Wood Turning Blank Size Calculator
Wood Turning Blank Size
Calculate the minimum wood blank dimensions needed for turned bowls, spindles, and vessels including waste allowance.
Formula
Blank Diameter = Finished Diameter + (Waste Margin x 2); Blank Thickness = Finished Height + Chuck Allowance + Waste Margin; Board Feet = (Pi x r^2 x Thickness) / 144
Frequently Asked Questions
How much extra wood do I need for turning?
Add at least 1 inch to the diameter and 0.75 to 1 inch to the height for waste from truing, tenon creation, and final finishing cuts.
What is a tenon in wood turning?
A tenon is a cylindrical nub left on the bottom of a bowl blank that fits into a chuck to hold the piece securely on the lathe during turning.
What wood is best for turning?
Cherry, maple, walnut, and ash are excellent turning woods. Green (wet) wood is easier to turn but must be dried slowly to prevent cracking.