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Concrete Footing Calculator

Size continuous, spread/pad, and round pier footings — concrete volume (cubic yards, bags, truck loads), rebar quantities, optional crushed-stone base, and a full cost breakdown with a downloadable PDF estimate.

Footing size, depth, and reinforcement must follow your local code and soil/structural design. Quantities are geometric estimates — verify with your engineer or building department. For planning purposes only.

Footing Details
1 Footing Type & Dimensions
ft
in
×
in
Common wall footing: 2x wall width, min 8" deep (check code)
in
×
in
in
×
in
Common pier/sonotube: 10", 12", 16", 18", 24"
ft
×
2 Reinforcement & Base
bars
Strip footings typically run 2-4 continuous bars, lapped at corners
Rebar size, spacing, and cover must follow your structural design / local code
3 Mix & Cost
10%
Footing trenches over-dig and slough — 10%+ overage is common
Yields: 40 lb ≈ 0.30 ft³ | 60 lb ≈ 0.45 ft³ | 80 lb ≈ 0.60 ft³
$/ cu yd
2024-2025 typical: $125 - $180 per cu yd (short-load fees under 1 yd)
$/ ft
#4 rebar material roughly $0.60 - $0.90 per linear ft
Footing Estimate
Concrete To Order
—
Enter your footing details to begin
Cubic Yards (w/ waste) —
80 lb Bags —
Rebar —
Full Cost Breakdown
Total footing volume—
Ready-mix concrete —
TOTAL ESTIMATE—
Cubic Meters —
Footprint area —
Truck loads (9 cu yd) —
Cost Breakdown Chart
Estimated cost by category ($)
All Bag Sizes — Your Footing
Bag SizeYieldBags NeededTotal WeightBest For

Bag counts cover the full — ft³ (waste included). Bagged mix usually beats ready-mix under ~1 cu yd.