Equipment & AC Pads concrete calculator
Enter your dimensions — we'll size the load with a 10% waste factor. Typical equipment & ac pads order: ~1 yd³.
How much concrete do you need?
Pick your project shape — we'll size the load.
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How the math works
length (ft) × width (ft) × thickness (ft) ÷ 27 = cubic yards
- 1 Multiply length by width in feet to get the area of the pour.
- 2 Convert thickness to feet (4 in = 0.33 ft) and multiply — that gives cubic feet.
- 3 Divide by 27 (the cubic feet in one cubic yard) to get cubic yards.
- 4 Add 10% waste for uneven ground and spillage, then round up to the quarter yard.
How to use this calculator
- 1 Measure the pour. Measure the length and width of the pour in feet, and pick the thickness in inches (4 in is typical).
- 2 Enter the dimensions. Type the numbers into the equipment & ac pads calculator — it converts units and divides by 27 to get cubic yards.
- 3 Check the waste factor. The result includes 10% waste for uneven ground and spillage, rounded up to the quarter yard (1 yd³ minimum).
- 4 Price the delivery. Send the yardage with your ZIP code to get an all-in delivered price — metered trucks bill only what's actually poured.
Typical equipment & ac pads quantities
Common equipment and AC pad sizes — small pours are exactly what metered trucks are for:
| Pad size | Thickness | Volume | Order (with waste) |
|---|---|---|---|
| 3 × 3 ft | 4 in | 0.11 yd³ | 1 yd³ |
| 4 × 4 ft | 4 in | 0.20 yd³ | 1 yd³ |
| 4 × 6 ft | 6 in | 0.44 yd³ | 1 yd³ |
| 5 × 8 ft | 6 in | 0.74 yd³ | 1 yd³ |
Below ~1 yd³ the 1-yard minimum applies — combining two or three small pads into one delivery is the usual move.
Common ordering mistakes
-
Measuring the slab, not the forms
Measure inside the forms as they're actually set — a “10 × 12” equipment & ac pad pour is whatever the forms enclose, and an inch each way moves the total.
-
Trusting the ground to be flat
Florida sand settles and over-digs. If the sub-base dips half an inch across the pour, that missing volume comes out of your load — grade and compact before the truck arrives.
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Ordering the bare math
Skipping the waste factor is the classic way to come up half a wheelbarrow short. With a metered truck, rounding up costs nothing unless it's actually poured.
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Mixing up inches and feet
Thickness is the usual culprit: 4 inches is 0.33 feet. Feed the calculator inches where it asks for inches and it handles the conversion.
Frequently asked questions
How accurate does my estimate need to be?
Close is enough: metered trucks bill the actual yards poured to the nearest quarter yard. The calculator adds a 10% waste factor so you don't come up short.
Which mix should I use for equipment & ac pads?
4000 PSI Structural Mix is the standard recommendation for equipment & ac pads. Higher-strength mix for driveways with heavy loads, footings, equipment pads and structural work.
How thick should an AC or equipment pad be?
4 inches for AC condensers and pool equipment, 5–6 inches for generators and heavier units. Get the pad dead level — installers will reject a sloped one.
Delivered pricing by city
Related calculators & tools
Next step: read the Equipment & AC Pads guide or get your delivered price with the button above.