Lumber Calculators
Lumber has a units trap at its center: board feet are computed on nominal dimensions (a 2x4 counts as 2 by 4) while weight and fit depend on actual dimensions (that same stick measures 1.5 by 3.5). Mixing the two silently is how tally sheets and truck springs both get surprised. Each calculator here states which dimension system it's using and why.
Not Sure Where to Start?
Linear Foot to Board Foot Calculator is the one most people need. The linear-foot conversion is where the nominal-versus-actual trap first bites. Start here and the rest of the board-foot math follows.
Board-Foot Math
The closed-form definition, applied to linear footage and to pricing by the board foot.
- Linear Foot to Board Foot CalculatorConvert linear feet to board feet with bf/lf = (thickness x width) / 12. A 2x6 works out to exactly 1 board foot per linear foot, at any length, no rounding.
- Board Foot Price CalculatorMultiply board feet by your own price per board foot: hardwood costs vary too much by species, grade, and region for us to publish a number. Enter yours.
Cost and Weight
Sampled retail prices on the cost side; actual dimensions and species density bands on the weight side.
- Lumber Cost CalculatorTurn board feet into a total price at your own $/bf rate, benchmarked against a sampled 2x4x8 stud retail price for context. Full sourcing at /methodology/.
- Lumber Weight CalculatorEstimate lumber weight from actual dressed dimensions and a species density band. A stated 2x4 measures 1.5 by 3.5 inches milled, not the nominal size.
What the Prices Are Doing
At the producer level, softwood lumber costs 15% more than a year ago, hardwood lumber 3.3% more, plywood 9.2% more (BLS Producer Price Index, July 2025 to July 2026, unadjusted 12-month change). Softwood lumber is up around 15 percent on the year at the mill, and shelf prices follow with a lag. A board-foot price from last season is a guess, not a quote. Full picture on the Cost Index.
| Item | Sampled price |
|---|---|
| 2x4x8 #2 Premium KD-HT Stud | $4.15 / each |
| 2x4x8 Premium Cut Framing Stud | $4.65 / each |
Every calculator above ships with externally validated test values and sourced assumptions. See the methodology page for the full ledger.