Door Header Size Calculator

Calculate Door Header Size

Door Width (ft)

Wall Height (ft)

Header Material

Load Type

Wall Thickness (in)

Safety Factor

About Door Header Calculations

Door header calculations determine the proper size and material for structural support above door openings.

Header Functions:

Support wall loads above opening
Distribute weight to supporting walls
Prevent wall deflection
Maintain structural integrity

Common Sizes:

2×6: Small openings
2×8: Medium openings
2×10: Large openings
2×12: Very large openings