**Measure**out that distance from the deck to find the exact landing point. From this point, you can

**measure**the exact

**stair**height and determine the stringer and skirt length.

**Measure**the exact total rise (Photo 1). Divide the height (X) by your estimated number of risers to find the exact riser height.

How do you figure out stair treads?

Use a

**calculator**to**calculate**the**stair riser**length or the number of**steps**you'll need. Divide the height from the first floor to the top of the second floor by a predetermined height of your choice for the**riser**. The typical height of a**riser**is 6 or 7 inches (15 to 17.5 cm).How do you cut stair stringers?

**If it does, lay out the stringer so that the crown on the completed stair will face upward.**

- Lay out the first tread and the second riser.
- Lay out the second tread and the third riser.
- Mark the back of the top tread.
- Mark the plumb cut at the top of the stringer.
- Lay out the bottom riser.
- Adjust the first riser height.