How Much Lumber Do I Need for a Project?
Start with the parts, not the shopping list. Write down each piece, its finished dimensions and the number of copies. Then group similar parts so you can choose stock sizes that make sense.
Step 1: Build a cut list
For each component, record length, width, thickness and quantity. If a board will be ripped or resawn, note that too. Finished dimensions are more useful than nominal store labels when planning a project.
Step 2: Choose stock sizes
Pick standard stock that can produce your finished parts while leaving room for trimming. For sheet goods, think in terms of panel area and cut layout rather than simply adding finished part areas together.
Step 3: Account for waste
Some waste is unavoidable from saw kerfs, trimming, defects, grain direction and inefficient layouts. A simple percentage can be useful for a first estimate, but a real cut plan will usually be more accurate.
Step 4: Price the material
Once you know how many pieces or boards you need, multiply quantity by the supplier's price. Then add a waste allowance if your quantity estimate does not already include it.
Use MakeGauge
The Lumber Cost Calculator is designed for fast project estimates. Pair it with the Board Feet Calculator when your supplier prices hardwood by board foot.