Measurement is as old
as history. There are 3 systems of measurement: the English, the Metric and the System
International D'unites (or SI). When America separated from England, the colonies retained
the English system - at about the same time the metric system was developed in France.
This metric system was later modified to develop the SI system. Here we have some
conversion calculators for weight, volume, length and pressure.
This is how these
work: just type a number in the field you know, and press the calculate button. It
will convert the units for the rest of the boxes. Note that the units are converted first
to the first box of each table, and then converted to the respective unit. This double
conversion is why if you put in 1 gal, you will not get exactly 8 pints.
