Tank Volume Calculator
Calculate the liquid capacity of your storage tank in multiple units with our precise volume calculator.
Tank Capacity Result
Volume:
Gallons: (US Liquid Gallons)
Liters:
Cubic Feet:
Calculation Error
Tank Volume Calculation Formulas
Understand the mathematical formulas behind our tank capacity calculations:
Cylindrical Tank Volume Calculation
For vertical or horizontal cylindrical tanks (common in water storage and fuel tanks):
Volume = π × (diameter ÷ 2)² × height
Where π ≈ 3.14159 and diameter is the internal width of the tank
Rectangular Tank Volume Calculation
For box-shaped tanks (common in aquariums and industrial containers):
Volume = length × width × height
All dimensions should be internal measurements in feet
Oval Tank Volume Calculation
For horizontal oval tanks (common in transportation and storage):
Volume = π × (major axis ÷ 2) × (minor axis ÷ 2) × height
Major axis is the longest diameter, minor axis is the shortest
Capsule Tank Volume Calculation
For tanks with hemispherical ends (common in pharmaceutical and chemical industries):
Volume = π × (diameter ÷ 2)² × (cylinder length + (4/3 × radius))
Where radius = diameter ÷ 2
Tank Volume Conversion Reference
Liquid Volume Conversions
- • 1 US gallon = 3.78541 liters
- • 1 liter = 0.264172 US gallons
- • 1 imperial gallon = 1.20095 US gallons
- • 1 barrel (petroleum) = 42 US gallons
Volume to Capacity
- • 1 cubic foot = 7.48052 US gallons
- • 1 cubic foot = 28.3168 liters
- • 1 cubic meter = 264.172 US gallons
- • 1 cubic meter = 1000 liters
Frequently Asked Questions
How do I measure my tank dimensions accurately?
For best results:
- Measure internal dimensions (excluding tank walls)
- For cylindrical tanks, measure diameter at the widest point
- For oval tanks, measure both major and minor axes
- Use consistent units (all in feet or all in inches)
Does this calculator account for tank thickness?
This calculator computes total internal volume. For precise capacity calculations, subtract wall thickness from your measurements or consult your tank specifications.
How do I calculate partial tank volume?
For partially filled tanks, measure the liquid height/depth instead of the full tank height. The calculator will compute the volume based on the liquid level.