1. What is a Stair Slope Calculator?

Definition: This calculator determines the slope of stairs based on the riser height and run length.

Purpose: It helps builders, architects, and DIYers ensure stairs meet safety standards and building codes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope (dimensionless ratio)
• \( h \) — Riser height (meters)
• \( L \) — Run length (meters)

Explanation: The slope is calculated by dividing the vertical rise by the horizontal run.

3. Importance of Stair Slope Calculation

Details: Proper slope ensures comfortable and safe stair climbing, meets building codes, and prevents accidents.

4. Using the Calculator

Tips: Enter the riser height and run length in meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical stair slope?
A: Most building codes recommend a slope between 0.55 to 0.72 (riser/run ratio).

Q2: How does slope affect stair safety?
A: Steeper slopes are harder to climb and more dangerous, while shallower slopes require more space.

Q3: What are standard riser and run dimensions?
A: Typical riser: 0.15-0.20m, run: 0.25-0.30m, but check local building codes.

Q4: Can I use feet instead of meters?
A: Yes, as long as both measurements use the same units, the slope ratio will be correct.

Q5: How does slope relate to stair angle?
A: The angle (in degrees) can be calculated as arctan(S), where S is the slope.