How to Use This Calculator

This tool determines the required stud size and spacing for a load-bearing wall based on the International Residential Code (IRC) 2021. Follow these steps:

1. Wall Height: Enter the height of the wall in feet.
2. Supported Load: Enter the total load (e.g., from the floor above) in pounds per linear foot (plf).
3. Stud Spacing: Select the stud spacing in inches (e.g., 16″ on center).
4. Wood Species: Choose the wood species and grade (e.g., Douglas Fir-Larch No. 2).
5. Click “Calculate” to see the required stud size and whether the wall meets IRC requirements.

Note: This calculator assumes a single-story wall with typical residential loading conditions.

Blocking Recommendation: For walls taller than 8 ft, consider adding mid-height blocking for additional stability.