Fiber for Weight Loss Calculator
Use your calorie target or estimate one from your body measurements and activity. Get a daily fiber target and a gradual ramp-up schedule.
Result
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Daily target
— grams of fiber
- Calorie target
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- Per-calorie figure
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- Absolute floor
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- How to ramp up
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Weekly schedule
· Free
Track it in Fiber Tracker.
Track nutrition habits and daily goals privately on your device.
How much fiber per day helps with weight loss?
If you are asking how much fiber per day to lose weight, the anchor is 14 grams of dietary fiber per 1,000 calories. Fiber does not burn fat; it can increase satiety and slow gastric emptying, which may make a calorie deficit easier to hold.
The calculator compares the per-calorie figure with the adult Adequate Intake floor for your sex and age, then uses the larger number. Average US intake is about 15 grams per day, so many people are simply eating less fiber than these targets.
If your current intake is lower, increase by about 5 grams per week and increase water alongside it. A fast increase without enough fluid can lead to bloating and gas.
Fiber target = max(calorie target ÷ 1,000 × 14, adult absolute floor) Estimated calories use Mifflin–St Jeor, then subtract 500 calories for a moderate deficit. The estimate is clamped at 1,200 calories for women or 1,500 calories for men when needed.
Fiber for weight loss FAQ
Does fiber burn fat?
No. Fiber does not burn fat. It may increase satiety and slow gastric emptying, which can make a calorie deficit easier to maintain.
Why is my target higher than 14 grams per 1,000 calories?
The calculator uses the larger of the per-calorie figure and the adult absolute Adequate Intake floor for your sex and age.
How quickly should I increase fiber?
Increase by about 5 grams per week and increase water alongside it to reduce the chance of bloating and gas.
Can I use my own calorie target?
Yes. Enter a positive daily calorie target directly, or provide height, weight, and activity so the calculator can estimate calories using Mifflin–St Jeor.
Are my values saved?
No. The calculation runs in your browser and this tool does not require an account or network request.