HammerCalc’s roof pitch calculator helps framers and roofers turn pitch (rise over 12) into angle, rise, and layout numbers — inside the same roofing calculator workflow as rafters and everyday feet-inch math.
Dial in pitch or slope and see the matching angle and rise over a given run. Use it beside HammerCalc’s rafter tools when you need cut lengths, not just a pitch label on a plan.
Web pitch widgets stop at an angle. HammerCalc keeps pitch, rafters, and dimensional math in one framing calculator so you are not screenshotting numbers between apps on the roof.
Pitch is usually written as rise over 12 of run: pitch = rise / 12. Angle ≈ arctan(rise / run). For a known run: rise = run × (pitch_in_12 / 12). Example: 6/12 pitch → angle ≈ 26.57°.
6/12 pitch → tan⁻¹(6/12) ≈ 26.57° · On a 12 ft run, rise = 6 ft
Plan calls for a 6/12 roof over a 12 ft half-span:
It converts roof slope (usually rise over 12 inches of run) into angle and rise for a given span — the numbers framers use before cutting rafters.
Take arctan(rise ÷ run). For 6/12, arctan(0.5) ≈ 26.57°. HammerCalc’s roof tools show this visually.
Related but not identical. Pitch tools focus on slope and angle; rafter tools turn pitch plus run into cut length. HammerCalc includes both.
Yes. Roof and rafter tools run on iPhone, iPad, and Mac with the same subscription.
Roof pitch, rafters, stairs, square footage — all in HammerCalc.
