How Many Calories in a Gram of Fat?
Quick Answer
There are 9 calories (kcal) in a gram of fat.
1 g fat = 9 kcal
Understanding the Conversion
Pure fat provides 9 kilocalories per gram — more than twice the energy density of protein or carbohydrates (both 4 kcal/g). This is why high-fat foods are calorie-dense. The 9 kcal/g value applies to all types of fat: saturated, unsaturated, and trans fats.
Formula
1 g fat = 9 kcal
Common Examples
| Description | Value |
|---|---|
| 1 tablespoon olive oil (14g fat) | 126 kcal |
| 1 avocado (29g fat) | 261 kcal from fat |
| 100g butter (82g fat) | 738 kcal from fat |
Quick Reference Table
Use this table for quick conversions between gram of fat and calories:
| gram of fat | calories |
|---|---|
| 1 | 9 |
| 2 | 18 |
| 5 | 45 |
| 10 | 90 |
| 25 | 225 |
| 50 | 450 |
| 100 | 900 |
Frequently Asked Questions
How Many Calories in a Gram of Fat?
There are 9 calories (kcal) in a gram of fat. Pure fat provides 9 kilocalories per gram — more than twice the energy density of protein or carbohydrates (both 4 kcal/g). This is why high-fat foods are calorie-dense. The 9 kcal/g value applies to all types of fat: saturated, unsaturated, and trans fats.
What is the formula to convert gram of fat to calories?
The formula is: 1 g fat = 9 kcal. To convert, multiply the number of gram of fats by 9 to get the equivalent in calories.
How do I convert calories to gram of fat?
To convert calories to gram of fat, divide the number of calories by 9. For example, 45 calories equals 5 gram of fats.