Deck Stairs Calculator

Building stairs for your deck is often considered “the most difficult part of” the construction project. Having the right calculations before getting started can make the task a lot easier.

To simplify the process, we’ve created this deck stair calculator to help you determine the correct measurements needed to carry out your project.

This calculator will tell you:

  • How many rises you'll need
  • Dimensions for each rise
  • Total run and rise
  • Step run (tread depth)
  • Step rise (riser height)
  • Bottom step rise
  • Angle of your staircase
  • Stringer length
  • How many rises you'll need
  • Dimensions for each rise
  • Total run and rise
  • Step run (tread depth)
  • Step rise (riser height)
  • Bottom step rise
  • Angle of your staircase
  • Stringer length
1

Total Rise

Height of your deck to the ground
ft
Total Rise
2

Step Run

Horizontal tread depth for each stair
Step Run
3

Tread Type

Single board or two smaller boards for stair tread
Select:
2 - 5/4x6 2 - 2x6 1 - 2x12
4

Stringer Attachment

Outside frame or flush frame
Select:
Outside Frame Flush Frame

Building stairs for your deck is often considered “the most difficult part of” the construction project. Having the right calculations before getting started can make the task a lot easier.

To simplify the process, we’ve created this deck stair calculator to help you determine the correct measurements needed to carry out your project.