# How Many Litres In A 25m Swimming Pool? [Facts!]

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Most people have some sort of fantasy about what a massive holiday would be like. Perhaps you’re imagining a tropical paradise with perfect beaches and crystal clear waters. Or maybe you’re picturing European cities such as London or Paris with their famous landmarks and bustling historic centres. No matter what you desire in your ideal holiday, it seems like everyone has a taste for some sort of escape. Designers of leisure resorts know that people come back year after year to enjoy their spectacular locations and all the luxuries offered by a resort lifestyle. What makes a luxury resort different is the way they ensure the every moment is tailored to fit the desires of their guests. That’s what makes a luxury resort tick!

The most common question when thinking about a luxury resort is, ‘How many litres of water are there in the pool?’ For the avoidance of doubt, let’s define a ‘litre’ first: It’s the distance between a liquid’s surface and the air’s surface divided by 2.21 – the ideal temperature at which water changes from a liquid to a gas. For example, a 20°C (68°F) pool will be 20/68 = 3.25 litres per 25m. You may also hear it called a ‘swimming pool’, ‘pool’, or ‘bath’. So, in the most general sense, a ‘litre’ is the amount of water in a swimming pool.

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## One Metre Is One Metre

In everyday life, we’re accustomed to referring to a metre as ‘one metre’. However, in the world of sports and recreation, a metre is defined as ‘one hundredth of a kilometre’, or ‘ten metres’. It’s the same definition that’s used in the Olympics. That’s why it can be difficult to answer the question, ‘How many metres are in a swimming pool?’. It isn’t that the answer is ‘one hundred’ – it’s that the answer is ‘ten’. A metre is a metre is a metre! Let’s try to keep things simple!

The answer will be the same whether you’re referring to a pool in the British Isles or one in Germany. A metre is a metre is a metre – in other words, it’s the same all over Europe! What’s more is that even the most modern pools still use metres rather than centimetres. Perhaps the most incredible example of how seriously countries around the world take their metres is Brazil. In that country, they use the metric system not just for distance, but for measurement of all sorts. For example, a litre is equal to one hundred millilitres, and a decagram is equal to one hundred thousand millilitres. Crazy, right?

## More Than One Metre

If you want to keep things simple, the answer is again, ‘it depends’. Most people will tell you that a 25m pool will hold at least 3500 litres. That’s because a metre isn’t a metre is a metre – it varies depending on the depth of the pool! So if you’re swimming at the surface, it will be longer. However, if you’re swimming at the deep end, it will be shorter. It’s the same with a 12ft pool, which will measure 12ft × 2.25m = 32.5m. In general, the deeper the pool, the shorter the metre.

## Fluid Is Fluid

In the same way that water changes from a liquid to a gas at a certain temperature, so too does a sports pool. The difference is that when you change the temperature of a gas, the volume changes too. As the temperature goes up, the volume will increase. The opposite will happen if the temperature is lowered. That’s why a hot-tubs or a pool heated by a solar heater will heat up the water faster than one filled with a usual heater. The heat will cause the water to expand and increase in volume. It’s important to note that this change in volume can be beneficial or harmful, depending on the situation. So while it’s great to increase your body’s temperature before a workout, it could also be dangerous if you do it during heatwaves.

If a gas is cooled, it becomes more dense and takes up less space. That’s why when you order a drink at a bar, the server will usually ask you if you want it ‘ice’ or ‘frozen’. Dense liquids, such as oil, will also show this as an effect. When a gas is cooled, it becomes less ‘fluffy’ and more like a wet, fluffy towel. It’s the same as the effect when you put your hand in front of a fan. The air will feel cool and refreshing, but it won’t be very pleasant if you get wet. When you’re in the water and start feeling cold, it means your body is trying to regulate its temperature. That process is called ‘sweating’ – your body is trying to get rid of excess heat. So, while you might find a pool’s water a little cool, it’s actually a good thing!

## Swimming Pools And Climate Change

One of the interesting things about a tropical climate is that, aside from the obvious appeal of its beautiful weather, you will usually find more or less the same temperature as the air. As a result, it’s easy for swimmers to get very wet. This is something that wouldn’t happen much in a cold climate. When it’s cold out and you want to go for a swim, you will usually need to gear yourself up with several layers to be able to swim comfortably. The same goes for the shower. After a hard day of skiing or walking, you will usually return home quite wet. The shower will warm you up quickly, but the temperature will also change the composition of the air. Wet air is less dense than dry air, so if you leave the shower unheated, you will feel less buoyant and will take longer to reach the surface. In very cold climates, this can be a safety issue, as you then have to wait for the water to freeze before you can get in. Even in the summer, the air feels quite heavy, resulting in an increase in the heart rate. If you want to stay alive, you will need to keep your body temperature as high as possible. This is why a sauna session before a workout is so beneficial. In the same way that a cold shower can be dangerous (if you don’t know how to swim), the same can be said about a cold sauna.

Thanks to global warming, this issue is becoming more relevant. As temperatures rise due to climate change, it can become more difficult to keep your body’s temperature stable. If you live in a region where it gets hot and steamy all year round, then you don’t really need to worry about keeping your body warm. However, if you live in a region where it gets extremely cold at night, then you should definitely start paying more attention to how you stay warm. This is why it’s important to take a regular hot shower – not just a cold one! – before a workout. The same goes for a sauna. The human body was not designed to be in the cold, and too many cold showers and saunas can cause health problems. In very extreme cases, it can even cause death! When it comes down to choosing a swimming pool, it is essential to bear in mind the region you will be visiting and how cold the climate is. This will help you choose the right pool for the right place. Even if you are a professional swimmer, the temperature of the water can sometimes be a concern. This is why it’s important to have a look at the area around the pool to see what type of clothing you should bring. Remember: the water temperature will always be the same as the air outside! You won’t get overheated even in a direct sunshine – so always remember to protect yourself from overheating by keeping your body’s temperature low. For this reason, a good rule of thumb is to stay out of the water if the air feels cold.