Handy shop calculators — no ads, no sign-up, just numbers.
One board foot = 12" × 12" × 1". Thickness uses the rough (quarter) size lumberyards charge by.
Type any one of them: 3/8, 1 5/8, 0.375, or 9.5mm.
Splits a run into equal gaps — the math everyone does wrong on the first try.
How much a flat-sawn board swells or shrinks across its width when moisture changes. Rough guide — wood does what it wants.
Flat-sawn (tangential) values; quarter-sawn moves roughly half as much. A 4% swing ≈ the seasonal indoor change in most of Saskatchewan.
Building a picture frame, planter, or segmented ring? Get the saw setting.
Common bits with exact metric equivalents. For marble dimples on game boards, use a Forstner or brad-point one size under the marble (e.g. 9/16" marble → 1/2" bit).
| Fraction | Decimal (in) | mm | Common use |
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