Pond Volume Calculator
Building a koi pond or water garden? Calculate the volume to choose the right pump, filter, and treatment dosage.
🐸Pond Volume
Formula:
Volume = L × W × D × 0.85
For irregular shapes (approximate)
Feet
Feet
Feet
Estimated Volume
US Gallons
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Liters
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Mathematical Principles
Pond volume is calculated similarly to pools, but often requires an adjustment factor for irregular shapes and sloping sides.
1. Irregular Shapes
For natural ponds that aren't perfect rectangles, we multiply the maximum length and width by the depth, and then by a factor (usually 0.85) to account for curves and slopes.Volume = Length × Width × Depth × 0.85
2. Circular Ponds
For round ponds:Volume = π × Radius² × Depth
3. Gallon Conversion
Multiply cubic feet by 7.48 to get US gallons.Gallons = Cubic Feet × 7.48
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Frequently Asked Questions
Measure the maximum length and maximum width, then multiply by 0.85 (or use our Irregular mode). Alternatively, measure the width at several points and take the average.
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Tips
- Enter the dimensions in the same unit for consistency.
- Results update automatically as you type.
- Use the unit selector to convert between different measurement systems.
Need Help?
Check out our guide on how to use this calculator properly and understand the concepts behind it.
Pond calculation guide