Roof Pitch Calculator - Elementor Compatible

Roof Pitch Calculator

Calculate roof pitch, rafter length, angle, and slope percentage. Enter any two known values to find the rest. Use the pitch multiplier tool to estimate actual roof area.

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Enter any two values and click Calculate — all other fields will be computed automatically
Roof Measurements
m
m
m
Pitch Values
°
%
:12
Please enter at least two values to calculate.
🏠 Results
Run Rise Rafter θ
Roof cross-section diagram
Rise —
Run —
Rafter Length —
Angle —
Slope —
Pitch (x:12) —
Pitch Multiplier —
Roof Type —
Note: Pitch = Rise / Run. Rafter is the hypotenuse (√(Rise² + Run²)). Pitch multiplier = √((Rise/Run)² + 1), used to convert flat area to actual roof area.
📊 Common Roof Pitch Reference Table
Pitch (x:12) Angle (°) Slope (%) Pitch Multiplier Category
1:124.76°8.3%1.003Flat
2:129.46°16.7%1.014Flat
3:1214.04°25.0%1.031Low
4:1218.43°33.3%1.054Conventional
5:1222.62°41.7%1.083Conventional
6:1226.57°50.0%1.118Conventional
7:1230.26°58.3%1.158Conventional
8:1233.69°66.7%1.202Conventional
9:1236.87°75.0%1.250Conventional
10:1239.81°83.3%1.302High
12:1245.00°100.0%1.414High
🔒 Roof Area Calculator (Pitch Multiplier)
Enter your roof's footprint area and pitch ratio to calculate the actual sloped roof area. Uses the formula: Roof Area = Footprint Area × Pitch Multiplier
m²
:12
Pitch Multiplier
—
Actual Roof Area
—