Wondering how many calories are hiding in that juicy ribeye or lean sirloin? This steak calories per gram calculator converts your portion weight into a clear calorie and macronutrient estimate. Pick your cut, enter the weight in grams or ounces, add any butter or oil used during cooking, and the tool does the rest — including calories per gram, per ounce, and per 100 grams.
Steak is one of the most nutrient-dense proteins: rich in complete protein, iron, zinc, and B vitamins, with zero carbohydrates. But calorie density varies dramatically between a well-marbled ribeye and a trimmed flank steak. This tool is designed for anyone tracking daily calories, following a high-protein or ketogenic diet, or simply trying to understand portion sizes better.
The estimates are based on approximate cooked values from USDA-style nutrition data. For more precise results, enter the calorie value printed on your steak's packaging in the custom density field.
🥩 Steak Weight to Calories
Enter the weight of your cooked steak, choose the cut, and see the calorie and macro estimate.
📊 Your Estimate
How to Use This Tool
The calculator is built for quick portion math, but it works best when you use consistent inputs. Start by selecting the cut that matches your steak; each option includes a rough calorie density per 100 grams of cooked meat with visible fat eaten. Next, enter the portion weight and choose grams or ounces. If you cooked your steak with butter or oil, select that from the drop-down; the tool will add those calories and fat grams to your total. Finally, click Calculate to see total calories, calories per gram, per ounce, and an estimated protein-fat breakdown.
- Pick the closest cut in the drop-down.
- Enter the cooked weight of the steak on your plate.
- Select any cooking fat you added.
- Press Calculate and read the totals in the result panel.
How the Calorie Estimate Is Calculated
Steak is mostly protein and fat, both of which contribute calories: protein provides about 4 kcal per gram and fat provides about 9 kcal per gram. Instead of asking you to weigh individual macros, the calculator stores approximate calorie and macro densities for each cut and multiplies them by your portion.
Total calories = (density per 100 g × weight in grams ÷ 100) + added fat calories
Calories per gram = total calories ÷ total weight in grams
If you choose ounces, the calculator first converts to grams using 1 oz = 28.35 g. The macronutrient lines follow the same logic: protein and fat per 100 g are scaled to your portion, and any selected butter or oil fat is added to the fat total.
Calorie Reference by Cut
The table below lists the approximate cooked values used as defaults. Treat them as averages; individual steaks can differ noticeably.
| Cut | Calories / 100 g | Protein (g) | Fat (g) |
|---|---|---|---|
| Ribeye | 290 | 23 | 22 |
| Strip / New York | 250 | 24 | 17 |
| Sirloin | 220 | 25 | 13 |
| Filet mignon | 210 | 24 | 12 |
| Flank | 190 | 27 | 9 |
| T-bone / Porterhouse | 250 | 24 | 17 |
| Ground steak 80/20 | 270 | 21 | 21 |
If your steak is trimmed of all visible fat, subtract some calories and fat grams from these figures. If you have a nutrition label, the custom field lets you replace the default density entirely.
Worked Examples
Example 1: 6 oz sirloin, no added fat. Convert 6 oz to grams: 6 × 28.35 = 170.1 g. With sirloin at 220 kcal/100 g, total calories = 220 × 170.1 ÷ 100 ≈ 374 kcal. Protein = 25 × 170.1 ÷ 100 ≈ 42.5 g, and fat = 13 × 170.1 ÷ 100 ≈ 22.1 g. The result panel also shows about 2.2 kcal per gram.
Example 2: 12 oz ribeye with 1 tbsp butter. 12 oz = 340.2 g. Ribeye at 290 kcal/100 g gives 986 kcal before the butter. One tablespoon of butter adds about 100 kcal and 11.5 g fat, so the final estimate is about 1,086 kcal, with roughly 78 g protein and 86 g fat. Per gram, that steak lands near 3.2 kcal.
Accuracy & Limitations
These estimates are not lab measurements. The exact calories in a steak depend on the animal's breed, diet, age, marbling score, how the butcher trims it, and how it is cooked. A heavily marbled restaurant ribeye can be substantially more calorie-dense than a lean select-grade sirloin from the same butcher case.
Grilling and broiling render some fat that drips away, but the calorie count also depends on what you actually eat: if you cut off the fat cap after cooking, your true intake is lower than the estimate. For fast portion checks, you can also use the steak calories per ounce calculator to compare serving sizes in ounces without typing weights. If you are monitoring potassium alongside calories, the steak potassium calculator gives a useful mineral snapshot.
Frequently Asked Questions
Should I weigh steak raw or cooked?
Weigh cooked steak for this calculator, because the cut densities are based on cooked meat. If you only have a raw weight, cook a test portion and weigh it again to find the water loss; or use the calorie value from the raw label and enter it as a custom density.
Is steak keto-friendly?
Yes, steak is naturally carbohydrate-free and provides plenty of protein and fat, which makes it a staple in ketogenic and low-carb diets. The main consideration is total calories; a large, heavily buttered ribeye can still exceed your daily energy target.
Why does my nutrition label disagree with the result?
Labels are the most reliable source for the exact product you bought. Different producers, grades, and preparation methods change the numbers. Use the custom 'calories per 100g' field to override the cut default and bring the estimate in line with your label.