Calculate Board Feet,
Buy Lumber Like a Pro.
Free lumber calculators: board feet by dimension, stud counts for walls, plywood sheet coverage, and material cost estimates.
True Board Foot Formula
(Thickness in inches × Width in inches × Length in feet) ÷ 12: universal hardwood pricing.
Nominal vs Actual Dimensions
Remember that a 2x4 is 1.5" × 3.5" and a 1x6 is 0.75" × 5.5" when detailing woodworking joints.
Framing Wall Stud Count
Wall length in feet × 0.75 + corner/partition studs + top/bottom plates with 10% waste.
LumberMath Calculators
Board Foot Calculator
Board feet from thickness, width, length, and quantity — the volume unit hardwood is sold in, computed correctly.
Stud & Framing Calculator
Studs for a wall — corners, openings, plates, and the 16"-OC math with every extra the real wall needs.
Plywood & Sheet Goods Calculator
4×8 sheets for floors, walls, and roofs — with layout orientation, waste, and thickness guidance.
Lumber Cost Calculator
Project lumber cost by dimension and quantity — with the waste factor and delivery fee that complete the yard bill.
Building Code & Methodology
The nominal lumber chart you will actually remember
Every common 2x and 1x dimension, nominal vs actual, and why the lie exists.
How to pick straight lumber in eight seconds per board
The sight-down-the-edge check, crown direction, and why the yard lets you pick.
12 mistakes people make with lumber and framing
The recurring errors we see in lumber and framing — what causes each one, and the habit that prevents it.