Measure. Count. Send your list.
Stair calculator for rise and run
Check the rise and run in your stair plan. Enter the stringer count and blank length from your material schedule, then add those blanks to your list.
Call or text (718) 851-2100 for today's price. Text the yard · Request a quote
Your measurements
Use an approved plan. This straight-flight example treats the upper landing as the last step, so there is one fewer tread than risers. Every field is your choice.
Example only. Replace these numbers with your job measurements and plan.
Your material count
Ready when you are.
Enter your measurements and waste allowance, then tap Calculate.
Your result will show what was counted and what needs confirmation.
A count to discuss with the yard. Availability and specification are confirmed when we quote.
Keep the job together
My list
Your list is empty. Calculate, then add your result.
Items stay in this browser. Review your measurements and add material details before sending. The quote page is the next step; nothing has been sent yet.
How this stair calculator works
Riser height = total rise ÷ number of risers. Treads = risers − 1. Horizontal run = treads × tread run. Sloped distance = square root of (total rise² + horizontal run²). Divide inches by 12 for feet. Requested blanks = stringer count × (1 + waste ÷ 100), rounded up.
Check a worked example
An arithmetic example of 42 in total rise, 6 risers and a 10 in tread run gives 7 in per riser, 5 treads and 50 in of horizontal run. The sloped distance is about 5.442 ft. Entering 3 blanks at 8 ft with 0% waste requests 3 blanks. None of those example choices is a code rule.
Before you order
This stair stringer calculator gives geometry only. Sloped distance is not a cutting length or a minimum blank size. End cuts, tread thickness, landings, stock depth, fastening and structural suitability are not calculated. For the riser count, tread run, number of stringers and blank size, confirm with your engineer or architect.
Call or text (718) 851-2100 for today's price.
More tools for your material list
For deck boards, joists and a full deck layout, use the existing deck calculator and planner.