One can just convert it themselves. For example 1 inch is 2.54cm, and one pound is .45kg. There are many conversion tables that can be found, both in print and online that give the full list of standard to metric conversions. Also many scientific calculators have the conversions built in so one just has to enter data and it converts it for them.
kilometers
That depends what you are measuring. There are lots of different units to measure different things: length, area, volume, weight, mass, force, etc.
The difference between centimeters and inches is that inches is in the standard measuring system and centimeters is part of the metric measuring system.
Convert the non-metric units to metric. It is a converter to the metric system, an international decimalised system of measurement, that is the common system of measuring units used by most of the world. Scroll down to related links and look at "Countries where the metric system is official are shown in green".
gram
There are several standard metric units, for measuring different things.There are several standard metric units, for measuring different things.There are several standard metric units, for measuring different things.There are several standard metric units, for measuring different things.
kilometers
That depends what you are measuring. There are lots of different units to measure different things: length, area, volume, weight, mass, force, etc.
It would be apple
A set of metric measuring spoons and jugs.
You would use Metric to Standard conversion.
as often as possible
The difference between centimeters and inches is that inches is in the standard measuring system and centimeters is part of the metric measuring system.
The standard unit for measuring time is a second so 8 minutes = 480 seconds.
To convert to metric teaspoons you divide by 5. 5ml/5 is 1 metric teaspoon
Feet is a standard unit of measurement mostly used in the American culture. The metric system will convert 6.2 feet into the 1.88976 meters which is the metric unit of measure.
There is no such thing as a USA standard. 4mm is the same length as 0.16 inches, approximately.