Stair Rise Calc
Answer Worked out from a total rise of 96.00 inches, floor to floor.

Concrete steps calculator

Concrete8.15cu yd
Total rise
96in96.00 in8 ft
Concrete
220.00cu ft
A section through the poured steps: 14 steps, 96.00 inches of total rise over 143.00 inches of run, each 6.857 inches high and 11.00 inches deep, running 48 inches across. Total rise96 in Total run143 in Riser height67⁄8 in Tread run11 in Step width48 in
Given

What this was worked out from

in
in
in
in
in
in

These are the figures every number on this page is worked for.

Solution

Every dimension of this flight

To the nearest sixteenth
DimensionValue
Total rise 96in96.00 in8 ft
Risers 14
Riser height 67/8in6.857 in
Treads 13
Tread run 11in11.000 in
Total run 143in143.000 in11 ft 11 in
One step along the edge 1215/16in12.962 in
Marked length 1811/2in181.472 in15 ft 1.47 in
Stringer length 1721/4in172.235 in14 ft 4.24 in
Board length 16ft
Angle 31.9°
Stringer angle 33.9°
2 risers + 1 tread 2411/16in24.71 in2 ft 0.71 in
Bottom cut deduction 1in1.000 in
Tread thickness 1in1.00 in
Nosing 1in1.00 in
Stair width 36in36.00 in3 ft
Options

What each step takes

Step width
48in
Step Volume
1 2.10cu ft
2 4.19cu ft
3 6.29cu ft
4 8.38cu ft
5 10.48cu ft
6 12.57cu ft
7 14.67cu ft
8 16.76cu ft
9 18.86cu ft
10 20.95cu ft
11 23.05cu ft
12 25.14cu ft
13 27.24cu ft
14 29.33cu ft

Volume only. No bag count is claimed until a manufacturer's yield is on file.

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
Calculators

Work out one part on its own

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