Imperial

x

= Metric

inch (in)
foot
yard (yd)
mile (ml) 
square inch (in²)
square yard (yd²)
square mile (mi²)
acre (ac) 
ounce (oz)
pound (lb)
US ton (2,000lbs) 
UK ton (2,240 lbs)   
gallon (gal)
cubic feet (ft³)
cubic yard (yd³)  

2.54
30.48
0.91
1.61
6.45
0.84
2.60
0.40
28.35
0.45
0.91
1.02
3.79
0.028
0.76

centimetre (cm)
centimetre (cm)
metre (m)
kilometre (km)
square centimetre (cm²)
square metre (m²)
square kilometre (km²)
hectare (ha)
gram (g)
kilogram (kg)
metric ton (t)
metric ton (t)
litre (L)
cubic metre (m³)
cubic metre (m³)

Metric   

x 

= Imperial

centimetre (cm) 
metre (m)
metre (m)
kilometre (km)
square centimetre cm²)
square metre (m²)
square kilometre (km²) 
hectare (ha)
gram (g)
kilogram (kg)
metric ton (t)
metric ton (t)
litre (l)
cubic metre (m³)
cubic metre (m³)   

0.39
3.28
1.09
0.62
0.16
1.20
0.39
2.47
0.035
2.21
1.10
0.98
0.26
35.23
1.35

inch (in)
feet (ft)
yard (yd)
mile (mi)
square inch (in²)
square yard (yd²)
square mile (mi²)
acre (ac)
ounce (oz)
pound (lb)
US ton (2,000lbs)
UK ton (2,240 lbs)
gallon (gal)
cubic feet (ft³)
cubic yard (yd³)

Imperial

Long Measure

12 inches  
3 feet
5.5 yards  
40 rods 
8 furlongs 
3 miles 

=
= 
=  
= 
= 
= 

1 foot
1 yard
1 rod
1 furlong
1 statute mile
1 league

Square Measure

144 square inches 
9 square feet 
30.25 square yards
40 square rods 
4 roods 
640 acres

=
=
=
=
=
=

1 square foot
1 square yard
1 square rod
1 rood
1 acre
1 square mile

Metric

Metricsure

Linear Measure

10 millimetres
10 centimetres
10 decimetres
1,000 metres
10 metres
10 decametres
10 hectometres  

=
=
=
=
= 
=
= 

1 centimetre
1 decimetre
1 metre
1 kilometre
1 decametre
1 hectometre
1 kilometre

10 milligrams
10 centigrams
10 decigrams
10 grams
10 decagrams
10 hectograms
1,000 kilograms

Liquid Measure

10 millilitres
10 centilitres
10 decilitre 
10 litres
10 decalitres
10 hectolitres 

=
=
= 
=
=
= 

1 centilitre
1 decilitre
1 litre
1 decalitre
1 hectolitre
1 kilolitre

Power

1,000 microwatts  
1,000 milliwatts 
1,000 watts
1,000 kilowatts
1,000 megawatts 
1,000 gigawatts   

=
=
=
=
=  
= 

1 milliwatt
1 watt
1 kilowatt
1 megawatt
1 gigawatt
1 terawatt