Choose the Unit Group (27) of the units ( 1496) you want to convert:
Create your own Personalized Unit Converter, in 2 simple steps !
Our Converter not only shows the conversion to one single unit. But to all other units. And it also gives you the possibility to create your own Personalized Converter. Which only shows you the conversions you are interested in and of different Groups Simultaneously! Have a look at our simple example.
How to create your own Online Converter in two simple STEPS!
:
  • Step 1.) Choose the Groups you need (as many as you need or like.).
  • Step 2.) Choose from each Group the actual Units you are interested in.
DONE ! Make the Conversions you want.

Here is a simple example used by for instance an International Realestate Agent. Who always struggle with the conversions between the Metric System (square meters, hectares, kilometers etc.) and the American System (square foot, acres, inches, miles, yards etc.)

They choose as MEASUREMENT GROUPS:
  • Common Area Units
  • And within this group:

    1. Acres
    2. Hectare
    3. Square foot
    4. Square inch
    5. Square Meter
  • Common Length Units
  • And within this group:

    1. Feet
    2. Inch
    3. Kilometer
    4. Meter
    5. Mile
    6. Yard
And the number of decimals. In this case 2 decimals.
Have a look and play with it! GO!
Create your own Conversion Widget, in 2 simple steps !

Metric Moon

January 8, 2007: If you think in pounds and miles instead of kilograms and kilometers, you're in the minority. Only the United States, Liberia, and Burma still primarily use English units. The rest of the world is metric. And now the Moon will be metric too.

With metric system worldwide, no conversions will be necesary.
Red are the countries, where the metric system is not in place.

NASA has decided to use metric units for all operations on the lunar surface when it returns to the Moon. The Vision for Space Exploration calls for returning astronauts to the Moon by 2020. And eventually setting up a manned lunar outpost.

The decision is a victory not only for the metric system itself. Which by this decision increases its land area in the solar system by 27%. But also for the spirit of international cooperation in exploring the Moon. The decision arose from a series of meetings. Tthat brought together representatives from NASA and 13 other space agencies. To discuss ways to cooperate and coordinate their lunar exploration programs. Standardizing on the metric system was an obvious step in the right direction. For more. Metric Moon

Metric System or S.I.
Système international d'unités.

With thanks to Ken Alder, the author the excellent book
"The Measure of Everything", from which we used a part of the prologue, to capture your interest regarding: How the Metric System came to be!.

In June 1792-in the dying days of the French monarchy, as the world began to revolve around a new promise of Revolutionary. equality-two astronomers set out in opposite directions on an extraordinary quest. The erudite and cosmopolitan Jean-Baptiste- Joseph Delambre made his way north from Paris, while the cautious and scrupulous Pierre François Andre Mechain made his way south. Each man left the capital in a customized carriage stocked with the most advanced scientific instruments of the day and accompanied by a skilled assistant. Their mission was to measure the world, or at least that piece of the meridian arc which ran from Dunkerque through Paris to Barcelona. Their hope was that all the world's peoples would hence- forth use the globe as their common standard of measure. Their task was to establish this new measure-"the meter"-as one ten-millionth of the distance from the North Pole to the equator.
The meter would be eternal because it had been taken from the earth, which was itself eternal. And the meter would belong equally to all the people of the world, just as the earth belonged equally to them all. In the words of their Revolutionary colleague Condorcet "the founder of mathematical social science and history's great optimist" the metric system was to be: "for all people, for all time."