🏗️ Stair Calculator

Calculate perfect stair dimensions for your construction project. Get rise, run, number of steps, and ensure building code compliance.

📐 Enter Measurements

Total Height (inches)

Vertical distance from floor to floor

Total Run (inches) - Optional

Horizontal distance (leave blank for automatic calculation)

Preferred Riser Height (inches)

Recommended: 6-8 inches (7.5 is ideal)

Preferred Tread Depth (inches)

Recommended: 9-12 inches (10-11 is ideal)

About the Stair Calculator

🎯 What This Tool Does

Our stair calculator helps you determine the optimal dimensions for any staircase project. Whether you're building new stairs or renovating existing ones, this tool ensures your stairs are safe, comfortable, and compliant with building codes.

🔧 Key Features

• Calculate number of steps needed
• Determine optimal rise and run
• Check building code compliance
• Adjust for preferred measurements
• Mobile-friendly interface

📏 How to Use

1. Measure Total Height: Measure the vertical distance from the lower floor to the upper floor.
2. Enter Preferences: Input your preferred riser height (6-8 inches) and tread depth (9-12 inches).
3. Optional Total Run: If you have space constraints, enter the maximum horizontal distance available.
4. Calculate: Click the calculate button to get your results.
5. Review Results: Check the calculated dimensions and code compliance.

📋 Building Code Guidelines

Riser Height

Maximum: 7¾ inches
Minimum: 4 inches
Variation: ⅜ inch max

Tread Depth

Minimum: 10 inches
Recommended: 11 inches
Variation: ⅜ inch max

Headroom

Minimum: 6'8" (80 inches)
Measured vertically
From tread nosing