Construction

Lumber Calculator

Total the linear feet, board feet and cost of framing lumber.

Number of pieces

Nominal thickness

Nominal width

Length

Price per linear foot ($)

Calculated Output

Total linear feet 80

Total board feet (BF) 53.333

Total cost ($) 0

Formula: board feet = thickness × width × length ÷ 12 (per piece)

Step-by-Step Breakdown

1. Values used:

2. Number of pieces = 10

3. Nominal thickness = 2

4. Nominal width = 4

5. Length = 8

6. Price per linear foot = 0 $

8. Total linear feet = Number of pieces x Nominal thickness x Nominal width = 10 x 2 x 4 = 80

9. Total board feet = 53.333BF

10. Total cost = 0$

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The math behind it

Linear feet = pieces × length.

Board feet per piece = thickness (in) × width (in) × length (ft) ÷ 12; multiply by pieces.

10 pieces of 2×4 at 8 ft → 80 linear ft; board feet = 10 × (2×4×8 ÷ 12) = 53.3 BF.

Nominal vs actual size?

A '2×4' actually measures ~1.5×3.5 in after planing. Use nominal sizes for board-foot ordering.