# Metric System Length Conversion Chart 1/1
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Metric conversion chart
Most of the world uses the metric decimal system which is based on ten.
Length
mm millimetres
cm centimetres
mmetres
km kilometres
1cm = 10mm 1m = 100cm
1km = 1000m
Area
mm
2
square millimetres
cm
2
square centimetres
m
2
square metres
km
2
square kilometres
ha hectares
1ha = 10,000 square metres
100mm
2
= 1cm
2
100ha = 1km
2
Volume and Capacity
mL millilitres
LLitres
cm
3
cubic centimetres
m
3
cubic metres
1mL = 1cm
3
(water)
1 cup = 250mL (in Australia)
1L = 1000mL
1000L = 1 kilolitre or 1m
3
Mass
ggrams
kg kilograms
1kg = 1000g 1 tonne = 1000kg
Units smaller than a metre have
Latin pre xes:
Deci – means one tenth (decimetre)
Centi – means one hundredth (centimetre)
Milli means one thousandth (millimetre)
These pre xes help us to understand measurement facts and how to convert
from one unit to another.
Units larger than a metre have
Greek pre xes:
Kilo – means 1,000; a kilometre is
1,000 metres. 1 / 1