1 Your measurements

Type feet and inches the way you'd write them, like 12' 6" or 30 3/8. Decimals work too.

in
Code maximum is 7¾". 6–7½" is comfortable.
in
Code minimum is 10".
ft
in
At least 36" in front of an exterior door. Enter 0 for no landing.
%

2 What to buy

Concrete needed
1.66 yd³
44.9 cu ft incl. waste
80 lb bags
75
or 100 × 60 lb
Ready-mix order
1.75 yd³
rounded up to ¼ yard
  • ✓ Riser 7" ≤ 7.75" IRC maximum
  • ✓ Tread 11" ≥ 10" IRC minimum
  • ✓ Landing 36" ≥ 36" deep at an exterior door
  • ✓ Width 48" ≥ 36" IRC minimum
Steps (treads)3
Risers4
Height at the top28"
Total run (front to back)69"
Volume before waste40.83 cu ft
40 lb bag150 bags
60 lb bag100 bags
80 lb bag75 bags

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