Gutter Pitch Calculator
Turn a run and a measured drop into a true pitch, or pick a pitch and read the drop — with a live diagram and an instant in-range check.
Enter the run and the height drop between the high end and the outlet — the pitch appears below.
The gutter pitch calculator opens on Check pitch because the most common question is "what pitch does my gutter actually have?" Enter the run and the height drop and it returns the pitch as inches per foot, a grade percentage, a 1:X ratio and an angle, then tells you whether it falls inside the typical drainage band. Switch to Drop to design a new run from a chosen pitch, or Max run to see how far a pitch will carry a given drop.
Common gutter pitches
| Pitch | In/ft | Grade | Verdict |
|---|---|---|---|
| 1/4 in / 10 ft | 0.025 | 0.21% | Minimum |
| 1/2 in / 10 ft | 0.05 | 0.42% | Good general pitch |
| 1/16 in / ft | 0.0625 | 0.52% | Common residential |
| 1/8 in / ft | 0.125 | 1.04% | Steep, fast |
| 1/4 in / ft | 0.25 | 2.08% | Very steep |
Prefer to think in drop per foot rather than pitch? The gutter slope per foot tool focuses on that, and the slope angle tool converts any pitch to degrees.
Questions answered
What is gutter pitch?
How do I calculate gutter pitch?
What pitch should a gutter be?
Is gutter pitch the same as roof pitch?
How do I check the pitch of an existing gutter?
Need the full gutter slope toolkit?
Switch between drop, slope check, max run and downspout planning on the main calculator — with the same live diagram.