Construction

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Board Foot Calculator.

Calculate lumber volume in board feet from explicit dimensions and count.

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Set your values

Results update as you type.

02 / ANSWER

Length

Width

Thickness

Count

Result

0.0000

Results use only the stated formula and entered units; they are not building-code, equipment-sizing, or structural design advice.

Use Cases

Estimating lumber for a project

Determine total board feet needed for framing, furniture, or other woodworking projects to plan purchases and costs.

Example: 10 boards of 8 ft × 6 in × 1 in = 40 board feet

Pricing lumber from a supplier

Convert your measurements to board feet to compare prices per board foot from different suppliers.

Example: Calculate board feet for a quote of 25 boards at 12 ft × 8 in × 2 in

Frequently Asked Questions

What is a board foot?: A board foot is a unit of lumber volume equal to 1 foot long × 1 foot wide × 1 inch thick (144 cubic inches). It's commonly used in the lumber industry to measure and price wood.
How do I calculate board feet?: Multiply length (ft) by width (in) by thickness (in), then divide by 12. For multiple boards, multiply by the count. This calculator does that automatically.
Can I use this for any lumber size?: Yes, as long as you input the length in feet, width and thickness in inches, and the number of boards. It works for any dimensions within those units.

Tips & Common Mistakes

Tips

Measure length in feet, width and thickness in inches for accurate results.
For multiple boards, enter the total count to get the combined board feet.
Use nominal dimensions if you're comparing with standard lumber sizes, but actual dimensions for precise volume.

Common Mistakes to Avoid

Forgetting to convert width or thickness to inches if measured in other units.
Entering the total length of all boards instead of the length of one board and the count separately.
Confusing board feet with cubic feet; board feet uses a 1-inch thickness base.

Last updated: August 13, 2026

Use Cases

Estimating lumber for a project

Determine total board feet needed for framing, furniture, or other woodworking projects to plan purchases and costs.

Example: 10 boards of 8 ft × 6 in × 1 in = 40 board feet

Pricing lumber from a supplier

Convert your measurements to board feet to compare prices per board foot from different suppliers.

Example: Calculate board feet for a quote of 25 boards at 12 ft × 8 in × 2 in

Frequently Asked Questions

What is a board foot?

A board foot is a unit of lumber volume equal to 1 foot long × 1 foot wide × 1 inch thick (144 cubic inches). It's commonly used in the lumber industry to measure and price wood.

How do I calculate board feet?

Multiply length (ft) by width (in) by thickness (in), then divide by 12. For multiple boards, multiply by the count. This calculator does that automatically.

Can I use this for any lumber size?

Yes, as long as you input the length in feet, width and thickness in inches, and the number of boards. It works for any dimensions within those units.

Tips & Common Mistakes

Tips

Measure length in feet, width and thickness in inches for accurate results.
For multiple boards, enter the total count to get the combined board feet.
Use nominal dimensions if you're comparing with standard lumber sizes, but actual dimensions for precise volume.

Common Mistakes to Avoid

Forgetting to convert width or thickness to inches if measured in other units.
Entering the total length of all boards instead of the length of one board and the count separately.
Confusing board feet with cubic feet; board feet uses a 1-inch thickness base.

Use Cases

Estimating lumber for a project

Determine total board feet needed for framing, furniture, or other woodworking projects to plan purchases and costs.

Example: 10 boards of 8 ft × 6 in × 1 in = 40 board feet

Pricing lumber from a supplier

Convert your measurements to board feet to compare prices per board foot from different suppliers.

Example: Calculate board feet for a quote of 25 boards at 12 ft × 8 in × 2 in

Frequently Asked Questions

What is a board foot?

A board foot is a unit of lumber volume equal to 1 foot long × 1 foot wide × 1 inch thick (144 cubic inches). It's commonly used in the lumber industry to measure and price wood.

How do I calculate board feet?

Multiply length (ft) by width (in) by thickness (in), then divide by 12. For multiple boards, multiply by the count. This calculator does that automatically.

Can I use this for any lumber size?

Yes, as long as you input the length in feet, width and thickness in inches, and the number of boards. It works for any dimensions within those units.

Tips & Common Mistakes

Tips

Measure length in feet, width and thickness in inches for accurate results.
For multiple boards, enter the total count to get the combined board feet.
Use nominal dimensions if you're comparing with standard lumber sizes, but actual dimensions for precise volume.

Common Mistakes to Avoid

Forgetting to convert width or thickness to inches if measured in other units.
Entering the total length of all boards instead of the length of one board and the count separately.
Confusing board feet with cubic feet; board feet uses a 1-inch thickness base.