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Volume & capacity

Just how much is 30 litres?

Containers

30 L

Scale
30 litres

The quantity is exact as entered.

30 LVolume
40 litre suitcase

A suitcase is a portable case for carrying clothes and belongings during travel.

40 LVolume
These are equal-volume cubes. Edge lengths grow with the cube root of capacity; the cubes do not depict container exteriors.

A little perspective

The capacity of a 40 litre suitcase is about 1.33 times 30 litres.

Measurements, assumptions & sources +

30 litres

Volume: 30 L; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

40 litre suitcase

Volume: 40 L; example.

Defined 40 litre capacity. Actual containers, servings and fills vary. Outer shape is not used to calculate capacity.

Defined examples — our methodology

The marked volume is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 30 litres with the volume of a 40 litre suitcase. The notes below explain how each value was chosen.

30 litres

30 L

Volume · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

40 litre suitcase

40 L

Volume · example

Defined 40 litre capacity. Actual containers, servings and fills vary. Outer shape is not used to calculate capacity.

Comparing
Volume ↔ Volume
Relative size
The capacity of a 40 litre suitcase is about 1.33 times 30 litres. The volume of a 40 litre suitcase is approximately 33.3% greater than 30 litres.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The volume of a 40 litre suitcase: This is an illustrative comparison value, not a claim that every example is the same.

Volume measures three-dimensional space; a container’s capacity is not its outside dimensions.

0.03 m³cubic metres
7.9252 US galUS gallons
6.5991 UK galUK gallons

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