Disclaimer

This website provides planning estimates and mathematical calculations for informational purposes. Actual material requirements can vary based on layout, product specifications, installation methods, site conditions, and applicable building codes. Structural dimensions and construction requirements should be verified using applicable codes, manufacturer instructions, approved plans, or a qualified professional before construction.

Specifically, these calculators estimate geometry, material quantity, and cost — they do not calculate or imply allowable joist spans, beam spans, footing sizes, structural load capacity, or code-approved railing or stair dimensions. Those figures depend on lumber species, grade, member size, spacing, and local code requirements that must be verified separately.

No result on this site should be treated as approval for construction. Always confirm final dimensions and structural requirements against your local building code, the manufacturer's instructions, an approved plan, or a qualified professional before building.