Calculator · Geometry & layout
Circle Calculator
The free Circle Calculator answers one question: Circumference and area for round tabletops. 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.
Enter the diameter of a round top, lazy susan or edge band.
Which other geometry & layout calculators help with this project?
- Diagonal & Squareness Calculator — Check a carcass or frame for square.
- Polygon Side Length Calculator — Side length for hexagons, octagons and more.
- Arc Radius Calculator — Radius from the chord width and arc height.
- Hexagon Calculator — Across flats, across corners and area from side length.
What you'll need for this project
Tools
Screws & hardware
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Build it · Intermediate · 1 weekend
Download the complete plan with cut list and materials list (PDF)
Round Coffee Table — 36″ round top on a cross-lap base. Drawings, cut list with board-foot totals, hardware list and step-by-step instructions.