How many board feet in 100 square feet of 2-inch lumber?

100 sq ft × 2 in = 200 board feet.

Area-to-Volume Conversion

Square Feet to Board Feet Calculator

Q: How do you convert square feet to board feet?

Board Feet = Square Feet × Thickness (in inches). For example, 200 sq ft of 1-inch lumber = 200 board feet.

Q: Why does thickness matter for board feet?

Board feet measure volume, not area. Thickness adds the third dimension needed to calculate actual lumber volume.

Q: Is square footage the same as board footage?

No. Square feet measure area (length × width). Board feet measure volume (length × width × thickness). They only equal each other when thickness is exactly 1 inch.

Convert square footage to board feet by adding thickness. Essential for flooring, paneling, and woodworking projects.

Free Square Feet to Board Feet Converter

Enter area and thickness — board feet update instantly.

Length (ft) Width (ft)

— OR —

Total Area (sq ft) Thickness (inches) Board feet

How Thickness Converts Area to Volume

Square feet measure only the surface area. Adding thickness gives you the third dimension, turning an area measurement into board feet (volume).

Interactive Area-to-Volume Diagram

The bars update as you enter values above.

Square Feet (area)

0.00 SF

Thickness (inches)

0.00 in

Board Feet (volume)

0.00 BF

Step-by-Step Conversion

Measure Area

Calculate the square footage of your project — length × width in feet.

Measure Thickness

Use the actual board thickness in inches (not nominal).

Multiply

Square Feet × Thickness = Board Feet. Done!

Conversion Reference Table

Square Feet	1" Thick	1.5" Thick	2" Thick
50	50 BF	75 BF	100 BF
100	100 BF	150 BF	200 BF
200	200 BF	300 BF	400 BF
500	500 BF	750 BF	1,000 BF

💡 For flooring projects, use ¾ in (0.75) as the thickness for standard tongue-and-groove boards.

Frequently Asked Questions

How do you convert square feet to board feet?

Board Feet = Square Feet × Thickness (inches). For example, 200 sq ft of 1-inch lumber = 200 board feet.

Why does thickness matter for board feet?

Board feet measure volume. Square feet only measure area. Without thickness, you can't calculate how much actual wood you need.

How many board feet in 100 sq ft of 2-inch lumber?

100 × 2 = 200 board feet.

Is square footage the same as board footage?

Only when thickness is exactly 1 inch. At any other thickness, they differ. Board feet always account for the third dimension.

What thickness should I use for flooring?

Standard hardwood flooring is ¾ in (0.75 in). Enter 0.75 as thickness for accurate results.

Can I convert board feet back to square feet?

Yes — Square Feet = Board Feet ÷ Thickness (in). For example, 300 BF at 1.5" thick = 200 sq ft.

Convert Your Area to Board Feet

Fast, free square feet to board feet conversion for any thickness.

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