Trade-tally (nominal) board feet for common construction sizes — the convention the lumber industry prices by. Every size links to a page with the actual-wood figure too, which is smaller, since a "2×4" really measures 1-1/2″ × 3-1/2″.
| Size | 8′ | 10′ | 12′ | 16′ |
|---|---|---|---|---|
| 1×2 | 1.33 | 1.67 | 2.00 | 2.67 |
| 1×3 | 2.00 | 2.50 | 3.00 | 4.00 |
| 1×4 | 2.67 | 3.33 | 4.00 | 5.33 |
| 1×6 | 4.00 | 5.00 | 6.00 | 8.00 |
| 1×8 | 5.33 | 6.67 | 8.00 | 10.67 |
| 1×10 | 6.67 | 8.33 | 10.00 | 13.33 |
| 1×12 | 8.00 | 10.00 | 12.00 | 16.00 |
| 2×2 | 2.67 | 3.33 | 4.00 | 5.33 |
| 2×3 | 4.00 | 5.00 | 6.00 | 8.00 |
| 2×4 | 5.33 | 6.67 | 8.00 | 10.67 |
| 2×6 | 8.00 | 10.00 | 12.00 | 16.00 |
| 2×8 | 10.67 | 13.33 | 16.00 | 21.33 |
| 2×10 | 13.33 | 16.67 | 20.00 | 26.67 |
| 2×12 | 16.00 | 20.00 | 24.00 | 32.00 |
| 4×4 | 10.67 | 13.33 | 16.00 | 21.33 |
| 4×6 | 16.00 | 20.00 | 24.00 | 32.00 |
| 6×6 | 24.00 | 30.00 | 36.00 | 48.00 |
The 2×10 and 2×12 also come in 20′ lengths — see those sizes' pages. Buying hardwood instead? Hardwood uses quarter thicknesses — see nominal vs actual — and the planner handles any size.