How to Choose Lumber for Woodworking Projects

The white oak cabinet story that started many professional plan libraries comes down to lumber: a plan used nominal 3/4″ thickness while store-bought boards measure 13/16″ or 19/32″ actual. Three students cut wrong panels — not because they could not measure, but because the plan was wrong. Your job at the lumber yard is to match real dimensions to real plans.

Nominal vs Actual — The Chart You Need

A "1×4" is not 1 inch by 4 inches. Nominal names are historical; actual dimensions are what hit your saw.

• 1×2 actual ≈ 3/4″ × 1-1/2″
• 1×3 actual ≈ 3/4″ × 2-1/2″
• 1×4 actual ≈ 3/4″ × 3-1/2″
• 1×6 actual ≈ 3/4″ × 5-1/2″
• 2×4 actual ≈ 1-1/2″ × 3-1/2″
• 2×6 actual ≈ 1-1/2″ × 5-1/2″
• 4×4 actual ≈ 3-1/2″ × 3-1/2″

Plywood labeled 3/4″ is often 23/32″ actual. Always measure your stock with a caliper or tape if the plan clearance is tight — drawer sides and dados are unforgiving.

Softwood vs Hardwood — When to Use Each

Softwoods (Pine, Fir, Cedar)

• Inexpensive, easy to cut and drill — ideal for first projects and painted furniture
• Dents easily — not great for fine dining tables without hard finish or cap rails
• Cedar and redwood resist rot — default choices for outdoor planters and benches
• Pressure-treated pine for ground contact — never use indoors or for cutting boards

Hardwoods (Oak, Maple, Poplar, Walnut)

• Poplar — affordable hardwood, paints beautifully, good step up from pine
• Red oak and white oak — strong, visible grain; pre-drill screw holes
• Hard maple — dense, great for cutting boards and heavy-use surfaces
• Walnut and cherry — premium appearance; save for showcase pieces after skill builds

Plywood and Sheet Goods

• Birch or maple plywood — stable, good for cabinets and shelves; void-free cores worth the premium
• Construction-grade CDX — structural only, not for visible furniture faces
• MDF — flat and cheap for painted panels; heavy, no grain strength, terrible dust
• Baltic birch — excellent for drawers and jigs; many thin plies resist warping
• Always support full sheets when cutting — sagging plywood binds the blade and ruins cuts

Picking Boards at the Store

Big-box stores and lumber yards both work for hobbyists. Big-box is convenient; lumber yards offer better hardwood selection and often straightening services.

• Sight down the length for bow (ends dip), twist (corners not flat), and cup (edges curl)
• Reject boards with large knots on structural edges or show faces unless rustic is the goal
• Match grain direction on visible faces for furniture — consecutive boards from one wider board look best
• Buy one extra board beyond the cut list on first builds — miscuts happen
• Let kiln-dried lumber acclimate to your shop 3–7 days when possible — especially in humid climates
• Stack lumber flat with stickers (spacers) between layers if storing more than a week

Reading the Plan's Materials List

• Translate every line to actual dimensions before shopping
• Note species — substituting pine for oak changes screw torque and finish absorption
• Check quantity units — "one sheet" of plywood vs "two boards" of 1×6×8′
• Flag special items early — edge banding, veneer, hardware that requires online ordering
• Bring the cut list to the store on your phone — reordering one board costs another hour