Stair Stringer Calculator - Free Calculator
Calculate stair stringer dimensions with code compliance check. Get accurate estimates for your home improvement project.
Calculator Inputs
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How to Use This Calculator
Measure total rise (floor to floor height) and enter desired tread depth (10-11" typical). Calculator determines steps needed, individual rise, and checks IRC code compliance.
Why Accurate Stair Stringer Matters
Stair dimensions are strictly regulated by building codes for safety. Rise must be 4-7.75", run minimum 10". Consistent dimensions prevent tripping hazards. Code compliance prevents inspection failures.
Common Mistakes to Avoid
Inconsistent rise between steps, forgetting to account for finish flooring thickness, using wrong lumber size for stringers, and not securing properly at top and bottom.
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