Joule

Key Stage 3

Meaning

A Joule is a unit for measuring energy

About Joules

Joules are the scientific unit for measuring energy.

A number of Joules is written with a capital J.

Unit Comparisons

Unit	In Joules
1 Calorie	4.2J
1 kilocalorie	4200J
1 kilowatt-hour	36,000,000J

Converting to Joules

Unit	To convert	Joules
1 Megajoule (1MJ)	Convert to Joules x1000,000.	1000,000J
1 kilojoule (1kJ)	Convert to Joules x1000.	1000J
1 Joule (1J)	Convert to Joules x1.	1J
1 millijoule 1(mJ)	Convert to metres /1000.	0.001J
1 microjoule 1(µJ)	Convert to Joules /1000,000.	0.000001J

Key Stage 4

Meaning

‘’’Joules’’’ (‘’’J’’’) are the SI Unit for energy.

About Joules

‘’Joules’’’ are shortened to an upper case ‘’’J’’’.

Converting to Joules

Unit	To convert	Joules
1 megajoules (1MJ)	Convert to joules x106	1x106J
1 kilojoules (1kJ)	Convert to joules x103	1x103J
1 Joule (1J)	Convert to joules x1	1J
1 millijoules 1(mJ)	Convert to joules x10-3	1x10-3J
1 microjoules 1(µJ)	Convert to joules x10-6	1x10-6J
1 nanojoules 1(nJ)	Convert to joules x10-9	1x10-9J