Daily Fiber Intake Calculator Formula

Understand the math behind the daily fiber intake calculator. Each variable explained with a worked example.

Use the Daily Fiber Intake Calculator

Formulas Used

Recommended Fiber

fiber_grams = daily_calories / 1000 * 14

Soluble Fiber Target

soluble_fiber = daily_calories / 1000 * 14 * 0.25

Insoluble Fiber Target

insoluble_fiber = daily_calories / 1000 * 14 * 0.75

Variables

VariableDescriptionDefault
daily_caloriesDaily Calorie Intake(kcal)2000

How It Works

How Fiber Recommendations Work

The Dietary Guidelines for Americans recommend 14 grams of fiber for every 1,000 calories consumed.

Formula

Fiber (g) = (Daily Calories / 1000) x 14

About 25% should come from soluble fiber and 75% from insoluble fiber.

Worked Example

A person consuming 2,000 calories per day.

daily_calories = 2000
  1. 01Fiber = (2000 / 1000) x 14 = 28 g
  2. 02Soluble fiber = 28 x 0.25 = 7 g
  3. 03Insoluble fiber = 28 x 0.75 = 21 g

Ready to run the numbers?

Open Daily Fiber Intake Calculator