Free tool
Lumber Calculator
Board feet, drying time, green weight, and log yield. Built by someone who actually uses a sawmill.
Rough sawn thickness
Average board width
Board length
Number of boards
Result
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board feet
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Quick reference
1 board foot = 144 in³
Air dry rule 1 yr / inch
WM3 kerf ~0.055"
Green→dry shrink ~8% (oak)
Sticker spacing 16–24"