What is a board foot?

1 board foot = 1 foot × 1 foot × 1 inch of lumber (144 cubic inches). It's the standard volume measure for lumber pricing, especially hardwoods.

How does the calculator compute board feet?

It uses a board-feet-per-linear-foot conversion factor based on lumber size, then multiplies by length and waste. For example, 2×10 is 1.667 bf per linear foot.

Why is board feet used for lumber?

Board feet is the standard unit for hardwood and premium lumber pricing. Softwood is more commonly sold by linear foot or piece, but bf still applies for volume calculations.

Nominal vs actual dimensions — which does the calculator use?

Board foot uses nominal dimensions (a 2×4 is calculated as 2"×4" even though actual is 1.5"×3.5"). This matches how lumber is priced and ordered.

How many board feet in a 2x4x8?

5.33 bf. Formula: (2 × 4 × 8 ft × 12 in) / 144 = 64 / 12 = 5.33 bf. The calculator uses pre-computed bf-per-linear-foot factors: 2×4 = 0.667 bf/lf × 8 ft = 5.33 bf.

How is hardwood priced compared to softwood?

Hardwood is almost always priced per board foot ($3–$15+/bf depending on species and grade). Softwood is usually priced per linear foot or per piece in retail, though wholesale and structural lumber prices often appear in bf for bulk orders.

Board Feet Calculator

Convert linear footage of lumber into board feet for accurate ordering.

Board Feet Calculator

Distance (ft)

Lumber size

Waste(%)

Results

Board feet

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These calculators are even more powerful inside The Blocks. During takeoffs, material quantities are calculated automatically from your measurements — no manual entry needed.

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CRM & contact management

MonthlyAnnualSave 20%

Seats:

$119 per seat × 1$119/mo

Total

$119/mo

$1,428/yr

How to Use This Calculator

Formula

Board feet per linear foot:  1×4=0.333  1×6=0.5  1×8=0.667  1×10=0.833  1×12=1.0  2×4=0.667  2×6=1.0  2×8=1.333  2×10=1.667  2×12=2.0  4×4=1.333  4×6=2.0totalBf = ⌈length × bfPerLf × (1 + waste/100) × 10⌉ / 10

Parameters

Lumber Size: Nominal dimensions with bf/lf conversion factor.
Waste %: Extra for defects, cuts, job-site losses.

Results

Board Feet: Total bf to order (1 bf = 1 ft × 1 ft × 1 in).

Example

Deck Joists

200 lf of 2×10, 10% waste

bfPerLf for 2×10 = 1.667totalBf = ⌈200 × 1.667 × 1.10 × 10⌉ / 10 = 366.7 bf

Common Use Cases

Deck framing and joists
Fence boards and posts
Custom millwork and trim
Structural beam calculations

Notes

Board foot is based on nominal dimensions, not actual.
Hardwood is sold by bf, softwood by linear foot or piece.
Quick conversions: 1 bf = 144 cubic inches = 0.00236 m³. A 2×4×8 ft board contains 5.33 board feet (8 ft × 0.667 bf/lf).
Hardwood grades affect price more than size: FAS (Firsts and Seconds) is premium; Select is mid-tier; #1 Common has small defects and prices ~30% lower.

Frequently Asked Questions

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Trim / Molding Calculator

Calculate linear trim pieces for baseboard, crown molding, and chair rail.

Linear

Get in Touch

Zaur Zhanabekov

Sales

+1 347-962-1064 zaur@theblocks.app

Need Construction Business Software?

These calculators are even more powerful inside The Blocks. During takeoffs, material quantities are calculated automatically from your measurements — no manual entry needed.

Web access — desktop, tablet & mobile

AI-powered plan takeoffs

Manual markup tools

Cost estimating & budgets

Bid management & proposals

CRM & contact management

MonthlyAnnualSave 20%

Seats:

$119 per seat × 1$119/mo

Total

$119/mo

$1,428/yr

How to Use This Calculator

Formula

Board feet per linear foot:  1×4=0.333  1×6=0.5  1×8=0.667  1×10=0.833  1×12=1.0  2×4=0.667  2×6=1.0  2×8=1.333  2×10=1.667  2×12=2.0  4×4=1.333  4×6=2.0totalBf = ⌈length × bfPerLf × (1 + waste/100) × 10⌉ / 10

Parameters

Lumber Size: Nominal dimensions with bf/lf conversion factor.
Waste %: Extra for defects, cuts, job-site losses.

Results

Board Feet: Total bf to order (1 bf = 1 ft × 1 ft × 1 in).

Example

Deck Joists

200 lf of 2×10, 10% waste

bfPerLf for 2×10 = 1.667totalBf = ⌈200 × 1.667 × 1.10 × 10⌉ / 10 = 366.7 bf

Common Use Cases

Deck framing and joists
Fence boards and posts
Custom millwork and trim
Structural beam calculations

Notes

Board foot is based on nominal dimensions, not actual.
Hardwood is sold by bf, softwood by linear foot or piece.
Quick conversions: 1 bf = 144 cubic inches = 0.00236 m³. A 2×4×8 ft board contains 5.33 board feet (8 ft × 0.667 bf/lf).
Hardwood grades affect price more than size: FAS (Firsts and Seconds) is premium; Select is mid-tier; #1 Common has small defects and prices ~30% lower.