mycalculators.app

Stair Calculator

Calculate stair dimensions, rise, run, and building code compliance

SC

Stair Calculator

Calculate stair dimensions, rise, run, and building code compliance

Vertical distance between floors

Available horizontal space

Number of Steps

13 risers

12 treads

Actual Rise

7.385 inches

Code compliant

Actual Run

10.000 inches

Code compliant

Stair Angle

36.4°

Good angle

Not Code Compliant

✓ Rise: 7.385 inches
✓ Run: 10.000 inches
✓ Angle: 36.4°

Construction Details

Stringer Length:153.67 inches
Total Horizontal Run:120.00 inches
Walking Line Length:158.99 inches
Comfort Factor (2R+T):24.77 inches
Critical Headroom:65.2 inches
Stringer Board Feet:24.0 bd ft
Advanced Settings

Material thickness

Tread overhang

Minimum clearance

2x12 = 11.25"

Quick Reference

Code Requirements

IRC: Rise 4\"-7¾\", Run ≥10\"
IBC: Rise 4\"-7\", Run ≥11\"
Headroom: ≥6'8\" (80\")
Width: ≥36\" (IRC), ≥44\" (IBC)

Design Guidelines

Ideal angle: 30-35°
Comfort rule: 2R+T = 24-25\"
Nosing: ¾\"-1¼\"
Handrail: 34\"-38\" high

Related Calculators

AC
Age Calculator
More than just years - calculate your exact age down to the ...
Work Hours Calculator
Simplify payroll with automatic overtime calculations. Track...
Cement Calculator
Calculate concrete volume, materials, and costs for your con...
Date Calculator
Calculate differences between dates and add/subtract days fr...
TC
Time Calculator
Add, subtract, and calculate time durations in hours, minute...
HC
Hours Calculator
Calculate hours worked, time differences, and hourly calcula...

How to Use

  1. 1Enter your values in the input fields
  2. 2Review the calculated results
  3. 3Use the results for your planning

📚 Table of Contents

📖 6 min readUpdated: 7/25/2025

1Complete Guide to Stair

Calculate stair dimensions, rise, run, and building code compliance. This comprehensive guide will help you understand all aspects of stair and how to use it effectively for your specific needs. Whether you're using this for personal, professional, or educational purposes, you'll find valuable insights and practical tips.

Getting Started

Understanding the basics ensures accurate results: • Input requirements and formats • Common use cases and scenarios • Interpreting output values • Troubleshooting common issues • Best practices for accuracy

Advanced Features

Maximize the calculator's potential: • Multiple calculation modes • Customization options • Saving and comparing results • Integration with other tools • Professional applications

2Tips and Best Practices

Get the most value from your calculations with these expert tips and strategies.

Accuracy and Precision

Ensure reliable results: 1. Double-check input values 2. Use appropriate units 3. Consider significant figures 4. Account for real-world variables 5. Verify with alternative methods when possible

Common Applications

This calculator helps with: • Planning and estimation • Comparison and analysis • Decision making • Problem solving • Educational purposes • Professional requirements

🔗 Related Resources

🧮

Compare with Similar Tools

Explore related calculators in the Other category

📄

Calculator Selection Guide

Choose the right tool for your needs

This comprehensive guide is regularly updated to ensure accuracy. Last reviewed: 7/25/2025

Frequently Asked Questions

What are standard stair dimensions?

Standard residential stairs typically have a rise (height) of 7-7.75 inches and a run (depth) of 10-11 inches. The 7-11 rule (7-inch rise, 11-inch run) is a common standard.

What is the stair formula?

The stair formula is: 2 × Rise + Run = 24-25 inches. This ensures comfortable and safe stairs. Also, Rise × Run should equal approximately 70-75.