Concrete Pad Cost Calculator
Price a compact concrete pad from dimensions, thickness, and what will sit on it — with optional gravel base and anchor bolts.
Your pad
Length (ft)
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Length
Pad length — hot tub pads are often 8–10 ft. |
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Width (ft)
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Width
Pad width matching equipment footprint plus a small walk-around margin. |
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Thickness
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Thickness
Hot tubs and generators usually need thicker pads than a light shed skid. |
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Primary use
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Use
Heavier intended loads nudge labor and reinforcement assumptions in the midpoint. |
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Your state
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Your state
Scales midpoints for typical state-level labor and material costs versus the U.S. average. Not a local contractor bid. |
Options
How to use this calculator
- Enter pad length and width.
- Choose thickness and what the pad supports.
- Select your state.
- Toggle gravel base or anchor bolts if needed.
Results explained
Small pads often price higher per sq ft than large slabs because mobilization is spread over less area — the midpoint reflects that.
Quick reference: concrete pad midpoints
| 4 in pad baseline | Per sq ft |
|---|---|
| Shed use | $7.45 |
| Hot tub add-on | +$1.85 |
| Equipment add-on | +$2.40 |
| Gravel base | +$2.15 |
How the estimate is built
Thickness rate plus use-case add-on × area, optional gravel per sq ft and anchor flat fee, state scaled.
Example scenario
A 10×10 ft hot tub pad (5 in, gravel on) at U.S. average is roughly $1,350 before state adjustment.
FAQ
Can I pour directly on dirt?
Most specs want compacted aggregate — gravel base is checked by default for that reason.
Frost depth?
Cold climates may need deeper footings than a floating pad — verify locally.
Delivery minimums?
Very small pours may hit truck minimum charges; onsite quotes can exceed this model.