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Calculator

Container Volume Calculator

For real projects and hands-on learning.

Container Details

Choose a shape

Examples: storage bins, aquariums, coolers, boxes

Measure and record

Measure inside

LengthLongest inside side

WidthShortest inside side

HeightBottom to fill line

Keep all measurements in the same unit.

Record your measurements

Length
_____
Width
_____
Height or depth
_____
Dimension unit
_____
Use the same unit for every dimension you enter.
Optional rectangular tank settings
Optional. Leave blank if wall thickness should not be subtracted.
Conversions
How is this calculated?

Rectangular prism: volume = length x width x height.

The calculator changes the formula when you select a different shape.

Explain My Calculation

The calculator converts your dimensions to a shared base unit, finds the container volume for the selected shape, then converts the result into gallons, liters, milliliters, and cubic units. For learning activities, compare this result with your prediction, hand calculation, and real-world test.

Assumptions and disclaimer
  • Results are estimates for educational and planning purposes.
  • Horizontal cylinder results assume the cylinder is full.
  • For tapered buckets, use top diameter, bottom diameter, and height.
  • Rectangular material thickness follows the previous calculator behavior by subtracting twice the thickness from length and width.
  • This calculator does not replace advice from specialists in tank design, construction, engineering, or installation.