Summary:- Over 1000 factors for Metric Conversion. Plus 30 detail pages for Btu, water, paper, density, etc.
Metric Conversion Tables
 Metric Conversion Tables    

For metric conversions go to a unit starting with -
a b c d e f g h i j k l m n o p q r s t u v w y

( like m for metre or l for liter or c for cfm or cubic ft/min)

Unit Conversion Tool - download here for your server, PC or laptop to use anwwhere, anytime, off line.

This is the format of the conversion factors on this site:-

These units multiplied by .....
...this factor will...
..convert to these units.
sq. rods

Task: How many sq.rods in 10 acres.
From the tables: 1 acre = 160 sq.rods, so
10 acres x 160 = 1600 sq.rods
When you want to reverse the conversion,
divide by the factor viz.
1600 sq.rods/160 = 10 acres

The scientific notation used in the factors column helps to reduce long numbers to a manageable width. E+01 means moving the decimal point one space to the right and E-01 means moving the decimal point one space to the left.
So 1.00E+01 is shorthand for 10, then 1.33E+00 stays at 1.33 and 1.33E-01 becomes 0.133. The format tends to be used when the figure gets longer so E+09 or E-09 cuts out a lot of noughts.

Impossible Conversions
Remember that you cannot create energy only convert it. Likewise, you will not find a conversion from pounds to metres - the basic units must remain the same - mass converted to mass, length converted to length, and so on.

You won't usually find a conversion from kilograms to grams - the prefix 'kilo' means '1,000' so a kilogram is in fact 1,000 grams in the same way as a kilometer is 1,000 metres [or about 1,000 yards in 'old money']. I have put a few in the table because visitors have asked for them. More examples can be found on the prefix table.

One handy metric link between units
Remember that 1 Litre [1000cc] of pure water weighs 1 kilogram.
Equally, 1 milliliter of pure water has a mass of 1 gram or 1mL = 1g.

The upper case L for liter is preferable as the lower case can be confused with the figure one, however it is common to see ml for milliliters on bottles.

If accuracy is critical beware of old versions of MS Excel which had problems rounding off numbers.

We have tried to be accurate with the data but cannot be held responsible for inaccuracies.
Go back to first principals and double check your calculations if the result is 'mission critical'.

Metrication is a great help but has also created anomalies; I have seen pressure gauges changed from a commonly used psi to kg/cm.sq., bar, pascal, kPa and atmos but will no doubt move to a popular metric standard in a few decades.

More information on the SI System (Le Système International d'Unités) base units and definitions.


Goto a unit starting with letter:-
a b c d e f g h i j k l m n o p q r s t u v w y



Related pages
" Home page
" Info on SI Units
" SI Unit Descriptions
" SI Derived Units
" SI Prefixes (mega, giga)
" Imperial/UK Units
" Scientific Notation
--(i.e. what is 1.00E+09)

Detail pages
" Feet to metres calculator
" Metres to feet calculator
British Thermal Units Btu
" Density of bulk materials
" Density of liquids
" Specific Gravity of water
" Density of metals
" Density of woods
" Kitchen metric
" Medical metric
" Parts per million - ppm
" Clothing metric
" Yarn metric
" Time
" cc to hp
" Paper & Envelopes
" Gross to Nett price
" Nett to Gross price
" Add on Commission
" Sheet metal swg - mm
" Wire & rod swg - awg
" Electrical wire swg - awg
" Steam tables (4 pages)
" Watts, amps, volts, ohms
" M Threads & spanners
" Self tapping screws
" M tap & pilot drill sizes

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