Concrete Pad Calculator

Work out the concrete for a pad — an AC unit, shed, hot tub or generator base — in cubic yards, bags and total cost.

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How it works

Cubic feet = Length × Width × (Thickness ÷ 12) · Cubic yards = Cubic feet ÷ 27 · Cost = Cubic yards × price per yard. An 80-lb bag yields ~0.6 cu ft.

Example

A 10 × 10 ft pad at 4 in is about 1.23 cubic yards — roughly $185 at $150/yard.

Frequently asked questions

Bags or ready-mix?
Bags suit small jobs; over ~1 cubic yard, ready-mix delivery is usually cheaper. Add ~10% for waste.