How Much Gutter Do You Need?
Enter your total gutter length — get the sections, downspouts, hangers, and accessories to buy, with an optional cost estimate.
Last updated: June 29, 2026
Total Gutter Length (ft)
Add up every roof edge (eave) where gutters mount.
Eave to ground — about 10 ft per story.
Gutter Order Summary
17
gutter sections (10 ft)
Downspouts5 (50 ft)
Hangers / Brackets75
End Caps4
Drop Outlets5
Elbows10
Gutter Size5" K-style
150 ft gutter · 1 downspout / 35 ft · hangers 24" apart · 10% waste
Drop outlet = where a downspout connects to the gutter · Elbow = bend that routes the downspout to the wall & out
Worked Examples
Single-Story Ranch — 150 ft
- 150 ft of gutter · 10 ft downspouts
- 17 sections · 5 downspouts · 75 hangers · 4 end caps · 10 elbows
Two-Story House — 200 ft
- 200 ft of gutter · 20 ft downspouts
- 22 sections · 6 downspouts (120 ft) · 100 hangers · 12 elbows
Detached Garage — 60 ft
- 60 ft of gutter · 10 ft downspouts
- 7 sections · 2 downspouts · 30 hangers · 4 end caps · 4 elbows
Downspout Spacing Guide
| Gutter Run | Downspouts | Notes |
|---|---|---|
| Up to 35 ft | 1 | One per run minimum |
| 35–70 ft | 2 | One at each end is ideal |
| Heavy rain / large roof | More | 1 per 600–800 sq ft of roof drained |
5-inch vs 6-inch Gutters
| Size | Best For | Downspout |
|---|---|---|
| 5" K-style | Most homes, average roofs & rainfall | 2×3 in |
| 6" K-style | Large or steep roofs, heavy rain, few downspouts | 3×4 in |
6-inch gutters carry roughly 40% more water than 5-inch.
Frequently Asked Questions
Measure the length of every roof edge (eave) where water runs off and add them up — that's your total gutter length. Gutters are sold in 10-foot sections, so divide your total by 10 and round up, then add about 10% for waste and overlaps. A typical single-story ranch needs roughly 150 feet, or about 17 sections.
Plan for one downspout per 30-40 feet of gutter, with at least one per gutter run. A common rule is one downspout for every 600-800 sq ft of roof that drains to it. For 150 feet of gutter that's about 4-5 downspouts. Long runs and heavy-rain areas need more so water doesn't overflow.
Space hangers every 24 inches (2 feet) for most climates, and every 18 inches in areas with heavy snow or ice so the gutter can carry the load. At 24-inch spacing, 150 feet of gutter needs about 75 hangers. Always add a hanger near each end and on both sides of a downspout outlet.
5-inch K-style gutters handle most homes. Step up to 6-inch if you have a large roof, a steep pitch that dumps water fast, few places for downspouts, or you live in a heavy-rain region. 6-inch gutters carry almost 40% more water and pair with larger 3×4-inch downspouts.
A complete job also needs hangers or brackets, end caps for the open ends of each run, a drop outlet where each downspout connects, elbows to route the downspout back to the wall and out at the bottom (usually 2 per downspout), plus gutter sealant and screws. This calculator lists each part so you don't make a second store trip.
DIY aluminum K-style gutters run about $4-$9 per linear foot in materials including downspouts and accessories — roughly $600-$1,400 for a typical home. Turn on the cost estimate in Advanced settings to apply your own prices. Hiring a pro adds labor, usually bringing the total to $8-$20 per foot.
Yes. Seamless gutters are one continuous run cut to length on-site instead of bolted 10-foot sections, so just use your total length in feet for ordering coil or getting a quote — the downspouts, hangers, end caps, outlets, and elbows you need are the same. The 'sections' count above is for sectional gutters sold in 10-foot pieces at the store.
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