1. Liters are a Unit of Volume Measurement

Liters measure **volume**, which indicates how much space is available inside the bag. Just like water is measured in liters, the empty space inside a bag is also measured in liters.

2. One Liter = 1,000 Cubic Centimeters (cc)

If we measure the space inside a bag as a cube, **1 liter equals 1,000 cc (cubic centimeters)** of volume.

3. Easy Size Comparison

Measuring bags in liters makes it easier to compare different sizes. For example:

• A **20-liter** bag is small and suitable for school or daily use.
• A **60-liter** bag is large, ideal for trekking or long travel.

4. How is Bag Capacity Measured?

To measure a bag’s capacity, it is completely filled, and its volume is calculated. This includes the **main compartments and pockets**.

5. Difference Between Weight and Capacity

Remember, **liters indicate bag capacity**, not its weight. The weight of a bag with the same capacity can vary based on the items stored inside.