Circle & arc calculator
Circumference, arc length and chord for a radius and an angle, the tape numbers for laying out a rounded edge by hand.
What you enter
- Radius (ft)
- Arc angle (deg)
Main results
- Circumference (ft)
- Arc length (ft)
- Chord (ft)
What it follows
Plain geometry on the radius and angle you type; no building-code table is looked up. It gives tape numbers only and draws nothing on the deck.
Every result is marked REVIEW REQUIRED. Illustrative project-planning values only; jurisdiction, species, grade, loads, wet service and current adopted tables require review. Do not use a result directly for permit, purchase, or field use.
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The calculator opens inside the designer, after you sign in.
Accounts are issued by the DeckAndShed team. There is no self-service sign-up.