Premium Lean-to Roof Angle Converter

The Ultimate Professional Roofing Calculator for Contractors

Version 2.2.0 | All-in-one tool for calculating roof pitch, angles, rafter lengths, and conversions. No other tool needed!

Rise & Run

Angle to Rise

Pitch to Angle

Rafter Length

Rise

inches per foot

Run feet

Roof Angle (degrees)

Run Distance feet

Roof Pitch

Pitch as rise/run or decimal

Common Roof Pitches Reference:

Pitch	Angle	Slope %	Rise per 12"
2/12	9.46°	16.7%	2"
3/12	14.04°	25%	3"
4/12	18.43°	33.3%	4"
5/12	22.62°	41.7%	5"
6/12	26.57°	50%	6"
8/12	33.69°	66.7%	8"
10/12	39.81°	83.3%	10"
12/12	45°	100%	12"

Building Width (Run) feet

Roof Angle (degrees)

Roof Visualization

Current calculation visualized: Rise: 6", Run: 12 ft

Settings

Measurement Units

Decimal Precision

Color Theme

Professional

Dark Mode

Contractor

Calculation History

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Saved Calculations

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