Roof Pitch Calculator

Calculate roof pitch, angle, rise, run, and slope percentage with visual roof preview. Supports multiple input methods for accurate roofing calculations.

Calculate Roof Pitch

Results

Select an input method and enter measurements to calculate roof pitch

Roof Visualization

Rise Run

What is Roof Pitch Calculator

Roof pitch is one of those things that sounds complicated until it's explained clearly. Whether you're planning a new roof, checking an existing one, or just trying to understand contractor measurements, knowing your roof pitch makes everything easier.

This Roof Pitch Calculator is designed to remove confusion. You can enter simple measurements like rise and run, or even an angle, and the calculator instantly shows the pitch in all common formats. There's no need to memorize formulas or do manual conversions.

What makes this tool especially useful is the visual preview. As you enter your measurements, the roof slope updates on screen, helping you see exactly what the numbers mean. This makes it helpful not only for professionals, but also for homeowners and DIY builders.

The results are presented clearly, showing pitch, angle, and slope percentage together. This makes it easy to compare values, share information with contractors, or use the results for planning materials and design.

Whether you're working on a small repair or a full roofing project, this calculator gives you clear, reliable answers without the technical headache. It's built to be simple, accurate, and easy for anyone to use.

How to Use the Roof Pitch Calculator

1

Choose Input Method

Select rise & run measurements, roof angle, or slope percentage.

2

Enter Measurements

Input your roof measurements using your preferred units.

3

Get All Formats

Receive pitch ratio, angle, percentage, and roof classification.

Understanding Roof Pitch

What is Roof Pitch?

Roof pitch (also called roof slope or roof gradient) is the steepness of a roof expressed as a ratio of rise to run. It's a crucial measurement that affects everything from material selection to building codes and drainage.

Common Roof Pitch Categories

Category Pitch Range Angle Range Typical Use
Flat 0:12 to 2:12 0° to 10° Modern homes, commercial buildings
Low 2:12 to 4:12 10° to 18° Traditional homes
Medium 4:12 to 8:12 18° to 33° Most residential roofs
Steep 8:12 to 12:12 33° to 45° Areas with heavy snow/rain
Very Steep 12:12+ 45°+ Mountain regions, specialty roofs

How to Measure Roof Pitch

For existing roofs, measure the rise (vertical distance from eave to ridge) and run (horizontal distance from eave to ridge center). For new construction, pitch is typically specified in building plans. Always measure carefully and double-check calculations, as roof pitch affects structural design and material choices.