📏 Tank Dimensions
💡 How to Use This Oval Tank Volume Calculator
This calculator helps you determine the exact capacity of any oval (elliptical) tank, whether it's a water storage tank, fuel tank, aquaculture tank, or custom container. Simply follow these steps:
- Step 1: Enter the length (major axis), width (minor axis), and height of your tank.
- Step 2: Select your measurement unit (Feet, Meters, Centimeters, or Inches).
- Step 3: Choose tank orientation (horizontal or vertical).
- Step 4: Optionally set the fill level percentage to calculate partial volume.
- Step 5: Click "Calculate Tank Volume" to see results in multiple units.
The calculator instantly converts between cubic feet, cubic meters, US gallons, and liters — no manual conversions needed!
📐 Oval Tank Volume Formula
The volume of an oval (elliptical) tank is calculated using the formula:
V = π × a × b × h
Where:
- V = Volume of the tank
- π = Pi (approximately 3.14159)
- a = Half the length (L/2) - semi-major axis
- b = Half the width (W/2) - semi-minor axis
- h = Height of the tank
For horizontal oval tanks, the formula remains the same - the height becomes the horizontal length.
Once you have the volume in cubic units, use these conversion factors:
| From | To | Multiply By |
|---|---|---|
| Cubic Feet (ft³) | US Gallons | 7.48052 |
| Cubic Feet (ft³) | Liters | 28.3168 |
| Cubic Meters (m³) | US Gallons | 264.172 |
| Cubic Meters (m³) | Liters | 1000 |
| Cubic Inches (in³) | US Gallons | 0.004329 |
| Cubic Centimeters (cm³) | Liters | 0.001 |
🏭 Common Applications
💧 Water Storage Tanks
Oval water tanks are popular for residential and commercial use because they fit in tight spaces (like basements or narrow side yards) while providing excellent storage capacity. Their elliptical shape offers better space efficiency than round tanks.
⛽ Fuel Storage Tanks
Many fuel storage tanks, especially for diesel and heating oil, use oval shapes to maximize capacity in confined spaces like garages or utility rooms.
🐟 Aquaculture & Fish Farming
Oval tanks are common in aquaculture because they create better water circulation patterns than rectangular tanks, improving fish health and waste management.
🚛 Tanker Trucks
Many liquid transport tankers use oval or elliptical cross-sections to lower the center of gravity for better stability during transport.
🏠 RV & Marine Tanks
Recreational vehicles and boats often use oval holding tanks (fresh water, grey water, black water) to fit within the limited irregular spaces available.
📏 Oval Tank Sizing Guide
Here are common oval tank sizes and their approximate capacities:
| Length (ft) | Width (ft) | Height (ft) | Volume (ft³) | Gallons | Liters |
|---|---|---|---|---|---|
| 4 | 2 | 3 | 18.8 | 141 | 533 |
| 5 | 3 | 4 | 47.1 | 352 | 1,334 |
| 6 | 4 | 4 | 75.4 | 564 | 2,135 |
| 8 | 5 | 5 | 157.1 | 1,175 | 4,449 |
| 10 | 6 | 6 | 282.7 | 2,115 | 8,008 |
| 12 | 8 | 6 | 452.4 | 3,384 | 12,814 |
| 15 | 10 | 8 | 942.5 | 7,050 | 26,693 |
🔄 Oval vs. Round vs. Rectangular Tanks
- Oval Tanks: Best for tight spaces, lower center of gravity, good structural strength, moderate manufacturing cost.
- Round (Cylindrical) Tanks: Strongest structural design, most efficient material usage, but requires more floor space.
- Rectangular Tanks: Most space-efficient for corners, easier to manufacture, but requires thicker walls for the same pressure rating.
Choose an oval tank when you need to balance space constraints, structural integrity, and cost-effectiveness.