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. Before we look at the specific measurements we’ll need, it helps to understand more about the various parts of deck stairs.
Knowing the lingo behind the parts that make up a staircase can go a long way toward taking accurate measurements and simplifying the process.
The key components of a set of deck steps are:
Use the calculator to add your deck’s measurements for:
Using your deck measurement specifications, our stair calculator will tell you:
Pro Tip: A shorter rise may be more comfortable to climb with a deeper run. Similarly, a taller rise might work better with a shorter run. Check your local building codes for allowable rise and run.
Having a stable, sturdy set of stairs leading to and from your deck is one of the most important -- and complex -- parts of the deck building process. To calculate the stringer length, follow this formula:
Build your DIY carpentry knowledge and check our article on building deck stairs and steps. You’ll find tips and tricks to help make your deck building project run more smoothly.