Rafter Help

Rafter Help

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Rafter Help: Professional Rafter & Roof Pitch Calculations

The easiest way for contractors and DIYers to accurately calculate rafter lengths, ridge heights, and pitches. Save time on the job site and eliminate waste with precision framing tools built for your phone.

Publisher

Armchair Engineering

Category

Utilities

Downloads

34K+

User Rating

4.6/5

Total Ratings

700

Locales

1

Precision at a Glance

Discover the interface used by 34K+ users.

Rafter Help app interface showing basic gable roof calculation inputs and diagram

Rafter Help app interface showing basic gable roof calculation inputs and diagram

Rafter Help app interface showing roof geometry diagram and calculated rafter lengths

Rafter Help app interface showing roof geometry diagram and calculated rafter lengths

Advanced rafter calculation interface with technical measurement diagram

Advanced rafter calculation interface with technical measurement diagram

Rafter Help mobile app screen showing roof pitch and rafter length calculations with a technical diagram

Rafter Help mobile app screen showing roof pitch and rafter length calculations with a technical diagram

Settings menu for configuring units angles and decimal precision in the Rafter Help app

Settings menu for configuring units angles and decimal precision in the Rafter Help app

Settings menu of the Rafter Help app showing options for units precision and angle measurements

Settings menu of the Rafter Help app showing options for units precision and angle measurements

Precision Framing Made Simple

The tools that make this app stand out, trusted by 34K+ users.

📐

Instant Math Accuracy

Solve complex rafter equations and ridge heights instantly without manual trigonometry or scrap-wood sketches, saving you time and stress.

🏗️

Built for the Trade

Enter pitch using standard Rise/Run (e.g. 8/12) or degrees to match your blueprints and local building codes perfectly.

📏

Total Unit Flexibility

Work in inches, feet, mm, or cm with adjustable decimal precision to ensure every cut fits the first time and reduces lumber waste.

Loved by users worldwide

Trusted by 34K+ people who love this app.

"

"As a professional framing contractor, I need speed and accuracy on the job site. Rafter Help makes it incredibly easy to calculate pitch and lengths on the fly without pulling out a scientific calculator. The ability to input rise and run directly is a game changer for my workflow. It has already saved me from several expensive miscuts."

Mike D., Independent Contractor
"

"I was nervous about building a custom garden shed because the roof math seemed so daunting. This app made it foolproof. I just plugged in my span and pitch, and it gave me the exact dimensions for my cuts. Everything fit perfectly on the first try, and I did not waste a single piece of lumber!"

Sarah L., DIY Enthusiast

About the app

Everything you need to know about Rafter Help.

Description

Rafter Help is the easiest way to calculate rafter length and associated values when building! Quickly find roof pitch, rafter lengths and ridge height for gable roofs, based on room and ridge width.  Or calculate length values with more control from the Advanced tab. Features Include: - Accurately solve rafter equations - Enter pitch steepness in radians, decimal degrees or degrees, minutes, seconds (DMS) or rise/run (e.g. 8/12) - Enter lengths in mm, cm, inches or feet - Select your preferred number of decimal places

Latest Version

1.5.2

Size

5.6 MB

First Released

Jun 25, 2015

Stop Guessing, Start Cutting

Join over 34,000 builders who eliminate math errors and save on lumber. Download Rafter Help today and get precise measurements in seconds.

Download on App Store