◧MeasureThenConstruction Calculators

Board Feet Calculator

Calculate board feet of lumber for any dimensions.

How It Works

Board feet = (Thickness in × Width in × Length ft ÷ 12) × Number of pieces.

Example

Five 2×4×10 boards: (2 × 4 × 10 ÷ 12) × 5 = 6.67 × 5 = 33.3 board feet.

Frequently Asked Questions

What is a board foot?

A board foot is 1 ft × 1 ft × 1 in of lumber — the standard unit for pricing rough and dimensional lumber.

Does this use nominal or actual size?

Lumber is priced using nominal (named) dimensions like 2×4, so this calculator uses nominal sizes.

Why divide by 12?

The formula multiplies inches by inches by feet; dividing by 12 converts to board feet.

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