1. What is a Stair Calculator with Landing?

Definition: This calculator estimates the total horizontal length required for a staircase including the landing area.

Purpose: It helps architects, builders, and DIYers determine the space needed for constructing a safe and comfortable staircase.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L_t \) — Total length (m)
• \( R \) — Run per step (m)
• \( N \) — Number of steps (dimensionless)
• \( L_l \) — Landing length (m)

Explanation: The run per step multiplied by number of steps gives the total run of the stairs, then the landing length is added to get the complete horizontal space requirement.

3. Importance of Stair Calculation

Details: Proper stair calculation ensures comfortable step proportions, adequate landing space, and compliance with building codes.

4. Using the Calculator

Tips: Enter the run per step (typically 0.25-0.3m), number of steps, and landing length (minimum 0.9m for residential). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical run per step?
A: Most building codes recommend 0.25-0.3m per step for comfortable climbing.

Q2: How do I determine number of steps?
A: Divide total vertical rise by desired riser height (typically 0.15-0.2m).

Q3: Is landing length always required?
A: Landings are required when stairs change direction or exceed certain heights (usually every 3.6m vertical).

Q4: What's the minimum landing length?
A: Typically 0.9m for residential, 1.2m for commercial buildings.

Q5: Does this include handrail extensions?
A: No, add extra length if handrails extend beyond the top/bottom steps.