Calculator · Joinery & fasteners
Biscuit Size Calculator
The free Biscuit Size Calculator answers one question: Which biscuit (#0, #10, #20) for your stock. Enter your numbers in inches or millimeters and the result updates instantly in your browser, with no sign-up and no app to install. Use it on your phone at the bench, then copy or print the result for your cut list.
Pick the largest biscuit your stock can hide, and space them about 6″ (150 mm) apart.
Biscuit Size
- Biscuit size
- #20
- Slot depth setting
- Center of the stock
- Biscuits along joint
- 5
- Spacing
- 6.5″
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Which other joinery & fasteners calculators help with this project?
- Wood Screw Length Calculator — Right screw length for joining two boards.
- Pilot Hole Size Calculator — Drill bit sizes for wood screws.
- Dado & Rabbet Depth Calculator — Safe dado and rabbet depths for your stock.
- Nail Size (Penny) Calculator — Penny size and length for your board.
- Pocket holes vs. dowels vs. biscuits — Related guide
What you'll need for this project
Tools
Screws & hardware
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Build it · Beginner · 1 weekend
Download the complete plan with cut list and materials list (PDF)
Biscuit-Joined Side Table — Clean modern side table assembled with #20 biscuits—no visible fasteners. Drawings, cut list with board-foot totals, hardware list and step-by-step instructions.