Grams of Fat to Calories Converter
Instantly convert grams of dietary fat into calories and kilojoules. Accurate, free nutrition calculator for macro tracking and diet planning.
Calculate Your Fat Calories
Enter the grams of fat from your food or daily intake below to get an instant, precise conversion to calories, kilojoules, and daily value percentage.
Nutrition Converter
Enter the grams of fat to see the energy equivalent
Check the nutrition label on your food packaging
Used to calculate the % Daily Value based on a 35% fat max
Energy Conversion
Based on standard nutritional science (1g fat = 9 kcal)
Common Foods Fat & Calorie Content
Estimated fat grams and resulting calories for common dietary fat sources to help with meal planning.
| Food Item | Serving Size | Grams of Fat | Calories from Fat |
|---|---|---|---|
| Olive Oil | 1 tbsp (15ml) | 14g | 126 kcal |
| Butter | 1 tbsp (14g) | 11g | 99 kcal |
| Almonds | 1 oz (28g) | 14g | 126 kcal |
| Avocado | 1/2 medium | 15g | 135 kcal |
| Salmon (cooked) | 3 oz (85g) | 11g | 99 kcal |
| Cheddar Cheese | 1 oz (28g) | 9g | 81 kcal |
Dietary Fat & Calories FAQ
Everything you need to know about calculating calories from fat and understanding macronutrients.
There are exactly 9 calories in 1 gram of fat. This makes fat the most energy-dense macronutrient, compared to carbohydrates and protein, which both provide 4 calories per gram.
To calculate the calories from fat, simply multiply the number of grams of fat by 9. For example, if a food contains 10 grams of fat, it provides 90 calories from fat (10 × 9 = 90).
Fat molecules contain more carbon-hydrogen bonds than carbohydrates or proteins. When these bonds are broken down during metabolism, they release more energy, resulting in a higher caloric yield per gram.
Health authorities generally recommend that fat should make up 20% to 35% of your total daily calories. For a standard 2,000-calorie diet, this equates to roughly 44 to 78 grams of fat per day.