Gutters and downspouts
Gutter hanger spacing calculator
Apply selected hanger spacing. Selected product spacing is available.
Try the calculation
Use tighter spacing where the product or site conditions require it.
Adjustable example. Change these illustrative inputs to match your task, then recalculate. Reset restores the example and its result.
Understand the result
How this calculation works
This hanger count uses a tighter selected spacing for a gutter run.
Steps
- Enter the measured length and the spacing you need to compare.
- Match the spacing to the product or site requirement.
The form starts with the worked example below. Change its values and selections to match your task; Reset restores the example.
Formula
hangers = ceiling(length × 12 ÷ spacing).
Variables and units
- Run length (ft)
- Required. Use a positive value. Starting example: 40. Replace it for your task.
- Hanger spacing (in)
- Required. Use a positive value. Starting example: 18. Replace it for your task.
What the result means
The result uses the entered spacing only. Snow-load support spacing must be specified separately.
Worked example
Inputs: Run length = 40; Hanger spacing = 18.
Calculation: 40 ft × 12 ÷ 18 in = 26.667, so 27 hangers.
Result: 27 hangers.
Frequently asked questions
Why is this separate from the other hanger page?
It represents a tighter spacing task.
Does it include corners?
No.
Should I choose 18 inches everywhere?
Follow the product and site requirements for the project.