How many board feet is a 2x4x8?

Using actual dressed size 1.5″ × 3.5″ × 8′ → (1.5 × 3.5 × 8) ÷ 12 = 3.5 BF. Using nominal 2″ × 4″ × 8′ → (2 × 4 × 8) ÷ 12 = 5.333 BF.

How to calculate BDFt?

A meter is slightly longer — roughly 9.36% longer than a yard. (1 m ≈ 1.0936 yd)

How much is 1000 board feet of lumber?

1,000 BF is an MBF. Cost = price per BF × 1000 (varies by species, grade, and market)

How to calculate BDFt in a log?

Logs are typically scaled by rules (Doyle, Scribner, International 1/4) using small-end diameter inside bark and length. Choose the rule common in your region or buyer’s request for consistent results.

Framing Calculator

Board Foot Wall Calculator

Calculate lumber requirements for wall framing including studs, plates, headers, and blocking. Get accurate material lists for your construction project.

Wall Dimensions

Enter wall specifications for framing material estimate

Wall Length (feet)

Wall Height (feet)

Stud Spacing (inches OC)

Stud Size

Number of Doors

Number of Windows

Include blocking/fire stops

Note: Calculation includes top and bottom plates (doubled bottom plate for load-bearing walls). Add 10-15% waste factor when ordering.

Stud Spacing

16" OC is standard for most walls. Use 12" OC for heavy loads or high winds. 24" OC acceptable for non-load-bearing interior walls with proper sheathing.

Headers

Door/window openings require headers. Size depends on span and load. Typical: 2×6 for 3' span, 2×8 for 4-5', 2×10 for 6-7', 2×12 for 8-10'.

Plates

Top plate: single or double. Bottom plate: single for non-load-bearing, double for load-bearing. Use pressure-treated for bottom plate on concrete.

Frequently Asked Questions

How many studs do I need for a wall?

Divide wall length (in inches) by stud spacing, add 1. Example: 20' wall ÷ 16" OC = 240" ÷ 16 = 15 + 1 = 16 studs. Add extras for corners, intersections, and openings.

What size lumber for wall framing?

2×4 for most interior non-load-bearing walls. 2×6 for exterior walls (better insulation space) and load-bearing walls. Use appropriate header sizes for openings.

Do I need blocking in walls?

Required for fire stops in walls over 10' tall, backing for cabinets/fixtures, and mid-span bracing. Check local building codes for specific requirements.