Roof Pitch Calculator Degrees Metric

This roof pitch calculator helps you determine the angle of your roof in degrees using metric measurements. Whether you're a homeowner, contractor, or DIY enthusiast, understanding your roof's pitch is essential for proper installation, maintenance, and safety.

How to Use This Calculator

Using this roof pitch calculator is simple:

Enter the rise of your roof in meters (vertical distance from the eave to the ridge).
Enter the run of your roof in meters (horizontal distance between the two points where the rise is measured).
Click the "Calculate" button to see your roof's pitch in degrees.
Review the result and any additional information provided.

The calculator will display the roof pitch in degrees and provide additional context about what this means for your roof.

What Is Roof Pitch?

Roof pitch refers to the steepness of a roof, measured as the angle between the horizontal and the sloping surface of the roof. It's typically expressed in degrees or as a ratio (rise over run).

A low-pitched roof has a gentle slope, while a high-pitched roof has a steep slope. The pitch affects drainage, structural requirements, and the type of roofing materials needed.

How to Measure Roof Pitch

Measuring roof pitch involves determining both the rise and run:

Rise: Measure the vertical distance from the eave (lowest point) to the ridge (highest point) of the roof.
Run: Measure the horizontal distance between the two points where the rise is measured.

For example, if your roof rises 1 meter vertically over a 2-meter horizontal distance, your roof pitch ratio is 1:2.

Always measure from the same point on both sides of the roof for accurate results.

Common Roof Pitches

Different roof pitches are used for various purposes:

Pitch Ratio	Degrees	Typical Use
1:12	4.76°	Low-pitched roofs for residential areas with heavy snowfall
1:8	7.13°	Gentle residential roofs
1:6	9.46°	Common residential roofs
1:4	14.04°	Moderate-pitched roofs for drainage
1:3	18.43°	Steep residential or commercial roofs
1:2	26.57°	Very steep roofs for drainage

Understanding these common pitches can help you choose the right roof for your needs.

Roof Pitch Formula

The roof pitch in degrees can be calculated using the arctangent function:

Roof Pitch (degrees) = arctan(Rise / Run) × (180 / π)

Where:

Rise: Vertical distance in meters
Run: Horizontal distance in meters
π: Mathematical constant (approximately 3.14159)

For example, if your roof has a rise of 1 meter and a run of 2 meters:

Roof Pitch = arctan(1 / 2) × (180 / π) ≈ 26.57°

This means your roof has a pitch of approximately 26.57 degrees.

Frequently Asked Questions

What is the difference between roof pitch and slope?

Roof pitch and slope both refer to the steepness of a roof. Pitch is typically expressed as a ratio (rise over run) or in degrees, while slope is often expressed as a percentage. For example, a 1:6 pitch is equivalent to a 16.67% slope.

How does roof pitch affect drainage?

A steeper roof pitch (higher degree) allows water to run off more quickly, reducing the risk of leaks and ice dams. A gentler pitch may require additional drainage systems.

Can I convert roof pitch from ratio to degrees?

Yes, you can convert a roof pitch ratio (rise:run) to degrees using the formula: degrees = arctan(rise/run) × (180/π). This calculator does this conversion automatically.

What is the standard roof pitch for residential buildings?

The standard roof pitch for residential buildings typically ranges from 1:6 (9.46°) to 1:12 (4.76°), depending on local building codes and climate conditions.