Shape
Volume calculator
Tank Volume Calculator
Enter tank dimensions and calculate full tank volume with liquid unit conversions.
Calculating
Unit converter
Cubic volume unit converter
1 m³35.31 ft³
ft³35.31 ft³
yd³1.31 yd³
liters1,000 liters
US gal264.17 US gal
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Open a focused calculator when the main keyword changes.
How to use
How to calculate volume for your project
Switch between these options to match the way you are using the calculator right now.
Enter one shape and read the live total
- Choose the shape that matches the object you are measuring.
- Enter the required dimensions and confirm the input unit.
- Use the result panel to read cubic meters, cubic feet, liters, or gallons.
Start with the full tank shape and its outside capacity dimensions.
Guide
Tank volume calculator guide
Use this tank volume calculator when a tank or vessel needs a full-volume estimate from its shape and dimensions.
Tank volume formula
Tank volume depends on the tank shape. A rectangular tank uses length x width x height, while a cylindrical tank uses pi x radius squared x length or height.
Example tank volume calculation
A rectangular tank is 1.2 m long, 0.8 m wide, and 0.6 m high.
1.2 x 0.8 x 0.6 = 0.576
The full tank volume is 0.576 m3, or about 576 liters.
Unit notes
- 1 m3 equals 1000 liters.
- Liquid capacity is often shown in liters, US gallons, or UK gallons.
- This page estimates full tank volume, not partial fill level.
Best uses
- Water tanks
- Rectangular containers
- Cylindrical tanks
- Bins and vessels
Common mistakes
- Using diameter as radius in a cylinder formula.
- Measuring outside dimensions when inside capacity is needed.
- Assuming a partial fill result when the calculation is full capacity.
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How do I calculate tank volume?
Choose the tank shape, enter the required dimensions, and convert the resulting volume into liquid units if needed.
How many liters are in one cubic meter?
One cubic meter equals 1000 liters.
Can this tank volume calculator handle cylinders?
Yes. Choose a cylindrical tank shape and enter the required dimensions.
Does this calculate partial tank fill?
No. This calculator estimates full tank volume. Partial fill calculations need fill height or level data.
Should I use inside or outside tank dimensions?
Use inside dimensions when you need usable capacity. Outside dimensions may overstate the actual tank volume.
This calculator provides estimates based on the dimensions and assumptions you enter. For engineering, structural, freight, or purchasing decisions, verify the result with a qualified professional or supplier.