Hash is a flexible one-pan meal, but its fat content can range from around 1 g to over 12 g per 100 g depending on the meat, cheese, oil, and butter you use. This hash fat per 100g calculator turns your recipe quantities into a clear fat estimate, so you know what you are really eating rather than guessing from a generic food database entry.
Designed for home cooks and anyone tracking macros, the tool accepts grams for common hash ingredients, plus the total cooked batch weight. It then calculates total fat, fat per 100 g, and fat per serving. Quick presets for classic corned beef hash, vegetarian cheese hash, and a lower-fat version make it easy to start, and you can fine-tune every field to match your exact recipe.
🥔 Hash Fat per 100g Calculator
Estimate the fat content of your homemade hash recipe from ingredient weights.
How to Use This Tool
Enter the weight of each ingredient in grams, then add the total weight of the fully cooked hash. If you know how many servings the batch makes, add that too so the tool shows fat per serving as well as fat per 100 g. Any ingredient field you leave blank is treated as zero.
The quick preset buttons load typical amounts for a classic corned beef hash, a vegetarian cheese hash, and a low-fat potato hash. They are starting points, not fixed recipes — adjust the gram values to match exactly what you put in the pan.
How It Works
The calculator uses average fat values for each ingredient, based largely on the USDA FoodData Central database. For each ingredient, the fat contribution is:
Once every ingredient has been added, the calculator divides the total fat by the cooked batch weight:
Typical values used here are about 16 g fat per 100 g for cooked corned beef brisket, 33 g for cheddar, 81 g for butter, 99–100 g for vegetable oil, 9.5 g for whole eggs, and 0.1 g for potatoes and onions. Because vegetables are nearly fat-free, the oil, butter, cheese, and meat almost always decide the final fat content.
Worked Examples
Classic corned beef hash: 400 g potatoes, 250 g corned beef, 100 g onion, 20 g butter, cooked batch weight 720 g.
- Potatoes: 400 × 0.1 ÷ 100 = 0.4 g fat
- Corned beef: 250 × 16 ÷ 100 = 40.0 g fat
- Onion: 100 × 0.1 ÷ 100 = 0.1 g fat
- Butter: 20 × 81 ÷ 100 = 16.2 g fat
Total fat = 56.7 g. Fat per 100 g = 56.7 ÷ 720 × 100 ≈ 7.9 g. A 180 g serving contains about 14.2 g fat.
Compare that with a vegetarian hash made from 600 g potatoes, 120 g onion, 25 g oil, and 80 g cheddar. Total fat is roughly 35.5 g, and over an 800 g cooked batch that is about 4.4 g per 100 g. Small changes in butter or cheese create big differences, so weighing ingredients is worth the effort.
Fat Content Reference
Typical fat values per 100 g for common hash ingredients. Treat these as averages; exact values vary by brand and cut.
| Ingredient | Fat per 100 g |
|---|---|
| Potatoes, boiled | 0.1 g |
| Onion | 0.1 g |
| Corned beef brisket, cooked | 16 g |
| Whole egg | 9.5 g |
| Cheddar cheese | 33 g |
| Butter | 81 g |
| Vegetable oil | 100 g |
Common Mistakes to Avoid
Using raw instead of cooked batch weight. Hash releases water while it cooks, so a cooked batch can weigh noticeably less than the raw ingredients. Weigh the finished hash before serving; otherwise, fat per 100 g will look lower than it really is.
Forgetting the cooking fat. Oil, butter, or bacon drippings stay in the dish. Even a quick swirl of oil adds several grams of fat to the whole batch and should be counted.
Another common mistake is assuming the fat per 100 g is the same as a serving. A typical serving of hash is often 150–250 g, not 100 g. To estimate a serving, multiply the per-100 g value by the serving weight and divide by 100 — or just enter the number of servings in this calculator.
Frequently Asked Questions
Is hash always high in fat? No. A simple potato-and-onion hash cooked with a small amount of spray can be around 1–3 g fat per 100 g. Corned beef hash made with butter and cheese can exceed 12 g per 100 g. The recipe, not the name, determines the number.
Can this calculator replace a packaged food label? For packaged hash, the label is more accurate because the manufacturer knows the exact formulation. Use this tool for homemade hash, where you control every ingredient.
What if I use a different meat or cheese? You can still get a close estimate by substituting the fat value in your head: lean ham or turkey is lower, ground beef or sausage is higher, and reduced-fat cheese lowers the total. For single-ingredient fat tracking, see the cheese fat calculator or the butter calorie calculator.
Why does total cooked weight matter so much? Fat per 100 g is a ratio. If the same amount of fat is spread over a heavier batch, the per-100 g value drops. That is why two hash recipes can look identical in ingredients but have different fat per 100 g once water loss is accounted for.