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How Do I Calculate How Much Wood I Need for My Project?

List every finished part, convert each to board feet at the rough thickness you’ll buy, total them, then add about 15–30% extra for planing loss, defects, grain rejects, and miscuts — more for figured stock or a first big glue-up. Bring that cut list to Fells Hardwood Supply in Hutto and we’ll help you shop to the number.

A simple four-step method

  1. Write a cut list: quantity × finished thickness × width × length for each part.
  2. Pick the rough quarter you’ll buy (4/4, 6/4, 8/4, etc.) so finished size is reachable after milling.
  3. Convert each line to board feet: T × W × L (inches) ÷ 144 using that rough thickness.
  4. Multiply the total by 1.15–1.30 (waste buffer), then buy to that board-foot number.
Four steps: cut list, pick quarter, convert to board feet, add waste buffer 1. Cut list parts × sizes 2. Quarter 4/4, 6/4… 3. Board ft T×W×L÷144 4. +15–30% buy target Example: 10 BF parts + 25% waste → shop for ~12.5 BF The BF number is the ticket target — then nest parts onto real boards
Estimate in board feet at the rough thickness you will buy, then add the waste buffer before you shop.

Example: three parts that total 10 BF at 4/4, plus 25% waste → shop for about 12.5 BF. You’ll still nest parts onto real boards — the BF number is the ticket target, not a guarantee every offcut disappears.

Why can’t I buy exactly the cut-list total?

Flattening removes thickness. Rips and crosscuts leave offcuts. A board that looked perfect face-on can hide a knot or color shift you won’t want in a show face. The percentage is a shopping buffer, not a law of nature — but buying to the bare cut list is how people run short mid-project.

Waste buffer covers planing loss, defects, and offcuts parts you need (~70–85%) buffer planing · defects · grain rejects · miscuts +15–30% (or more)
Buying to the bare cut-list total is how projects run short mid-build.

When should I buy more than 30% extra?

Highly figured maple, crotch, heavy character grades, complex curves, or projects that demand matched color across many boards often need more. Same if you’re a beginner on a first large glue-up. Better to leave with a little extra than to hunt a matching board two weeks later.

How do I nest parts on real boards?

After you have a BF target, think in lengths and widths available in the store — not only cubic inches. Two 36" rails may fit one 8' board with waste, or need more stock if you also need clear grain. That’s why we like cut lists in hand at the store: we can help you pull boards that actually fit the parts, not just the math.

Two rails nested on one long board with leftover waste One long board · nest the parts rail 36" rail 36" offcut Board-foot math sets the budget; nesting decides which boards to pull.
Bring the cut list to the store so we can match lengths and clear faces, not only cubic inches.

Related: How hardwood is sold (BF + 4/4) · How board feet work · S4S vs S2S · All FAQs

Fells Hardwood Supply — Hutto, TX — serving Austin, Round Rock, Cedar Park, Georgetown, and the greater Austin metro.