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

14-step stair stringer

Total rise it covers 56into108in
Risers
14
Typical total rise
98in98.000 in8 ft 2 in
Board length
16ft
The stringer board as it lies for marking, with 14 notches cut along its top edge from a 16-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 Board16 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
85in 61/16in 127/8in 1671/8in 1871/2in 1991/16in 18ft Within
86in 61/8in 1211/16in 1655/16in 1865/16in 19711/16in 17ft Within
87in 63/16in 129/16in 1637/16in 1851/8in 1965/16in 17ft Within
88in 65/16in 127/16in 1619/16in 184in 195in 17ft Within
89in 63/8in 125/16in 15911/16in 18213/16in 19311/16in 17ft Within
90in 67/16in 121/8in 1577/8in 18111/16in 1923/8in 17ft Within
91in 61/2in 12in 156in 1805/8in 1911/16in 17ft Within
92in 69/16in 117/8in 1541/8in 1791/2in 18913/16in 17ft Within
93in 65/8in 1111/16in 1525/16in 1787/16in 1889/16in 17ft Within
94in 611/16in 119/16in 1507/16in 1773/8in 1875/16in 17ft Within
95in 613/16in 117/16in 1489/16in 1763/8in 1861/16in 17ft Within
96in 67/8in 115/16in 14611/16in 1755/16in 1847/8in 16ft Within
97in 615/16in 111/8in 1447/8in 1745/16in 18311/16in 16ft Within
98in 7in 11in 143in 1733/8in 1829/16in 16ft Within
99in 71/16in 107/8in 1411/8in 1723/8in 1813/8in 16ft Within
100in 71/8in 1011/16in 1395/16in 1717/16in 1801/4in 16ft Within
101in 73/16in 109/16in 1377/16in 1709/16in 1793/16in 16ft Within
102in 75/16in 107/16in 1359/16in 16911/16in 1781/8in 16ft Within
103in 73/8in 105/16in 13311/16in 16813/16in 1771/16in 16ft Within
104in 77/16in 101/8in 1317/8in 16715/16in 176in 16ft Within
105in 71/2in 10in 130in 1671/8in 175in 16ft Within
106in 79/16in 10in 130in 1673/4in 1755/8in 16ft Within
107in 75/8in 10in 130in 1683/8in 1763/16in 16ft Within
108in 711/16in 10in 130in 169in 17613/16in 16ft Within
Solution

Every dimension of this flight

Worked at a total rise of 98.00 inches.
DimensionValue
Typical total rise 98in98.00 in8 ft 2 in
Risers 14
Riser height 7in7.000 in
Treads 13
Tread run 11in11.000 in
Total run 143in143.000 in11 ft 11 in
One step along the edge 131/16in13.038 in
Marked length 1829/16in182.538 in15 ft 2.54 in
Stringer length 1733/8in173.358 in14 ft 5.36 in
Board length 16ft
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
1829/16in182.538 in15 ft 2.54 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
  11. 7in×11in 1437/16inFrom the foot
  12. 7in×11in 1567/16inFrom the foot
  13. 7in×11in 1691/2inFrom the foot
  14. 7in×11in 1829/16inFrom 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 14-step stringer go?
A 14-step stringer covers 56 to 108 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 14-step stringer?
At a 98 inch total rise the marks run 182.538 inches along the edge of the board, so the shortest board that takes them with the top and bottom cuts is 16 feet.
How do you lay out a 14-step stringer?
Set a framing square to 7.000 inches on the tongue and 11.00 inches on the blade and step it 14 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