# Roof Pitch Calculator

> Calculate roof pitch from rise and run. Returns pitch in the U.S. x/12 convention, angle in degrees, slope percent, and the roof-surface multiplier for converting plan area to actual sloped roof area.

**URL:** https://www.calculatoranswers.com/roof-pitch-calculator
**Category:** Home

## Quick Answer

Calculate your roof's pitch, angle, and grade. Enter the rise and run measurements to find the slope and shingle requirements.

## Definition

A roof pitch calculator is a construction geometry utility that determines the slope of a building's roof. The calculator processes the vertical rise and horizontal run measurements, outputting the pitch ratio (expressed as inches of rise per twelve inches of run), the slope angle in degrees, and the grade percentage. It also calculates the roof factor multiplier, which is used to estimate true surface area from flat blueprints. Carpenters, roofing contractors, and DIY homeowners use this tool to estimate shingle materials and verify safety requirements.

## How to Use

1. **Enter rise and run** — Type the vertical height rise and the horizontal distance run measurements of the roof.
2. **Choose measurement unit** — Select your units of measurement, such as inches, feet, or centimeters.
3. **Read pitch values** — View the roof pitch ratio, slope angle in degrees, and the calculated area multiplier factor.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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