1Edge Joint (3/4" Stock)
Inputs
Thickness0.75"
Joint Length12"
Dowel3/8"
Result
Dowels Needed5
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Dowel Joint Calculator
Dowels Needed
4
Length Each
0.962"
Drill Bit
0.375"
Dowels Needed
4
Dowel Length
0.962"
Depth Per Side
0.45"
Drill Bit
0.375"
What You'll Need
Milescraft 1333 DowelJig Kit - Self-Centering Handheld Dowel Jig with 3 Metal Bushing Sizes (1/4in, 5/16in, 3/8in) - Complete with all Accessories
$24.99
View on Amazon
WEN JN400D 400-Piece Fluted Dowel Pin Variety Bucket with 1/4, 5/16, and 3/8-inch Woodworking Dowels
$11.99
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Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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Example Calculations
2Face Frame (1/2" Stock)
Inputs
Thickness0.5"
Joint Length3"
Dowel1/4"
Result
Dowels Needed2
Frequently Asked Questions
QWhat size dowel should I use?
The dowel diameter should be no more than half the board thickness. For 3/4" stock, use 3/8" dowels. For 1/2" stock, use 1/4" dowels. This prevents splitting while maximizing joint strength.
- Rule: dowel diameter ≤ 1/2 board thickness
- 3/4" stock: use 3/8" dowels
- 1/2" stock: use 1/4" dowels
- 1" stock: use 1/2" dowels
- Too large risks splitting the wood
QHow deep should dowel holes be?
Drill each side to 1.5x the dowel diameter depth, with a small gap (1/16") for glue squeeze-out. For 3/8" dowels, drill about 9/16" deep into each board, making the total dowel length about 1-3/16".
- Depth per side: 1.5× dowel diameter
- Leave 1/16" gap for excess glue
- Total dowel length = 2× depth + gap
- Never exceed 60% of board thickness per side
QHow far apart should dowels be spaced?
Space dowels 2-4 inches apart for edge joints, with 1-2 inches from each end. For most 3/4" stock applications, 3" spacing provides good strength without weakening the wood.
- Edge joints: 2–4" spacing
- Face frames: 2–3" spacing
- Keep 1–2" from board ends
- 3" is a good default for 3/4" stock
QDo I need a doweling jig?
A doweling jig is highly recommended for accurate hole alignment. Even 1/32" misalignment can prevent the joint from closing. Self-centering dowel jigs cost $20-50 and dramatically improve accuracy.
- Misalignment of 1/32" causes gaps
- Self-centering jigs start around $20
- Mark boards together before drilling
- Use dowel centers for transfer marking
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Last Updated: Jul 24, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.