23/12 roof pitch

62.45° angle

A 23/12 roof rises 23 in for every 12 in of run: a 191.7% slope with a 2.162 area multiplier.

Pitch23 in 12 (23:12)
Angle62.45°
Slope191.7%
Roof area multiplier2.1619
Rafter length per foot of run25.94 in
TypeA very steep roof

Roofing for a 23/12 pitch

Suitable for asphalt shingles, metal, tile and most other roofing with standard underlayment. Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.

Rafter length at 23/12

Run (half the span)RiseRafter length (before overhang)
10 ft19.17 ft21.62 ft
12 ft23 ft25.94 ft
14 ft26.83 ft30.27 ft
16 ft30.67 ft34.59 ft

Change the numbers

Roof pitch

23/12

62.45° angle, 191.7% slope.

Pitch23 in 12
Angle62.45°
Slope191.7%
Roof area multiplier2.1619
Rafter length per foot of run25.94 in

Other roof pitches

Questions

What angle is a 23/12 roof pitch?
62.45 degrees.
What is a 23/12 roof pitch as a percentage?
191.7%: the roof rises 23 inches for every 12 inches of run.
What is the roof multiplier for a 23/12 pitch?
2.162. Multiply the roof’s flat footprint by 2.162 to get its actual surface area.
Is a 23/12 roof walkable?
Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.

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