Board foot chart
Board feet in a 4/4 board by width and length, and in a store 1x or 2x board by length. Every figure comes from the calculator, so it counts as the calculator counts.
4/4 boards: width and length
Width in inches down the side, length in feet across the top. A 4/4 board is 1 inch thick.
| Width | 6 ft | 8 ft | 10 ft | 12 ft | 14 ft | 16 ft |
|---|---|---|---|---|---|---|
| 3 in | 1.50 | 2 | 2.50 | 3 | 3.50 | 4 |
| 4 in | 2 | 2.67 | 3.33 | 4 | 4.67 | 5.33 |
| 5 in | 2.50 | 3.33 | 4.17 | 5 | 5.83 | 6.67 |
| 6 in | 3 | 4 | 5 | 6 | 7 | 8 |
| 7 in | 3.50 | 4.67 | 5.83 | 7 | 8.17 | 9.33 |
| 8 in | 4 | 5.33 | 6.67 | 8 | 9.33 | 10.67 |
| 9 in | 4.50 | 6 | 7.50 | 9 | 10.50 | 12 |
| 10 in | 5 | 6.67 | 8.33 | 10 | 11.67 | 13.33 |
| 11 in | 5.50 | 7.33 | 9.17 | 11 | 12.83 | 14.67 |
| 12 in | 6 | 8 | 10 | 12 | 14 | 16 |
Other thicknesses
Board feet go up in step with the thickness. Multiply a figure from the table by the factor for the thickness:
| Called | Thick | Multiply by |
|---|---|---|
| 4/4 | 1″ | 1 |
| 5/4 | 1¼″ | 1.25 |
| 6/4 | 1½″ | 1.5 |
| 8/4 | 2″ | 2 |
What 4/4 means has the standard thicknesses.
Store sizes: board feet in one board
Counted at the name, as the calculator counts a store size, by length in feet. The last column is the board feet in one foot of length, so you can scale to any length.
| Size | 8 ft | 10 ft | 12 ft | 16 ft | Per foot |
|---|---|---|---|---|---|
| 1×4 | 2.67 | 3.33 | 4 | 5.33 | 0.33 |
| 1×6 | 4 | 5 | 6 | 8 | 0.50 |
| 1×8 | 5.33 | 6.67 | 8 | 10.67 | 0.67 |
| 1×10 | 6.67 | 8.33 | 10 | 13.33 | 0.83 |
| 1×12 | 8 | 10 | 12 | 16 | 1 |
| 2×4 | 5.33 | 6.67 | 8 | 10.67 | 0.67 |
| 2×6 | 8 | 10 | 12 | 16 | 1 |
| 2×8 | 10.67 | 13.33 | 16 | 21.33 | 1.33 |
| 2×10 | 13.33 | 16.67 | 20 | 26.67 | 1.67 |
| 2×12 | 16 | 20 | 24 | 32 | 2 |
| 4×4 | 10.67 | 13.33 | 16 | 21.33 | 1.33 |
A store size counts at its nominal size, not at what the wood measures. [PS 20-20, section 2.2] See nominal vs actual sizes. For a size or length not in the tables, use the calculator.
How this was checked
The numbers on this page come from a port of the Board Foot Calculator iPhone and iPad app’s engine, and an automated test compares them with the app’s own code on well over a hundred thousand inputs (last run ). Statements about lumber are quoted from the USDA Forest Products Laboratory’s Wood Handbook and the American Softwood Lumber Standard, linked where they appear. Your lumberyard’s ticket is what you pay, so ask how it counts a board. If something here is wrong, tell us at a@noshu.net.