Dowel Spacing Calculator
Calculate equal center-to-center dowel spacing from joint length, dowel count and end margin.
Results
Dowels
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Center-to-center spacing
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Distance between end margins
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Use the result as a planning estimate and verify project-specific dimensions and product information before ordering or cutting.
How it works
The calculator subtracts the two equal end margins and divides the remaining joint length into one fewer spaces than the number of dowels.
spacing = (joint length − 2 × end margin) ÷ (dowel count − 1)Worked example
Five dowels along a 24 in joint with 2 in end margins are spaced 5 in center to center.
Assumptions
- End margins are equal at both ends.
Limitations
- Dowel diameter, joint strength and material requirements are outside this spacing calculation.