How Many Board Feet in a 2×8×12?
2×8 board feet by length
| Size | Board feet | Pieces per 100 bf |
|---|---|---|
| 2×8×6 | 8.00 | 13 |
| 2×8×8 | 10.67 | 10 |
| 2×8×10 | 13.33 | 8 |
| 2×8×12 | 16.00 | 7 |
| 2×8×14 | 18.67 | 6 |
| 2×8×16 | 21.33 | 5 |
The 2×8×12 is typical stock for floor joists, small headers. Ordering for a whole plan? It takes 7 pieces of 2×8×12 to reach 100 board feet — tally the real cut list, mixed sizes and all, in the board foot calculator and print it as a slip for the yard.
Worth remembering: dimensional softwood like this usually sells by the piece, not by the board foot — but the BF figure still matters for comparing costs across sizes, estimating framing packages, and talking to mills. Hardwood in random widths is where per-BF pricing rules; see the price table for what species run per board foot.
Why a 2×8 isn't really 2″ × 8″
Every 2×8×12 starts life rough-sawn at (close to) its nominal size, then loses material to drying and surfacing — which is how a 2×8 arrives at the store measuring 1½″ × 7¼″. The nominal-size convention is written into the American Softwood Lumber Standard (NIST PS 20), and it governs everything downstream: the label on the rack, the invoice, span tables and this page's board-foot figure of 16 bf. Measure a 2×8×12 with calipers and punch the actual size into a calculator, and you'll come up about a quarter short of what the yard will charge you for — always figure nominal.
What does a 2×8×12 weigh?
Handy when you're loading the truck: at 16 board feet, a kiln-dried SPF (spruce-pine-fir) 2×8×12 runs about 37.3 lb, and a denser southern yellow pine version about 48 lb. Fresh, still-wet stock is heavier — roughly 45.3 lb (SPF green) to 73.3 lb (SYP green). A 50-piece framing lift of 2×8×12s is therefore on the order of 1865–2400 lb dry, which is real payload. Species-by-species figures live in the lumber weight calculator.