Tank Volume Calculator
Calculate tank volume and fill level for horizontal and vertical cylinders, rectangles, ovals, capsules, and more. Free online tank volume calculator in gallons and liters.
What is the Tank Volume Calculator?
The Tank Volume Calculator is a free online tool that estimates the total capacity and filled volume of tanks in various shapes including horizontal and vertical cylinders, rectangles, ovals, and capsules. Whether you are calculating water tank capacity, fuel tank volume, or chemical storage, this calculator provides accurate results in U.S. gallons, imperial gallons, liters, cubic feet, and cubic meters. For general volume needs, try our Volume Calculator.
How to Use the Tank Volume Calculator
Select your tank shape from the dropdown menu. Enter the tank dimensions in your preferred unit (feet, inches, meters, etc.). For partially filled tanks, enter the fill depth to see the filled volume. The calculator supports seven tank shapes: horizontal cylinder, vertical cylinder, rectangle, horizontal oval, vertical oval, horizontal capsule, and vertical capsule.
Results update instantly and display total capacity and filled volume for each measurement unit. Use this calculator for water tanks, oil tanks, fuel storage, chemical containers, and any other liquid storage applications.
Common Tank Volume Formulas
Understanding how tank volumes are calculated can help you verify results and plan your storage needs:
- Horizontal Cylinder: V = π × r² × l (where r is radius, l is length)
- Vertical Cylinder: V = π × r² × h (where r is radius, h is height)
- Rectangle Tank: V = l × w × h (length times width times height)
- 1 cubic foot = 7.48 U.S. gallons = 28.32 liters
- 1 U.S. gallon = 3.785 liters = 0.833 imperial gallons
Frequently Asked Questions
What tank shapes does this calculator support?
The calculator supports horizontal and vertical cylinders, rectangles, horizontal and vertical ovals, and horizontal and vertical capsules. Each shape uses the exact geometric formulas for accurate volume calculations.
How do I calculate the fill volume of a partially filled tank?
Enter the fill depth in the Fill Depth field. The calculator uses the appropriate geometric formula for each tank shape to calculate the volume of liquid based on the fill height. For horizontal tanks, this uses the circular segment area method.
What units can I use for measurements?
You can enter dimensions in feet, inches, yards, millimeters, centimeters, or meters. The results are displayed in U.S. gallons, U.S. quarts, imperial gallons, liters, cubic meters, and cubic feet.
Are the calculations accurate for real-world tanks?
The calculations use exact geometric formulas for perfect solid shapes. Real tanks may have slightly different internal volumes due to manufacturing tolerances, internal fittings, or rounded corners not accounted for in these calculations.
What is the difference between a horizontal oval and a vertical oval tank?
A horizontal oval tank has the oval cross-section oriented horizontally (wider than tall), while a vertical oval tank has the oval cross-section oriented vertically (taller than wide). Each orientation affects how the fill volume is calculated.
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