There are a number of units that can be used to describe capacity. We are going to focus on the most common of these which is the metric measurement * Litre*.

All of the units you will have heard of that have the word Litre in them are based around the base unit litre with other words tacked on to describe their relationships.

**Kilo**litre - Kilo means 1000 so **1kl = 1000l ** (This is rarely used)

**Centi**litre - Centi means 100 so **1l = 100cl**

**Milli**litre - Milli means 1000 so **1l = 1000ml**

**Deci**litre - Deci means 10 so **1l = 10dl**

**How to convert.**

**Step 1:** Decide on your conversion factor (i.e. l to ml is a conversion of 1000)

**Step 2: **Either multiply or divide by this number to get your converted numbers,

**Example 1: Convert 45 L to centilitres.**

**Step 1:** Decide on your conversion factor.

1L = 100CL so our conversion factor is 100

**Step 2**: Multiply or Divide,

You need to think about this a bit. The way I look at this is that a centilitres are smaller than litres, so there will be more of them overall.

As there is less of them, we need to multiply.

45 x 100 = 4500 cl

**Example 2: Convert 750 ml to Litres.**

**Step 1:** Decide on your conversion factor.

1000mL = 1 L so our conversion factor is 1000

**Step 2**: Multiply or Divide,

You need to think about this a bit. The way I look at this is that a Litre is bigger than a cL, so there will be less of them overall.

As there is more of them, we need to divide

750 ÷ 1000 = 0.75 L