Run Stair Layout
Precision Layout

Stair Stringer Calculator

Calculate exact stringer cut points, total run, and incline angle for code-compliant stair layouts. Built-in verification against standard rise and tread rules.

Building Code Verification

Mandatory Compliance Checks

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Maximum Rise Variance

Minimum Tread Depth

Headroom Clearance

Verify that the height difference between consecutive risers does not exceed municipal code limits, typically 3/8 inch.

Ensure each tread meets the minimum depth requirement for safe foot placement, commonly 10 inches.

Confirm that overhead clearance from the tread nosing to the ceiling is adequate, usually a minimum of 80 inches.

Critical Reminder

Always Verify with Local Building Codes

Before cutting any lumber stringers, confirm all calculations and dimensions against your specific municipal building codes and local requirements. This tool provides estimates; final compliance is your responsibility.

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