You measure mass in kilograms (kg) and grams (g) depending on how heavy something is.
If you were baking a cake, you would use grams but when you buy the flour and sugar in the shops, they are sold in kilograms.
1000 g = 1 kg
How many grams are in 5.5 kg?
Answer: 5.5 x 1000 = 5500 g
Capacity (or ‘volume’) is measured in millilitres (ml) and litres (l).
Capacity is another measure that you see a lot in baking and cooking. You also see it on the side of drinks bottles and cans. A can of drink usually holds 330 ml but you can buy bigger bottles that are 2 litres.
1000 ml = 1 l
How many litres are in 245 ml?
Answer: 245 ÷ 1000 = 0.245 l
Metric length can be measured in millimetres, centimetres, metres and kilometres. Different lengths are used depending on how long the length you are measuring is.
Converting length isn’t as straightforward as mass or capacity since there are different conversions for each length.
10mm = 1cm
100cm = 1m
1000m = 1km
How many centimetres are there in 5.5 metres?
Answer: 5.5 x 100 = 550 cm