	Calories (kcal)
Top Sirloin, Grilled, Trimmed	8 oz cooked (~227 g)	~460
Ribeye, Grilled, With Fat	8 oz cooked (~227 g)	~660
Baked Russet Potato, Plain (Skin On)	1 medium (~173 g)	~160
Mashed Potatoes With Whole Milk & Butter	1 cup (~210 g)	~237
Fast-Food French Fries, Medium Order	About 100 g	~320

Beef brings dense protein — cooked sirloin lands above 30 grams of protein per 100 grams — so even a six ounce cut feels hearty. A plain baked potato adds starch, fiber, and potassium with almost no fat or sodium when you skip the salt shaker.

Before going deeper into toppings and swaps, it helps to know your own daily calorie needs. That tells you whether this plate fits your day or lands like a splurge.

Why The Number Swings So Much

Two levers drive the swing: marbling in the beef and add-ons on the potato. Ribeye and T-bone carry more marbling, so each cooked ounce packs more calories than a lean top sirloin or eye of round. Mashed potatoes made with whole milk, butter, and salt sit near 237 calories per cup and more than 650 milligrams of sodium, which makes that scoop a stealth calorie bomb. A medium fast-food fry order lands close to 320 calories, about 15 grams of fat, and roughly 260 milligrams of sodium. Swap baked potato for fries and you add around 150 calories plus a salty oil hit, no extra protein.

Steak Calories Breakdown

Not all beef cuts behave the same on the grill. Marbling keeps a bite juicy, but it also raises calorie density and saturated fat. Leaner cuts sit lower in both.

Lean Cuts Vs Fatty Cuts

Sirloin Or Strip

Trimmed top sirloin and many center-cut strips land near 200 calories per 100 grams cooked, with a protein punch north of 30 grams and almost no carbs. A six ounce cooked portion (about 170 grams) sits near 350 calories but still looks like a full steak.

Ribeye Or T-Bone

A ribeye keeps the marbling that melts and bastes itself as it cooks. Numbers around 290 calories per 100 grams cooked are common. That means a 10 ounce restaurant ribeye can clear 800 calories before a single side shows up. Fat tastes great, but it also brings saturated fat. The American Heart Association saturated fat guidance steers most adults toward keeping saturated fat under about 13 grams per day on a 2,000 calorie pattern to help manage LDL cholesterol. Going with a slightly smaller ribeye or splitting one steak across two plates trims both calories and saturated fat without cutting beef out.

Cooking Style Changes The Count

Grilling or broiling lets fat drip off. Pan-searing in butter, basting with butter, and serving the steak with a butter disc on top all send calories north fast because each tablespoon of butter brings about 102 calories and around 7 grams of saturated fat. Portion size matters too. Many steakhouse menus start at 10 ounces cooked weight, so dropping to 6–8 ounces at home can shave two to three hundred calories from the beef alone with no change to seasoning.

Potato Calories Breakdown

Potatoes act like a sponge for fat and salt. A plain baked russet with the skin gives carbs for energy plus fiber, potassium, and vitamin C with almost no fat. A medium baked russet sits near 160 calories, under 1 gram of fat, around 37 grams of carbs, close to 4 grams of fiber, and more than 900 milligrams of potassium, along with minimal sodium when you skip salt. The USDA FoodData Central database shows that plain baked potato also stays low in sodium before you salt it, which is one reason many steak houses pitch it as the “plain side.”

Baked Potato Plain

A plain baked potato plays the “bread” role on the plate. Pair that with a lean sirloin and you’ve got protein, iron, and carbs without heavy butter or cream. Ordering it “naked,” with butter and sour cream on the side, helps you control how much fat lands on each bite. One tablespoon of butter alone adds about 102 calories and around 7 grams of saturated fat.

Mashed Potato With Butter And Milk

Mashed potatoes feel soft and salty, which makes it easy to eat a big scoop. A home-style cup made with whole milk, butter, and salt sits near 237 calories, about 9 grams of fat, and more than 650 milligrams of sodium in that one cup. Steakhouse scoops often run larger than a level cup, so you may be looking at 300+ calories just from the mash.

Fries Or Roasted Cubes In Oil

Fries get dunked in oil and salted. A medium fast-food fry order lands close to 320 calories, about 15 grams of fat, and roughly 260 milligrams of sodium. Swap baked potato for fries and you add around 150 calories plus a salty oil hit, no extra protein. Oven-roasted potato cubes at home sit in the middle. Tossing potatoes in a spoon or two of olive oil before roasting adds fat calories, but the total usually stays lower than deep-fried fries because the potato doesn’t soak up as much oil.

How To Trim Calories Without Losing The Steak-And-Potato Feel

The aim isn’t to ditch steak night. The aim is to shape the plate so it still feels like steak night while trimming calories, saturated fat, and sodium.

Swap Or Tweak	What Changes	Approx Calorie Savings
Go 6–8 Oz Lean Sirloin Instead Of 10+ Oz Ribeye	Less marbling, smaller cut	200–300 kcal off the steak
Plain Baked Potato Instead Of Loaded Mashed	Skip butter/whole milk/salt bomb	80–150 kcal off the side
Olive Oil Drizzle Instead Of Butter Slab	Use a measured teaspoon of oil after cooking	50–80 kcal saved vs 1 tbsp butter

Those three moves alone — smaller lean steak, plain baked potato, and measured oil instead of a butter slab — can pull 300 to 500 calories off dinner while keeping the same steakhouse feel. You’ll still walk away full, because that steak is loaded with protein and the potato still brings starch and fiber.

Bottom Line For Your Plate

An 8 ounce lean grilled sirloin plus a plain baked russet usually falls in the 600–700 calorie pocket and gives you protein, iron, carbs, fiber, and potassium. Add butter, mashed potatoes, or a fattier ribeye and the same dinner can shoot past 1,000 calories and take up roughly half a day’s suggested saturated fat cap in one sitting. If you’re trying to manage weight or watch LDL cholesterol, the two biggest levers are steak portion size and how much butter, cream, and salty add-ons land on the potato. Want a breakfast game plan that lines up with that goal? Try our high protein breakfast ideas for protein-heavy meals that stay lighter on butter and fried starch.