Stair Rise Calc
Answer One flight, cut as a single stringer.

10-step stair stringer

Total rise it covers 40into77in
Risers
10
Typical total rise
70in70.000 in5 ft 10 in
Board length
12ft
The stringer board as it lies for marking, with 10 notches cut along its top edge from a 12-foot board. One notch is dimensioned 7.000 inches on the rise and 11.00 inches on the run, the waste is hatched, and the bottom cut is dropped 1.00 inches. Rise mark7 in Run mark11 in Bottom cut1 in Board12 ft
Range

Every total rise this stringer covers

Pick your own total rise. Every row is cut with the same number of risers.
Total rise Riser Tread Total run Stringer Marked Board Result
54in 53/8in 14in 126in 1371/16in 1501/16in 14ft Within
55in 51/2in 14in 126in 1371/2in 1507/16in 14ft Within
56in 55/8in 1313/16in 1243/16in 1361/4in 14815/16in 13ft Within
57in 511/16in 135/8in 1223/8in 135in 1477/16in 13ft Within
58in 513/16in 133/8in 1205/8in 13313/16in 146in 13ft Within
59in 57/8in 133/16in 11813/16in 1325/8in 1449/16in 13ft Within
60in 6in 13in 117in 1311/2in 1433/16in 13ft Within
61in 61/8in 1213/16in 1153/16in 1303/8in 14113/16in 13ft Within
62in 63/16in 125/8in 1133/8in 1291/4in 1407/16in 13ft Within
63in 65/16in 123/8in 1115/8in 1281/8in 1391/16in 13ft Within
64in 63/8in 123/16in 10913/16in 1271/16in 1373/4in 12ft Within
65in 61/2in 12in 108in 1261/16in 1361/2in 12ft Within
66in 65/8in 1113/16in 1063/16in 1251/16in 1353/16in 12ft Within
67in 611/16in 115/8in 1043/8in 1241/16in 13315/16in 12ft Within
68in 613/16in 113/8in 1025/8in 1231/16in 1323/4in 12ft Within
69in 67/8in 113/16in 10013/16in 1221/8in 1319/16in 12ft Within
70in 7in 11in 99in 1211/4in 1303/8in 12ft Within
71in 71/8in 1013/16in 973/16in 1203/8in 1291/4in 12ft Within
72in 73/16in 105/8in 953/8in 1191/2in 1281/8in 12ft Within
73in 75/16in 103/8in 935/8in 11811/16in 1271/16in 12ft Within
74in 73/8in 103/16in 9113/16in 11715/16in 126in 12ft Within
75in 71/2in 10in 90in 1171/8in 125in 11ft Within
76in 75/8in 10in 90in 11713/16in 1255/8in 11ft Within
77in 711/16in 10in 90in 1187/16in 1263/16in 12ft Within
Solution

Every dimension of this flight

Worked at a total rise of 70.00 inches.
DimensionValue
Typical total rise 70in70.00 in5 ft 10 in
Risers 10
Riser height 7in7.000 in
Treads 9
Tread run 11in11.000 in
Total run 99in99.000 in8 ft 3 in
One step along the edge 131/16in13.038 in
Marked length 1303/8in130.384 in10 ft 10.38 in
Stringer length 1211/4in121.248 in10 ft 1.25 in
Board length 12ft
Angle 32.5°
Bottom cut deduction 1in1.000 in
Cut list

The marks, bottom to top

Measured along the edge of the board from the foot, after the bottom cut.
Marked length
1303/8in130.384 in10 ft 10.38 in
Bottom cut deduction
1in
  1. 7in×11in 131/16inFrom the foot
  2. 7in×11in 261/16inFrom the foot
  3. 7in×11in 391/8inFrom the foot
  4. 7in×11in 521/8inFrom the foot
  5. 7in×11in 653/16inFrom the foot
  6. 7in×11in 781/4inFrom the foot
  7. 7in×11in 911/4inFrom the foot
  8. 7in×11in 1045/16inFrom the foot
  9. 7in×11in 1173/8inFrom the foot
  10. 7in×11in 1303/8inFrom the foot
Code

Each figure against the limit it has to meet

Dimension Limit Code Result
Riser height, maximum 73/4in IRC 2021 (residential) Within
Tread depth, minimum 10in IRC 2021 (residential) Within
Stair width, minimum 36in IRC 2021 (residential) Within
Riser height, minimum 4in ADA 2010504.2 Within
Riser height, maximum 7in ADA 2010504.2 Within
Tread depth, minimum 11in ADA 2010504.2 Within
Nosing projection, maximum 11/2in ADA 2010504.5 Within
Asked about this

Questions people search for

How high will a 10-step stringer go?
A 10-step stringer covers 40 to 77 inches of total rise, floor to floor. Below that the risers fall under the 4 inch minimum; above it they pass 7 3/4 inches.
How long a board do you need for a 10-step stringer?
At a 70 inch total rise the marks run 130.384 inches along the edge of the board, so the shortest board that takes them with the top and bottom cuts is 12 feet.
How do you lay out a 10-step stringer?
Set a framing square to 7.000 inches on the tongue and 11.00 inches on the blade and step it 10 times along the board, then drop the bottom cut by one tread thickness. Every mark is listed on this page, and the stringer layout page shows where each one goes.
Next door

Other step counts

Source

Where the limits come from

2 sources, with the date each was read

Building codes are adopted and amended locally. Confirm every figure with the code your jurisdiction has adopted before you cut.

Updated September 2026