Board feet in a 1×4×16
There are two honest answers. The wood you actually carry out of the store is 3.50 board feet — a 1×4 really measures 0.75″ × 3.5″. But if you're pricing or trading lumber, the industry counts this board as 5.33 BF, because board feet are by convention figured on the nominal 1″ × 4″ name.
The math, both ways
trade (nominal): 1″ × 4″ × 192″ ÷ 144 = 5.33 BF
Which one do you want? If you're figuring weight, volume, or "how much wood is that really," use 3.50. If you're comparing against hardwood priced per board foot, or reading a mill tally, use 5.33 — the whole trade runs on nominal, for the historical reasons on our nominal vs actual page. (Construction lumber itself is usually priced per piece, so at the store neither number appears on the shelf tag.)
What a 1×4 is for
The 1×4 is finish carpentry's default: door and window casing, baseboard in modest rooms, fence pickets, lattice frames, and the strapping (furring) that levels old walls and ceilings. Because it's usually visible, 1×4 is sold in more grades than structural sizes — from knotty fence boards to clear primed stock at several times the price.
A quirk worth knowing: "five-quarter" (5/4×4) deck boards live one shelf over. They look like a thick 1×4 but measure a full 1″ thick — decking's answer to the same nominal-size shrinkage story told below.
Sixteen feet is the longest length most yards rack. Boards this long show their flaws: sight down each one for crown (a gentle lengthwise arch) and put the crown up in any joist or rafter so load straightens it. Hauling 16-footers means a rack, a trailer, or the yard's delivery truck.
Heft check: at its true 0.75″ × 3.5″ section, a 16′ board holds 0.29 ft³ of wood — about 10 lb kiln-dried, and closer to 16 lb dripping fresh off the pressure-treated rack.
What that volume costs at hardwood prices
| Price per BF | Actual wood (3.50 BF) | Trade tally (5.33 BF) |
|---|---|---|
| $3.00 | $10.50 | $16.00 |
| $5.00 | $17.50 | $26.67 |
| $7.00 | $24.50 | $37.33 |
| $10.00 | $35.00 | $53.33 |