What is Lumber?
Lumber refers to wood that has been processed into beams, planks, and other shapes suitable for construction and carpentry. It starts as raw timber, which is then cut, dried, and (often) treated for durability. Lumber is used in building everything from homes and furniture to decks and fences. It's a versatile material that comes in various sizes and types, each suited for specific applications.
What Type of Lumber Do I Need?
Our lumber calculator is a great but very general tool. When choosing lumber, consider the following factors:
- Purpose — Calculate lumber with its purpose in your mind. Different projects require different types of wood.
- Strength — Hardwoods like oak are stronger than softwoods like pine.
- Durability — Treated lumber resists weather and insects better.
- Appearance — Choose wood with the right color and grain for your project.
- Cost — Prices vary widely between wood types.
- Availability — Ensure the wood type is available in your area.
How to Use This Lumber Calculator
Our lumber calculator helps you calculate the volume and total length of your lumber, making your project planning easy and precise. Follow these steps:
- Select your measurement system — Imperial (feet and inches) or Metric (meters and centimeters).
- Enter the length of one piece of lumber.
- Enter the width of one piece of lumber.
- Enter the thickness of one piece of lumber.
- Specify the number of pieces.
The calculator will show:
- Volume per piece — The volume of a single piece of lumber.
- Total volume — The combined volume for all pieces.
- Total length — The combined length of all pieces.
Additionally, open the Price (optional) section, enter the price for one piece of lumber and select your currency, and the calculator will display the total cost for the entire quantity. This feature is particularly useful for budgeting your projects and ensuring you have accurate cost estimates.
Measurement Systems
The calculator supports both major measurement systems used in construction:
- Imperial (ft / in) — Enter length in feet, width and thickness in inches. Volume is shown in cubic feet (cu ft). Commonly used in the United States and Canada.
- Metric (m / cm) — Enter length in meters, width and thickness in centimeters. Volume is shown in cubic meters (m³). Standard in most of the world.
Supported Currencies
For cost estimation, the calculator supports 20 world currencies including US Dollar (USD) and Russian Ruble (RUB): USD, RUB, EUR, GBP, CAD, AUD, JPY, CNY, INR, BRL, MXN, CHF, SEK, NOK, DKK, PLN, TRY, ZAR, NZD, SGD.
Frequently Asked Questions
- Can you burn pressure-treated lumber?
- No — burning pressure-treated lumber releases toxic chemicals (arsenic compounds in older lumber, copper compounds in modern ACQ-treated lumber) that are harmful to breathe. Always dispose of treated lumber according to local regulations.
- What is the difference between nominal and actual lumber dimensions?
- Lumber is sold by nominal size (e.g., 2×4), but actual dimensions are smaller due to drying and planing. A nominal 2×4 measures approximately 1.5 × 3.5 inches actually. When calculating volume, use the actual measurements for accuracy.
- How do I calculate board feet?
- Board feet (BF) = (Length in feet × Width in inches × Thickness in inches) / 12. For example, a 2×4 board that is 8 feet long: (8 × 4 × 2) / 12 ≈ 5.33 board feet. If you need board feet specifically, check out our Board Foot Calculator.
- What common lumber sizes are available?
- The most common dimensional lumber sizes (nominal × actual in inches) are: 1×4 (0.75×3.5), 2×4 (1.5×3.5), 2×6 (1.5×5.5), 2×8 (1.5×7.25), 2×10 (1.5×9.25), 2×12 (1.5×11.25), and 4×4 (3.5×3.5).
- How much does lumber weigh?
- Lumber weight depends on the wood species and moisture content. Dry softwood (pine, spruce) weighs roughly 25–35 lb per cubic foot (400–560 kg/m³), while hardwoods can range from 30–60 lb per cubic foot (480–960 kg/m³).