Pool Excavation Volume Calculator
Cubic yards for pool dig from shape and depth.
About this calculator
Shell Thickness (in) and Over-Dig Clearance (ft) both widen the excavation footprint (added to length and width on each side) AND deepen it (shell thickness adds to both the shallow and deep excavation depths, on top of a fixed 4 in gravel base allowance) -- so a thicker shell doesn't just mean more concrete/gunite, it directly grows the volume of earth removed too, in both plan dimensions and depth simultaneously. Pool Shape applies its shape factor (1.0 rectangular, 0.8 oval/kidney, 0.75 freeform) to the FULL excavation volume, not just the pool's own water-surface area the way a deck or rebar calculation might -- so an oval or freeform pool's total dig volume shrinks by the same 20-25% the shape factor implies, not a smaller adjustment scaled down for the shell and over-dig margins added around it.
Haul-Away Volume (cu yd) is always larger than Excavation Volume (cu yd) by a fixed 25% swell factor -- loosened, excavated earth takes up more space than it did compacted in the ground, which is standard practice for estimating truck loads and disposal cost, and this calculator applies that factor uniformly regardless of soil type or pool shape.
Inputs
Results
Excavation volume (cu yd)
165.9
How to Use This Calculator
- Enter the pool's finished interior length and width in feet.
- Set the shallow end and deep end finished depths in feet.
- Select pool shape: 1 = rectangular, 2 = oval/kidney, 3 = freeform.
- Enter the over-dig clearance (typically 1.5 ft) for forming access around the shell.
- Enter the gunite/shotcrete shell thickness in inches (6-9 inches for residential pools).
- Review Excavation Volume (cu yd), Haul-Away Volume, and Dump Truck Loads to get accurate excavation bids.
How the result changes with Pool length (ft)
| Pool length (ft) | Excavation volume (cu yd) |
|---|---|
| 15 | 93.4 |
| 23 | 132.1 |
| 45 | 238.4 |
| 75 | 383.4 |
What each input means
- Pool length (ft)
- Interior finished length of the pool.
- Pool width (ft)
- Interior finished width of the pool.
- Shallow end depth (ft)
- Finished depth at the shallow end.
- Deep end depth (ft)
- Finished depth at the deep end.
- Pool shape (1=rect, 2=oval, 3=free)
- 1 = Rectangular, 2 = Oval/Kidney, 3 = Freeform. Adjusts volume by shape factor.
- Over-dig clearance (ft)
- Extra clearance around pool for forming and structural access. Typically 1-2 feet.
- Shell thickness (in)
- Gunite/shotcrete shell thickness. Residential pools typically use 6-9 inches.
What each result means
- Excavation volume (cu yd)
- In-situ (bank) cubic yards of earth to remove.
- Haul-away volume (cu yd)
- Volume after swell factor (25%) for loose hauling.
- Dump truck loads
- Standard 10 cu yd tandem dump truck loads needed.
- Estimated weight (tons)
- Approximate weight of excavated material at 2,800 lbs/cu yd.
- Excavation length (ft)
- Total dig length including shell thickness and over-dig.
- Excavation width (ft)
- Total dig width including shell thickness and over-dig.
- Average dig depth (ft)
- Average excavation depth including shell and gravel base.
- Volume (cu ft)
- Total excavation volume in cubic feet.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPool length (ft) = 30, Pool width (ft) = 15, Shallow end depth (ft) = 3.5, Deep end depth (ft) = 8 = 7 input(s) provided
- Calculate Excavation volumeExcavation volume = volumeCuFt / 27165.9 = 165.9
- Calculate Haul-away volumeHaul-away volume = volumeCuYd * swellFactor207.4 = 207.4
- Calculate Dump truck loadsDump truck loads21 = 21
Engine last updated . Checked against 3 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why does increasing Shell Thickness (in) change the excavation volume, not just the concrete quantity?
Because a thicker shell needs a bigger hole to sit inside, not just more material to fill it. Shell Thickness (in) is added to the excavation's length and width (on each side) AND to its depth (on top of the pool's own shallow and deep depths, plus a fixed gravel base allowance) -- so it grows Excavation Volume (cu yd) in three dimensions simultaneously, on top of whatever it separately does to shell material quantity elsewhere.
Does the pool shape factor apply to the whole dig, or just the water surface?
The whole dig. Pool Shape's factor (1.0 rectangular, 0.8 oval/kidney, 0.75 freeform) multiplies the entire excavation volume -- length x width x average depth -- not just a water-surface-area term. That means an oval pool's total earth removal comes in about 20% below a rectangular pool built to the same length, width, and depths, and a freeform pool's about 25% below, all the way through to Haul-Away Volume (cu yd), Dump Truck Loads, and Estimated Weight (tons).
Why is Haul-Away Volume (cu yd) always more than Excavation Volume (cu yd)?
Excavation Volume (cu yd) is the in-situ, "bank" volume -- how much space the earth occupies compacted in the ground before you dig it. Once removed and loosened, it swells; this calculator applies a fixed 25% swell factor to get Haul-Away Volume (cu yd), the number that actually matters for sizing dump truck loads and disposal cost. The two numbers describe the same material in two different states, not two different quantities of dirt.
Does Over-Dig Clearance (ft) affect anything besides the excavation volume?
Within this calculator, no -- Over-Dig Clearance (ft) only widens Excavation Length (ft) and Excavation Width (ft) (on each side), and through them, Excavation Volume (cu yd), Haul-Away Volume (cu yd), Dump Truck Loads, and Estimated Weight (tons). It's meant to represent the extra working room a crew needs around the shell for forming and structural access, not a separate cost or material line of its own.
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Trench Volume Calculator
Calculate trench excavation volume using trapezoidal cross-section with truck load and excavation time estimates.
RemediationSoil Remediation Cost Calculator
Estimate soil excavation and disposal costs by contaminant type, volume, and disposal method.
Construction & Building TradesConcrete Calculator
Calculate how much concrete you need in cubic yards, bags, and cost for slabs, footings, and walls.
Pool ConstructionRebar Grid Calculator
Rebar quantity for gunite/shotcrete pool shell.
Pool ConstructionPool Plumbing Calculator
Pipe sizing and plumbing materials for pool circulation.
More in Construction & Building Trades.