Straight stair calculator

What you enter

• Total rise (in)
• Maximum riser (in)
• Tread run (in)

Main results

• Number of risers
• Actual riser height
• Number of treads
• Total run
• Stringer length

What it follows

Plain geometry on the rise, riser and tread you type; no building-code table is looked up. The maximum riser is a number you type; check the limit that applies where you build.

Every result is marked REVIEW REQUIRED. Illustrative project-planning values only; jurisdiction, species, grade, loads, wet service and current adopted tables require review. Do not use a result directly for permit, purchase, or field use.

Related calculators

• L stair
• U stair
• Spiral stair
• Baluster spacing

The calculator opens inside the designer, after you sign in.

Accounts are issued by the DeckAndShed team. There is no self-service sign-up.