No space between the number and the measure except when referencing computer memory. Use figures even if it's below 10 – don't spell the number out. When referencing temperature, write out the unit of measure in full rather than using abbreviations. Standard abbreviations include:
area
hectare (ha)
square centimetre (cm2)
square metre (m2)
cubic centimetre (cm3)
cubic metre (m3)
- Together the team hoped to remove predators from over 31,000ha around Dunedin.
computer memory
kilobyte (KB)
megabyte (MB)
gigabyte (GB)
terabyte (TB)
- The new computer had just 40 GB of memory.
length/distance/speed
millimetre (mm)
centimetre (cm)
metre (m)
kilometre (km)
kilometres per hour (kph)
- The average hand span is about 20cm.
- The driver averaged 80kph between Dunedin and Christchurch.
power
watt (W)
kilowatt (kW)
megawatts (MW)
gigawatts (GW)
megawatt/hours (MWh)
gigawatt/hours (GWh)
- The highest average heating potential in the house was only 0.52kW.
temperature
Celsius (C)
Fahrenheit (F)
- The predicted rise in temperature was two or three degrees Celsius.
volume/capacity
millilitre (ml)
litre (l)
- The 750ml drink bottles were popular souvenirs with visitors.
weight/mass
gram (g)
kilogram (kg)
pound (lb)
ounce (oz)
tonne (t)
- The recipe called for just 80g of flour.