Amount of Stringers

` = "Amount of Stringers"`

Enter a value for all fields

The Number of Stringers calculator computes how Diagram of Stair Stringers many stringers you need for your stairs based on a the width of the stairs and max separation.

INSTRUCTIONS: Choose units and enter the following:

(W) Width of Stairs
(S) Stringer Spacing Max (default: 16")

Number of Stringers (nS): The calculator returns the number of stair stringers needed. It also returns the ideal (even) spacing of the stringers. Note: This function will always return at least 2 stringers as you need two stringers for your stairs.

The Math / Science

This algorithm assumes there will always be at least two (2) stringers on either end.
The number of stringers is simply the width divided by the spacing rounded up plus one for the first stringer.
For the most structurally sound framing with the most even load on the stringers, they should be evenly spaced. This algorithm returns the ideal on-center spacing of the stringers.