๐งฑ Construction
Staircase Calculator
Stair design is governed by the relationship between riser and tread: the combined total should land near 17 to 18 inches, which is why taller risers need shallower treads. Building codes also cap the riser at 7.75 inches.
How it works
Total rise (floor to floor)
Desired riser height
Tread depth
Stair width
Number of risers
Number of treads
Actual riser height
Total run
Total run
Code check
Frequently asked questions
How do I use the Staircase Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.