01
The purpose
What does this calculator estimate?
How much dirt you'll dig out — in cubic yards and dump-truck loads — including working room and soil swell.
Construction & Design · F1
Pool Excavation Volume Calculator
How much dirt you'll dig out — in cubic yards and dump-truck loads — including working room and soil swell.
Measure the inputsAlways add working room — crews need space outside the shell to form and gunite.
Read the full resultExcavated soil expands about 25% loose, so you haul more volume than you dug.
Check the boundaryOver-dig the base by a foot for the compacted gravel layer under the shell.
Useful forConstruction & DesignPlanningComparisonVerification
Live calculation
Excavation inputs
✓ Checked May 2026
Enter pool size, depths, and dig allowances.
Calculated result
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Enter the required values to calculate.
Enter the known values. Let the engine handle the calculation.
✓ Formula checked↻ Live result○ No account needed
Planning estimate only. Confirm product labels, equipment specifications, qualified-professional advice and local requirements before acting.
The result, explained
Use the Pool Excavation Volume Calculator result with context.
How much dirt you'll dig out — in cubic yards and dump-truck loads — including working room and soil swell.
02
The tool
What information does it use?
- Pool length: Working room is added automatically.
- Pool width: enter a measured or verified value
- Shallow end depth: enter a measured or verified value
- Deep end depth: enter a measured or verified value
- Working room: Extra dig on each side for crews and forms.
- Base over-dig: Extra depth for the gravel base.
- Soil swell factor: Dug soil expands ~25% loose.
03
The method
How to use this calculator
- Pool lengthWorking room is added automatically.
- Pool widthEnter the value you can verify.
- Shallow end depthEnter the value you can verify.
- Deep end depthEnter the value you can verify.
- Working roomExtra dig on each side for crews and forms.
- Base over-digExtra depth for the gravel base.
- Soil swell factorDug soil expands ~25% loose.
04
The relationship
The formula in plain English
Excavation = (Length + working room) × (Width + working room) × (avg depth + over-dig)
Cubic yards = cubic ft × 0.037. Loose soil swells ~25%; a dump truck holds ~14 CY.05
Worked through
A worked example: 32 × 16 ft pool, 3.5/8 ft depths, 2 ft working room
- Excav L×W = 36 × 20 ft; avg depth = 5.75 + 1 over-dig = 6.75
- Cubic ft = 36 × 20 × 6.75 = 4,860
- CY = 4,860 × 0.037 = 180; ×1.25 swell ÷14 ≈ 16 trucks
| Pool size | Avg depth | Excavation CY | Truckloads* |
|---|---|---|---|
| 28 × 14 ft | 5.5 ft | 94 CY | 9 |
| 32 × 16 ft | 5.75 ft | 134 CY | 12 |
| 36 × 18 ft | 6.0 ft | 178 CY | 16 |
| 40 × 20 ft | 6.25 ft | 229 CY | 21 |
| 20 × 40 ft | 6.5 ft | 238 CY | 22 |
06
Why it matters
How the result supports the next decision
Always add working room — crews need space outside the shell to form and gunite.
Excavated soil expands about 25% loose, so you haul more volume than you dug.
07
Good inputs
Improve the estimate before relying on it
- Always add working room — crews need space outside the shell to form and gunite.
- Excavated soil expands about 25% loose, so you haul more volume than you dug.
- Over-dig the base by a foot for the compacted gravel layer under the shell.
- Call 811 to locate utilities before any digging — it's free and legally required.
- Haul-off is a major line item: count truckloads early so the bid isn't a surprise.
08
The boundary
How to interpret the result
Confirm structural assumptions, site conditions and local requirements with qualified professionals.
The engine reports invalid inputs and safety warnings beside the result. Resolve those messages before using the estimate.
09
Before acting
What should override this estimate?
- Measured site conditions and current test results
- Product labels and manufacturer specifications
- Qualified-professional advice and applicable local codes
10
Common questions
Frequently asked questions
How much dirt comes out of a pool excavation?
Take the pool footprint plus working room on each side, times the average depth plus base over-dig, to get cubic feet, then convert to cubic yards. A typical 32-by-16-foot pool yields roughly 130 to 160 cubic yards of in-ground soil before swell — more once it's dug loose.
Why does excavated soil expand?
Compacted in the ground, soil is dense; once dug it breaks up and traps air, swelling roughly 25 percent in loose volume. So although you remove a fixed in-ground volume, you must haul away about a quarter more than that. The swell factor is why hauling estimates exceed the raw dig number.
How many dump trucks for a pool dig?
Standard dump trucks carry about 14 cubic yards. Take your loose (swelled) excavation volume and divide by 14, rounding up. A typical residential pool produces around 12 to 15 truckloads of spoil, which is why haul-off is one of the larger early costs in a build.
Do I add working room to the dig?
Yes. The hole must be larger than the pool itself so crews can set forms, place steel, and shoot gunite from outside the shell. Adding about two feet on each side is typical. Skipping it leaves no room to work and forces awkward, slow construction.
Should I call before digging a pool?
Always. Call 811 (in the US) before excavation so utilities mark buried gas, electric, water, and communication lines. It's free, legally required, and prevents dangerous and expensive strikes. Schedule it well ahead, since locating can take a few business days.
How many cubic yards to dig a pool?
Often 130–160 cubic yards in-ground for a 32×16 pool, more once swelled loose for hauling.
How many truckloads of dirt from a pool?
Roughly 12–15 standard 14-cubic-yard dump truck loads for a typical residential pool.
Does dug soil take more space?
Yes — it swells about 25% loose, so you haul more volume than the in-ground dig.
Primary sources
Use the result with current guidance.
These official references support safe planning context. Product labels, local requirements and qualified-professional advice take priority over a general calculator estimate.