Woodturning calculators
Free calculators for the shop math that comes up around the lathe: figuring board feet when you buy lumber, picking a safe speed for a blank, and cutting segments that close into a clean ring. Each one runs in your browser and updates as you type.
Board foot calculator
Enter thickness, width, length, and quantity to get board feet per piece and the total, with cost from a price per board foot. Handles 4/4 to 16/4 quarter presets and a cut list.
Open calculator →Lathe speed calculator
Enter a blank diameter for a safe RPM range from the shop rule of thumb, with a slower start figure for out-of-round or unbalanced blanks.
Open calculator →Segmented turning calculator
Enter segments per ring and outside diameter to get the miter cut angle, included angle, outer segment length, and total strip length with a waste allowance.
Open calculator →