Siding Calculator - Free Online Tool

Our Siding Calculator provides instant, accurate material estimates so you can purchase exactly what you need. Simply input the dimensions of your project: the total linear footage and the height of the walls requiring siding coverage. The tool then factors in standard industry measurements, such as board width and typical overlap requirements (e.g., 6 inches for clapboard).

It automatically calculates the required number of boards per section and aggregates this to give you a total square footage estimate. We recommend using the 'Waste Factor' slider, which adjusts the calculation based on roof pitches or complex angles, ensuring your final count is realistic for ordering lumber.

• Input Length: Enter the total perimeter of the wall sections.
• Input Height: Specify the vertical height to be covered (e.g., 8 ft).
• Review Estimate: The resulting figure gives you board count and total linear feet needed for procurement.

Beyond the calculation, proper preparation is key to a perfect siding job. Before finalizing your number of boards, ensure you have measured all walls at eye level, as some lumber suppliers may cut materials differently than expected.

When planning for complex structures, such as curved sections or multiple levels, consider grouping those areas and calculating the total footage together. This approach helps maintain consistency in the required board width. Always confirm that your chosen siding material (e.g., cedar shake vs. fiber cement) is compatible with local climate conditions before proceeding with lumber orders.

• Measure Twice, Calculate Once: Use a laser measure or reliable tape measure for all dimensions.
• Check Material Compatibility: Verify the chosen wood species handles local moisture and pests effectively.
• Review Local Codes: Confirm required spacing between boards or specific flashing requirements dictated by your municipality before buying lumber.