Have you ever wondered how the volume of a backpack is determined? This question may seem simple, but in reality, determining a backpack's liter capacity is a true art! For example, you read in the description: the model's volume is X liters. But how was that determined? How can you practically measure the volume of any backpack? We'll discuss this.
Why know the liter capacity of a backpack or bag?
It would seem, why should parents and children think about the liter capacity of a backpack or other accessory? If only to satisfy their own curiosity and understand this topic. And it also directly affects how many books, notebooks, and other things can be taken to school.
The larger the accessory, the more it will hold, right? But does the "bigger is better" rule always apply? Not entirely. An overly large backpack can be uncomfortable. Moreover, the more free space it has, the more tempting it is to take "just in case" a few extra toys, lunches, or slimes that definitely won't be needed in math class.
• Knowing a backpack's liter capacity means understanding how much usable space it has for favorite items. How many sandwiches, toys, books, and other small things can be placed in it. This is a very important and informative characteristic of the model.
The ideal liter capacity for a school backpack is a balance between spaciousness and convenience
And although it seems simple, determining the exact volume is not as easy as it seems. The volume of a backpack can be measured in various ways — from classic geometry to practical experiments.
Geometric method: recalling school formulas
First, we can recall school geometry lessons. It turns out that the math teacher wasn't lying when she said it would be useful in life! We take a ruler, measure the height, width, and depth of the backpack, multiply these numbers together, and voila – we have the volume. But there's one "but." This method works perfectly only for vintage backpacks that have a clear parallelepiped shape (the same school satchels worn by students of the last millennium). But modern backpacks are true works of art with complex shapes. So the calculation result will be inaccurate.
Water experiment in the bathroom?
The most accurate method is water! We take the backpack, place a plastic bag inside, and start pouring water from a liter jar. Each jar adds another liter to the backpack's total volume. But it's better to do this in the bathroom, because... liquid tends to spill. And the bag may not always reliably protect the backpack from getting wet. So, let's not risk it.
Sand instead of water – an option for a beach vacation
You can try the same experiment, but with sand. Fill the main compartment of the backpack with sand, count the number of jars. It's simple! True, there's a huge drawback – you'll have to shake out the sand for years afterward, and that can be quite a quest. So let's not ruin the backpack. A backpack should be treated carefully: not to get it dirty or damaged.
Measuring volume using balls
And finally – a method that leaves no wet marks or stains: small balls! Small plastic balls fill all the cavities of the backpack, and based on their number, we can easily calculate the total volume. This method is not only accurate but also completely clean.
Which compartments are considered when determining the volume of a Kite backpack?
A backpack's liter capacity is determined based on the volume of its main compartment and voluminous front pockets. Small outer pockets are not included in the total liter capacity.
What about the side pockets?
Although they may look quite spacious for a water bottle or thermos, their volume is usually not added to the main figure. This is because their purpose is for quick access to items that don't necessarily need to be stored with the main contents. So, when choosing a backpack by liter capacity, it's worth considering that its actual space may be more capacious, as the stated volume includes external pockets as a bonus.
This is how the volume of backpacks, shopper bags, lunch bags, and other Kite accessories is measured.
So, choosing a method for measuring a backpack's liter capacity is quite an adventure! And, although good old geometric methods work, sometimes a modern approach and a bit of imagination can yield a more accurate and interesting result.
