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Essential metric Conversions


Conversion Calculators: Provided for arriving at approximate results
* General disclaimer applies though data accurate

Summary table of conversion factors most often required
   x means 'multiply by' . . .
  
/ means 'divide by' . . .
  
# means it is an exact value

All other values given to an appropriate degree of accuracy.

To convert into Follow signs To Convert into Follow signs
acres hectares x 0.4047 kilograms ounces x 35.3
acres sq. kilometres / 247 kilograms pounds x 2.2046
acres sq. metres x 4047 kilograms tonnes / 1000 #
acres sq. miles / 640 # kilograms tons (UK/long) / 1016
barrels (oil) cu.metres / 6.29 kilograms tons (US/short) / 907
barrels (oil) gallons (UK) x 34.97 kilometres metres x 1000 #
barrels (oil) gallons (US) x 42 # kilometres miles x 0.6214
barrels (oil) litres x 159 litres cu.inches x 61.02
centimetres feet / 30.48 # litres gallons (UK) x 0.2200
centimetres inches / 2.54 # litres gallons (US) x 0.2642
centimetres metres / 100 # litres pints (UK) x 1.760
centimetres millimetres x 10 # litres pints (US liquid) x 2.113
cubic cm cubic inches x 0.06102 metres yards / 0.9144 #
cubic cm litres / 1000 # metres centimetres x 100 #
cubic cm millilitres x 1 # miles kilometres x 1.609
cubic feet cubic inches x 1728 # millimetres inches / 25.4 #
cubic feet cubic metres x 0.0283 ounces grams x 28.35
cubic feet cubic yards / 27 # pints (UK) litres x 0.5683
cubic feet gallons (UK) x 6.229 pints (UK) pints (US liquid) x 1.201
cubic feet gallons (US) x 7.481 pints (US liquid) litres x 0.4732
cubic feet litres x 28.32 pints (US liquid) pints (UK) x 0.8327
cubic inches cubic cm x 16.39 pounds kilograms x 0.4536
cubic inches litres x 0.01639 pounds ounces x 16 #
cubic metres cubic feet x 35.31      
      square cm sq. inches x 0.1550
feet centimetres x 30.48 # square feet sq. inches x 144 #
feet metres x 0.3048 # square feet sq. metres x 0.0929
feet yards / 3 # square inches square cm x 6.4516 #
fl.ounces (UK) fl.ounces (US) x 0.961 square inches square feet / 144 #
fl.ounces (UK) millilitres x 28.41 square km acres x 247
fl.ounces (US) fl.ounces (UK) x 1.041 square km hectares x 100 #
fl.ounces (US) millilitres x 29.57 square km square miles x 0.3861
gallons pints x 8 # square metres acres / 4047
gallons (UK) cubic feet x 0.1605 square metres hectares / 10 000 #
gallons (UK) gallons (US) x 1.2009 square metres square feet x 10.76
gallons (UK) litres x 4.54609 # square metres square yards x 1.196
gallons (US) cubic feet x 0.1337 square miles acres x 640 #
gallons (US) gallons (UK) x 0.8327 square miles hectares x 259
gallons (US) litres x 3.785 square miles square km x 2.590
grams kilograms / 1000 # square yards square metres / 1.196
grams ounces / 28.35 tonnes kilograms x 1000 #
hectares acres x 2.471 tonnes tons (UK/long) x 0.9842
hectares square km / 100 # tonnes tons (US/short) x 1.1023
hectares square metres x 10000 # tons (UK/long) kilograms x 1016
hectares square miles / 259 tons (UK/long) tonnes x 1.016
hectares square yards x 11 960 tons (US/short) kilograms x 907.2
inches centimetres x 2.54 # tons (US/short) tonnes x 0.9072
inches feet / 12 # yards metres x 0.9144 #

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Length

Area

Volume

Mass

Temperature

Feet & Inches

Angles

Pounds & Ounces

 

Units of Alcohol

 

Density

Pressure& Stress

Speed

Fuel
Consumption

Power

or ONE calculator just for Changing Prefixes

Energy
(Work)

Flow Rate
by Mass        by Volume

Force

Torque

Specific Energy
by Mass         by Volume
(Calorific Value)

Spread Rate
by Mass        by Volume
(including Rainfall)

Concentration

Line Density
(inc. Textiles)

Area Density

Acceleration

Viscosity
Dynamic        Kinematic

Specific Heat Capacity
by Mass        by Volume

Heat FluxDensity

Thermal
Conductivity

Thermal
Conductance

There is a Selection of Other Calculators also available