How Many Board Feet in a 4×4×8?
4×4 board feet by length
| Size | Board feet | Pieces per 100 bf |
|---|---|---|
| 4×4×6 | 8.00 | 13 |
| 4×4×8 | 10.67 | 10 |
| 4×4×10 | 13.33 | 8 |
| 4×4×12 | 16.00 | 7 |
| 4×4×14 | 18.67 | 6 |
| 4×4×16 | 21.33 | 5 |
The 4×4×8 is typical stock for posts — fence, deck, pergola. Ordering for a whole plan? It takes 10 pieces of 4×4×8 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 4×4 isn't really 4″ × 4″
Every 4×4×8 starts life rough-sawn at (close to) its nominal size, then loses material to drying and surfacing — which is how a 4×4 arrives at the store measuring 3½″ × 3½″. 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 10.67 bf. Measure a 4×4×8 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 4×4×8 weigh?
Handy when you're loading the truck: at 10.67 board feet, a kiln-dried SPF (spruce-pine-fir) 4×4×8 runs about 24.9 lb, and a denser southern yellow pine version about 32 lb. Fresh, still-wet stock is heavier — roughly 30.2 lb (SPF green) to 48.9 lb (SYP green). A 50-piece framing lift of 4×4×8s is therefore on the order of 1245–1600 lb dry, which is real payload. Species-by-species figures live in the lumber weight calculator.