Gutter & Downspout Capacity

See if your gutters can handle rainfall for roof area.

Roof drainage area (sq ft)

Rain intensity (in/hr)

Gutter capacity (gpm per 100 ft)

Total gutter length (ft)

Downspout capacity each (gpm)

Est. peak flow needed (gpm)

Rough system capacity (gpm)

732

Status

Adequate

Rules of thumb vary by profile and slope. Clean gutters and proper pitch matter.