What Is the Half-Turn Calculator?
Plan half-turn stairs (also known as dog-leg stairs) with two parallel flights and a 180-degree landing. This configuration is the most common in two-story residential construction and provides excellent fall protection through the mid-flight landing.
How to Use This Calculator
- Enter the total floor-to-floor rise.
- Configure tread depth, width, and landing size.
- Review the split between upper and lower flights.
Why Accurate Half-Turn Calculations Matter
Half-turn stairs are space-efficient because both flights stack above each other. The landing width determines the overall stair footprint, and the well opening between flights must be wide enough for handrails on both sides.
Building Code References
Related Tools
Frequently Asked Questions
What is a dog-leg staircase?+
A dog-leg stair is another name for a half-turn staircase where the outer stringer of the upper flight sits directly above the outer stringer of the lower flight, with no well opening between them.