Sizing

5" vs 6" Gutters: Which Size Do You Need?

Last updated: May 23, 2026 · Reading time ~5 min

5-inch K-style gutters are the right choice for most Kansas City ranches and 1-story homes (up to ~2,500 sq ft of roof). 6-inch gutters are right for 2-story homes, homes with steep roofs (8/12 pitch or greater), or homes with roof areas over 2,500 sq ft. 6" handles ~40% more water for about 15% more cost.

The math on capacity

5" K-style gutter holds about 1.2 gallons per linear foot at maximum fill. 6" K-style holds about 1.7 gallons. That's a 40% capacity increase for a 20% width increase.

When 5" is fine

Single-story ranch, hip or gable roof, less than 2,500 sq ft of roof area, average pitch (5/12 to 7/12). 90% of KC ranches fall in this bucket.

When to upsize to 6"

Any of: two-story home, steep roof (8/12+), large roof (2,500+ sq ft), history of overflow, single downspout draining 30+ ft of gutter, or aesthetic preference (6" looks more proportional on big houses).

Frequently asked

Does 6" cost a lot more?

About 15% more per linear foot ($1-$2/ft difference). Worth it on the right house.

Can I have 5" front, 6" back?

Yes — common when the rear elevation has more roof area drainage.

What about 7" or 8" gutters?

Available but rare in residential. Almost always commercial.

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