Brick Arch Calculator
Calculate the radius, voussoir count, skewback angle, and arc length for segmental and semicircular brick arches.
Inputs
in
in
in
in
Results
Arch Radius
24.25 in
Voussoir Count
11 bricks
Skewback Angle47.9°
Arc Length40.57 in
Spring Point Offset16.25 in
How to Use This Calculator
- Enter the arch span width (the clear opening) in inches or feet.
- Enter the rise height from the spring line to the crown of the arch.
- Input the brick width (the dimension perpendicular to the arch ring).
- Review the brick count, skewback angle, and joint width at the intrados and extrados.
- Have a licensed mason verify the structural adequacy before construction.
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