Convert roof pitch between formats and work out slope length, roof area and rise. Useful for re-roofing quotes, solar layouts and loft conversions.
°
As ratio (rise:12)
0 : 12
As percentage
0%
m
m
TOTAL ROOF AREA
0 m²
0 ft²
Slope / rafter length
0
Roof rise
0
Pitch multiplier
1.00
Roof covering & estimated cost
Pitch is suitable35° is above the recommended minimum (17.5°) for this covering.
£
£
%
Pitch reference: Slate roofs typically need ≥ 22.5°. Plain clay tiles ≥ 35°. Interlocking concrete tiles ≥ 17.5°. Standing seam metal works from 3°. Typical UK domestic pitch is 30-45°.
Excludes eaves overhang, ridge details, hips and valleys. For hipped or complex roofs add ~3-5% to allow for cutting waste, hips and valleys. For guidance only - measure on site before ordering materials.