172cm is between 5'7" and 5'8".

**How Many Centimetres In One Foot?**

30.8cm is equal to one foot. To make it easy to remember, just think that a foot is as long as a ruler (most are 30cm)!

**The Metric System**The metric system is a decimal measurement system, which means that it works in tens, hundreds and thousands, rather than the seemingly random measurements of the imperial system (which has 14lbs in 1 stone, for example). The metric system includes:

**Length:**Metres (m) and centimetres (cm)**Weight:**Kilograms (kg) and grams (g)**Volume:**Litres (L) and centilitres (cl)

If you're used to working with the imperial system, it can be hard to get your head aroundâ€”I'm fine with most of them, but for some reason, I still get confused sometimes when I'm buying milk!

The imperial system uses the following measurements, and was popular before the metric system came into use.**Length:**Foot (') and inches (")**Weight:**Stone (st), pounds (lbs) and ounces (oz)**Volume:**Pint (pt)