Gutter Calculator
Calculate total gutter length and downspouts needed. Enter roof length, sections, and downspout spacing.
How to Use the Gutter Calculator
- Enter the roof edge length.
- Enter the number of gutter sections.
- Enter the downspout spacing.
- Click Calculate for totals.
Quick Reference
| From | To |
|---|---|
| Small roof (6 m) | 6 m gutter, 1 downspout |
| Medium roof (12 m) | 12 m, 2 downspouts |
| Large roof (20 m × 2) | 40 m, 4–6 downspouts |
| Standard gutter | 125 mm half-round |
| Downspout | 75 mm round |
| Spacing max | ~10–12 m |
Use Cases
- •Planning a new gutter installation.
- •Replacing existing gutters.
- •Budgeting rainwater drainage.
- •Sizing gutter systems for additions.
Formula
Total gutter = Roof length × Sections. Downspouts = ceil(Total gutter / Downspout spacing).
Frequently Asked Questions
How far apart should downspouts be?
Typically every 6–12 meters depending on rainfall and gutter size.
What are sections?
The number of roof edges that need gutters (e.g., 2 for a gable roof).
Is it free?
Yes, all calculators are completely free.