Gutter Size Calculator
Calculate gutter size based on roof area and rainfall.
Recommended Gutter Size
6" K-Style
Downspout: 3" × 4" × 2 units
Adjusted Area
1650 ft²
Water Flow
68.6 GPM
Gutter Length
40 ft
Downspouts
2
| Gutter Size | Capacity (ft²) | Downspout | Status |
|---|---|---|---|
| 5" K-Style | 1380 ft² | 2" × 3" | Too small |
| 6" K-Style | 1990 ft² | 3" × 4" | OK |
| 5" Half-Round | 1156 ft² | 3" Round | Too small |
| 6" Half-Round | 1766 ft² | 4" Round | OK |