About this calculator
A complete gutter takeoff: sections, hangers, end caps, outlets, corners and the downspouts with their bends and clips.
How it’s calculated
Each run gets enough outlets that no length of gutter exceeds your maximum per outlet. Hangers go every 24". The number of drops follows the eaves height.
Worked example
With these inputs:
- Total eaves length
- 120 ft
- Separate gutter runs
- 2
- Corners (inside or outside)
- 0
- Eaves height
- 10 ft
- Max gutter length per outlet
- 35 ft
the result is:
- Gutter sections
- 13 × 10 ft
- Outlets / drops
- 4
- Hangers @ 24"
- 62
Tips from the trade
- Fall toward the outlet: about ¼" per 10 ft.
- Put outlets near valleys, which dump a lot of water.
- Add a corner fitting for every change of direction.
Results are estimates for planning and pricing. Check quantities against your drawings, the manufacturer’s data and local building codes before ordering.