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Why should you want to know?

There are all sorts of reasons for wanting to convert **miles** to kilometres, but here are the commonest ones…

**Runners** 5k is a common distance for runners, and "How long is a 5k run" is a frequently asked question. Here is an approximate sufficient answer and a simple way to work it out.**Walkers and motorists**

Again, a close answer will be good enough for these types of reasons. A couch potato might want to know if a 5k walk is feasible, and while motorists are more likely to be dealing with larger numbers, the principles are the same.

**Students, school children, and others doing calculations**

For these purposes, a more accurate answer is required. When doing maths at school or college, or later, an approximate number of **miles** is not good enough.

How **many** **miles** is 5 kilometres?

For all practical purposes such as running, walking, or driving, 5k is 3 **miles**. In fact, the accurate answer to 6 decimal places is that 5k is 3.106856 **miles**. However, not **many** people will need to know it to that level of accuracy. We will now take a look at how you work out kilometre to mile conversions, at whatever level of accuracy you need.

How to calculate kilometre to **miles**

**Easy approximate methods**

The simplest way is to remember that 5 kilometres is approximately 3 **miles**. That way, you know that 10k is 6 **miles**, 15k is 9 **miles**, and so on. If you can manage your 3 and 5 times tables, you can work it out.

A slightly more accurate way, which you’ll need for numbers of kilometres other than 5, 10 etc, is to multiply by 5 and divide by 8 (multiply by five-eighths). So if you want to know how **many** **miles** are in 7k, you multiply by 5, which equals 35, then divide by eight, which gives between 4 and 5 **miles**.

**More accurate methods**

Remember that a kilometre is 0.6213712 **miles**, and multiply by that figure each time. But it is easier to use modern technology to get the answer. You can easily buy a metric conversion calculator, which will give you this type of conversion, and **many** more. Or the iPhone has an excellent conversion app which is how the author got the conversion quoted to 6 or 7 decimal places.

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