Skip to main content

How to Calculate Gutter

What is Gutter?

A gutter sizing calculator determines the correct gutter width and downspout placement for a roof, based on roof area, rainfall intensity, and gutter slope. Undersized gutters overflow during heavy rain, causing foundation and landscape damage. Standard residential gutters are 5 or 6 inches wide.

Step-by-Step Guide

  1. 1Input base values
  2. 2System computes results

Worked Examples

Input
Enter the required values
Result
Result computed by the formula

Common Mistakes to Avoid

  • Precision loss
  • Ignoring variables

Frequently Asked Questions

What does this calculator do?

Input base values

How do I use this calculator?

System computes results

Ready to calculate? Try the free Gutter Calculator

Try it yourself →

Settings

PrivacyTermsAbout© 2026 PrimeCalcPro