Enter Pool Details
Example Data Table
| Shape | Key Dimensions | Depth Profile | Estimated Gallons | Approx. Excavation |
|---|---|---|---|---|
| Rectangular | 30 ft × 15 ft | Flat, 5 ft | 16,831 gal | 84.85 yd³ with 8% overdig |
| Circular | 18 ft diameter | Flat, 4.5 ft | 8,563 gal | 43.20 yd³ with 8% overdig |
| Oval | 28 ft × 16 ft | 3 ft to 8 ft slope | 18,445 gal | 93.05 yd³ with 8% overdig |
Formula Used
Rectangular surface area: Length × Width
Circular surface area: π × (Diameter ÷ 2)²
Oval surface area: π × (Major Axis ÷ 2) × (Minor Axis ÷ 2)
Average depth: Flat depth, or (Shallow Depth + Deep Depth) ÷ 2
Pool volume: Surface Area × Average Depth
Gallons: Cubic Feet × 7.48051948
Liters: Gallons × 3.785411784
Water weight: Gallons × 8.34 lb
Estimated fill time: Total Gallons ÷ Fill Rate
Approx. excavation: Pool Volume × (1 + Overdig %)
How to Use This Calculator
- Select the pool shape that best matches the plan.
- Choose feet or meters for the input values.
- Enter plan dimensions for the chosen pool shape.
- Select a flat or sloped depth profile.
- Enter depth values, fill rate, and overdig allowance.
- Press the calculate button to show results above the form.
- Review gallons, cubic volume, excavation, load, and fill time.
- Use the CSV or PDF buttons to save the output.
Frequently Asked Questions
1) How do I calculate pool volume quickly?
Find the surface area from the pool shape. Multiply that area by the average water depth. Then convert cubic volume into gallons or liters for planning and filling.
2) Why does average depth matter so much?
Volume changes directly with average depth. A small depth increase can add a large amount of water, especially on wide or long pools.
3) How is a sloped pool handled?
The calculator uses the mean of shallow and deep depths. This works well for standard linear floor slopes and gives a practical estimate for water capacity.
4) What does the excavation result represent?
It is an approximate construction allowance. The tool takes the water volume and increases it by your overdig percentage to estimate excavated material.
5) Does this calculator support meters and liters?
Yes. You can enter dimensions in meters, and the calculator will still return metric and imperial outputs for easier review and comparison.
6) What is the water weight used for?
Water weight helps with structural awareness, transport planning, and site load thinking. It also helps communicate the scale of a filled pool during construction review.
7) Is the fill time exact?
No. It is an estimate based on a constant fill rate. Real filling time changes with hose pressure, source variations, and flow losses.
8) Can I use this for liners, concrete, or coping estimates?
Yes, partly. Surface area and perimeter outputs help early planning, but final material takeoffs still need detailed wall, floor, and finish specifications.