How many board feet in 1x5x18?

The size of a 1x5x18 is 7.5 board feet.

Board Feet Calculator

Calculate Board Feet







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Formula

The formula to calculate board feet is:

\[ \text{board feet} = \frac{\text{length (ft)} \times \text{width (in)} \times \text{thickness (in)}}{12} \]

Definition

Board feet is a unit of measurement for lumber, representing the volume of a board that is 1 foot long, 1 foot wide, and 1 inch thick.

Example Calculation

Let's assume the following values:

Using the formula:

\[ \text{board feet} = \frac{8 \times 10 \times 1.25}{12} = 8.33 \text{ board feet} \]

Conversion Chart

Length (feet) Width (inches) Thickness (inches) Board Feet
6 8 1 0.33
7 8 1 0.39
8 8 1 0.44
9 8 1 0.50
10 8 1 0.56
11 8 1 0.61
12 8 1 0.67
13 8 1 0.72
14 8 1 0.78
15 8 1 0.83
16 8 1 0.89
17 8 1 0.94
18 8 1 1.00
19 8 1 1.06
20 8 1 1.11
21 8 1 1.17
22 8 1 1.22
23 8 1 1.28
24 8 1 1.33
25 8 1 1.39