Guides
The method, written out
Short pages for the arithmetic behind the calculators. Each one names the formula, shows the numbers, and links to the tool that repeats them.
How to Calculate Board Feet (with examples)
The 144 rule, when the name of the board is not the stick you measured, and a waste allowance.
GuideNominal vs Actual Lumber Sizes
The chart of dressed sizes, and why the name on the rack is not the stick you measure.
GuideHow to Calculate Segmented Bowl Ring Angles and Segment Lengths
The miter is 180° divided by the segment count. The length that reaches the finished circle is longer than the chord.
GuideHow to Estimate How Much Plywood You Need
Sheet size, a cut list of rectangles, and the saw kerf that pushes a tight layout onto another sheet.
GuideHow Much Does a Board Expand and Contract?
Flat-sawn boards move more than quarter-sawn ones. The change is width times a coefficient times the moisture swing.
GuideHow to Make a Cut List for a Woodworking Project
Parts from the drawing, then the boards and the sheets, with joinery, kerf, and a bookcase you can check.