Arch Calculator
This **Arch Calculator** helps you determine the dimensions for a circular arch. Accurately calculating the **Radius**, **Span (Chord)**, and **Rise (Segment Height)** is essential for masonry, carpentry, and architectural design to ensure a perfect curve. Enter any two values to solve for the third.
Get instant results for setting out and constructing segment arches for doorways, windows, or decorative structures.
The key components of a segment arch: Span (W), Rise (H), and Radius (R).
Circular Arch Dimension Tool
Enter any two measurements (Span, Rise, or Radius) to calculate the third.
Calculation Results
Span (Chord): --
Rise (Height): --
Radius: --
Essential Arch Terminology
Span (Chord)
The straight-line horizontal distance between the two spring points of the arch.
Rise (Height)
The vertical distance from the center of the span line up to the highest point of the inner curve.
Radius
The constant distance from the center point of the circle to the curve of the arch.