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
Totalrise
2

Step Run

Horizontal tread depth for each stair
Steprun
3

Tread Type

Single board or two smaller boards for stair tread
Select:
Twoboards54x6 Twoboards2x6 Oneboard2x12
4

Stringer Attachment

Outside frame or flush frame
Select:
Outsideframe Flushframe

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.

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