Footing Calculator

Calculate concrete for continuous, spread, and pier footings

Continuous (Strip) Footing

Spread (Pad) Footing

Pier / Post Footing

Footing Materials

Concrete
0
Concrete
cubic yards
0
Volume
cubic feet
0
80 lb Bags
~0.6 cf each
0
60 lb Bags
~0.45 cf each
Reinforcement
0
Rebar
linear ft
0
20 ft Bars
#4 rebar
0
Tie Wire
lbs
0
Rebar Chairs
Summary
0
Total Length
linear ft
0
Footing Count
0
Per Footing
cu ft
Footing depth guidelines:
Below frost line (varies by region: 12"-48")
Minimum 12" into undisturbed soil
Width = 2× wall thickness (minimum)

Footing Size Guidelines

Application Width Depth Rebar
Light load (deck)12"8"None
Residential wall16"8"2-#4 cont.
2-story residential20"10"3-#4 cont.
Heavy/Commercial24"+12"4-#5 cont.
Pier (deck post)12" dia36"+Optional
Pier (structural)18"+ dia48"+4-#4 vert.