How Many Calories in a Pound of Fat?
Quick Answer
There are approximately 3,500 calories in a pound of body fat.
1 lb body fat ≈ 3,500 kcal deficit
Understanding the Conversion
The widely cited figure of 3,500 calories per pound of fat is based on fat tissue containing about 87% pure fat at 9 cal/g. In practice, losing a pound of body weight requires a slightly different deficit because body fat tissue also contains water and protein. Modern research suggests the true value may be closer to 3,000–3,500 calories.
Formula
1 lb body fat ≈ 3,500 kcal deficit
Common Examples
| Description | Value |
|---|---|
| 500 cal/day deficit | Lose ≈1 lb/week |
| 1,000 cal/day deficit | Lose ≈2 lb/week (max safe rate) |
| 10 lb fat loss | ≈35,000 calorie deficit |
Quick Reference Table
Use this table for quick conversions between pound of fat and calories:
| pound of fat | calories |
|---|---|
| 1 | 3,500 |
| 2 | 7,000 |
| 5 | 17,500 |
| 10 | 35,000 |
| 25 | 87,500 |
| 50 | 175,000 |
| 100 | 350,000 |
Frequently Asked Questions
How Many Calories in a Pound of Fat?
There are approximately 3,500 calories in a pound of body fat. The widely cited figure of 3,500 calories per pound of fat is based on fat tissue containing about 87% pure fat at 9 cal/g. In practice, losing a pound of body weight requires a slightly different deficit because body fat tissue also contains water and protein. Modern research suggests the true value may be closer to 3,000–3,500 calories.
What is the formula to convert pound of fat to calories?
The formula is: 1 lb body fat ≈ 3,500 kcal deficit. To convert, multiply the number of pound of fats by 3,500 to get the equivalent in calories.
How do I convert calories to pound of fat?
To convert calories to pound of fat, divide the number of calories by 3,500. For example, 17,500 calories equals 5 pound of fats.