Staircase Calculator
Design code-compliant staircases with optimal riser and tread dimensions. Calculates number of steps, angle, run length, handrail requirements, and includes visual diagrams with compliance checking.
Code Requirements:
- Riser: 102-196mm
- Tread: Min 254mm
- Max Angle: 37°
Calculate handrail length
Code Compliant
All dimensions meet IBC Residential requirements.
Risers
20
Treads
19
Angle
26.3°
Notes:
- Ideal 2R+T formula range: 600-640mm for comfortable stride
- G+R (Going+Rise) should be 430-450mm
- Concrete volume includes 150mm waist slab thickness
- Handrail length includes 300mm extensions at top and bottom
IMPORTANT DISCLAIMER
This calculator provides PRELIMINARY ESTIMATES ONLY and is intended for planning and budgeting purposes. Results should NOT be used for final structural design or construction without verification by a licensed Professional Engineer (PE) or Chartered Engineer (CEng).
By using this tool, you acknowledge that:
1. All calculations are indicative and may not account for site-specific conditions, load combinations, or local code requirements.
About This Calculator
The Staircase Calculator helps architects and structural engineers design code-compliant staircases for buildings across the UAE and Gulf. Calculate optimal riser heights, tread depths, stair angles, and total number of steps based on floor-to-floor heights. Includes compliance checking against international building codes and UAE Civil Defense requirements for egress stairs.
When to Use This Calculator
- Designing new staircases for residential and commercial buildings
- Verifying existing stair designs meet building codes
- Calculating concrete and rebar quantities for staircase construction
- Planning egress stairs for fire safety compliance
- Determining landing requirements for multi-flight stairs
How to Use This Calculator
Enter Floor Heights
Input the floor-to-floor height in millimeters for the staircase.
Select Stair Type
Choose stair configuration: straight run, L-shaped, U-shaped, or spiral.
Specify Code Requirements
Select building code (UAE Civil Defense, IBC, BS) for compliance checking.
Set Width & Constraints
Enter stair width and any space constraints for the stairwell.
Review Design
Get riser/tread dimensions, number of steps, angle, and compliance status with visual diagram.
Typical Scenarios in UAE & Gulf Projects
A villa needs internal stairs for a 3.2 m floor-to-floor height, checked against the calculator's UAE Civil Defense limits (riser 150-180 mm, going at least 280 mm, angle up to 35°). The calculator gives 19 risers of 168.4 mm and 18 goings of 283.2 mm (2R + G = 620 mm), a total going of 5.10 m and a pitch of 32.1°. Landings are not included: add them to the plan length if the flight is split.
An escape stair for a 4.0 m floor-to-floor height, 1,200 mm wide, U-shaped, checked against the same limits. The calculator gives 24 risers of 166.7 mm and 23 goings of 286.7 mm (2R + G = 620 mm), a total going of 6.59 m and a pitch of 31.2°, split into two flights around a half landing. Width, landings, handrails and headroom must be checked against the current UAE Fire and Life Safety Code.
Frequently Asked Questions
Take Your Calculations Further
This calculator reflects the logic built into Arkan's construction management platform.
Last Updated: January 2026
Standards Reference: Stair design per UAE Civil Defense, IBC 2021, and BS 5395