Fiber Intake Calculator
Daily fibre target and your gap.
Enter your values
Enter the daily calories in kcal.
Choose one of: Male, Female.
Enter the current fibre intake in g.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Daily fibre target
- 31 g
- Standard guideline
- 38 g
- Your shortfall
- 13 g
- Equivalent apples
- 2.9
- Equivalent cups of black beans
- 0.9
Quick answer
Adults need roughly 14 g of fibre per 1000 calories — about 25 g for women and 38 g for men.
Fibre (g) = calories ÷ 1000 × 14
At a glance
| What it does | Daily fibre target and your gap. |
|---|---|
| Category | Health |
| Inputs needed | Daily calories, Sex, Current fibre intake |
| Main output | Daily fibre target |
| Formula | Fibre (g) = calories ÷ 1000 × 14 |
| Cost | Free — no sign-up, no download |
How to use the Fiber Intake Calculator
- 1Enter your daily calorie intake.
- 2Select your sex for the standard guideline.
- 3Enter what you currently eat to see the gap.
Inputs explained
- Daily calories(kcal)
- Enter the daily calories in kcal.
- Sex
- Choose one of: Male, Female.
- Current fibre intake(g)
- Enter the current fibre intake in g.
Worked example
Using the values the calculator loads with:
Inputs
- Daily calories2200 kcal
- SexMale
- Current fibre intake18 g
Results
- Daily fibre target31 g
- Standard guideline38 g
- Your shortfall13 g
- Equivalent apples2.9
- Equivalent cups of black beans0.9
Frequently asked questions
Can I get too much fibre?
Above 50 g a day can cause bloating and reduce mineral absorption.
Should I increase gradually?
Yes — add 5 g a week and drink more water.
What do I need to enter into the Fiber Intake Calculator?
Just 3 values: daily calories, sex, current fibre intake. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Fiber Intake Calculator work out the answer?
Adults need roughly 14 g of fibre per 1000 calories — about 25 g for women and 38 g for men. It applies the formula Fibre (g) = calories ÷ 1000 × 14 and shows the working so you can check each step by hand.
Is the Fiber Intake Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.