Daily Fiber Calculator
Fiber targets scale with calories. Fourteen grams per 1000 kcal is the adequate-intake approach used for adults.
Result
Enter the values and press Calculate. Numbers outside the allowed range produce no result.
How is it calculated?
At 2000 kcal the target is 28 g. Fixed floors of 25 g for women and 38 g for men are also widely cited.
Fiber (g) = daily kcal ÷ 1000 × 14
Reference table
| Calories | 14 g rule |
|---|---|
| 1600 | 22 g |
| 2000 | 28 g |
| 2500 | 35 g |
How should you read the result?
Doubling fiber overnight can cause bloating. Increase it over several days with fluids. Bowel disease needs individual advice.
Frequently asked questions
How many grams of fiber do I need?
About 14 g per 1000 kcal, or 28 g at 2000 kcal.
Soluble versus insoluble fiber?
Soluble fiber is higher in oats and legumes; insoluble fiber in bran and skins. The gram target counts both.
Does fiber cause weight loss?
It can increase fullness, but weight loss still needs a calorie deficit. Fiber does not burn fat by itself.
Can a supplement replace food fiber?
A powder can fill the grams, but it does not carry the other nutrients in vegetables, legumes and whole grains.