Tank Dimensions
How to Use This Rectangular Tank Volume Calculator
This calculator helps you determine the exact capacity of any rectangular tank, whether it's a water storage tank, aquarium, fuel tank, or swimming pool. Simply follow these steps:
- Step 1: Enter the length, width, and height of your tank.
- Step 2: Select your measurement unit (Feet, Meters, Centimeters, or Inches).
- Step 3: Optionally set the fill level percentage to calculate partial volume.
- Step 4: 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!
Why Accurate Rectangular Tank Volume Matters
I've worked on countless projects where underestimating tank capacity caused major problems - from running out of water during dry spells to installing tanks that didn't fit in the designated space. That's exactly why I built this rectangular tank volume calculator - to help homeowners, farmers, and engineers get their water storage calculations right the first time.
Whether you're planning a water storage system for your home, sizing a fuel tank for a generator, or designing an aquarium, knowing your exact tank capacity in US Gallons, Liters, or Cubic Feet changes everything.
Rectangular Tank Volume Formula
The volume of a rectangular tank is calculated using the simple formula:
V = L × W × H
Where:
- V = Volume of the tank
- L = Length of the tank
- W = Width of the tank
- H = Height of the tank
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 |
Common Applications
Water Storage Tanks
Calculate the capacity of residential or commercial water storage tanks. A typical household of 4 people uses 300-400 gallons per day. Use this calculator to size your cistern or water tank appropriately.
Aquariums & Fish Tanks
Determine the exact water volume for your aquarium to properly dose medications, conditioners, and select appropriate filters and heaters.
Fuel & Oil Tanks
Calculate storage capacity for diesel, gasoline, or oil tanks. Knowing the exact volume helps with inventory management and regulatory compliance.
Swimming Pools
Estimate pool water volume for chemical treatment, heating requirements, and water filling costs.
Agriculture & Farming
Size water tanks for livestock, irrigation systems, and crop spraying equipment.
Tank Sizing Guide
Here are common rectangular tank sizes and their approximate capacities:
| Dimensions (ft) | Volume (ft³) | Gallons | Liters |
|---|---|---|---|
| 3 × 2 × 2 | 12 | 90 | 340 |
| 4 × 3 × 2 | 24 | 180 | 680 |
| 5 × 4 × 3 | 60 | 449 | 1,699 |
| 6 × 4 × 3 | 72 | 539 | 2,039 |
| 8 × 6 × 4 | 192 | 1,436 | 5,435 |
| 10 × 8 × 5 | 400 | 2,992 | 11,327 |
