Printable Roof Pitch Gauge
Calibration checked · How we check
Every common pitch from 1/12 to 12/12 drawn from one corner, each labelled with its angle. Hold the bottom edge level against a rafter or gable end and read off the line that matches the slope.
Before you print
- Set the print scale to 100% — not “fit to page”, which shrinks by a few percent.
- Print, then measure the reference bar below with a ruler you trust.
- If it is not exactly 100 mm, type what you measured and print again.
Printed at 100% on A4 or US Letter. Paper stretches with humidity, so re-check the reference bar if precision matters.
What it is for
- —Reading a pitch off a gable from the ground, with no ladder.
- —Checking a roofer’s quoted pitch before ordering shingles.
- —Converting between the pitch a builder quotes and the degrees a saw needs.
Why the calibration step exists
The drawing is exact — every mark is placed in absolute units, so a millimeter in the file is a millimeter on paper. What is not exact is the path from file to sheet. Print dialogs default to fitting the page, which rescales by a few percent, and printers differ from each other regardless. Nothing in a web page can detect that; only measuring the printed sheet can. The reference bar is there so the error is visible in one look, and the scale field is there so you can cancel it out.