WoodCalcs.uk
Taper Calculator — Angles & Jig Settings
Calculate taper angles and jig settings for tapered legs and wedges.
How We Calculate This
This calculator determines the taper angle and per-side material removal for creating tapered components.
Formulas
Taper per side = (Wide end - Narrow end) / 2
Taper angle = arctan(Taper per side / Length)
The jig offset for a table saw taper jig equals the taper per side measurement. The taper ratio expresses the relationship as 1:n (e.g., 1:20 means 1mm taper per 20mm length).
Frequently Asked Questions
Use a taper jig (tapering sled) on the table saw. Set the jig so that the narrow end of the taper is against the jig fence and the wide end passes the blade. The jig offset equals the taper per side. Always use push sticks and keep hands clear of the blade.
A typical table leg taper reduces from 60-70mm at the top to 30-40mm at the foot, with the taper starting below the apron. This gives a taper angle of about 1-3 degrees per side. Both inner faces are usually tapered, with the outer faces remaining straight.
Taper per foot (TPF) = (Wide end - Narrow end) / Length in feet. In metric, use taper per metre: (Wide - Narrow) / Length in metres. This calculator gives the taper per side (half the total taper) and the angle.
Yes, mark the taper line on all four faces, then use a jack plane or jointer plane to remove material down to the line. Start with heavy cuts at the narrow end and lighter cuts towards the wide end. This method gives excellent results on short tapers.
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Last updated: February 2026
All calculations are estimates. Always verify measurements and material quantities before cutting or purchasing.