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# Converting units: metric distance

Learn to order 1 decameter, 13 meters, 15,000 millimeters, and 1900 centimeters from least to greatest.  Created by Sal Khan.

## Want to join the conversation?

• Isnt Milli Million?
• They are all wrong, milli means thousand. Like how a millimeter is 1/1000 of a liter. Sorry to say you wrong, but it’s true
• Has anyone actually heard "decameter" other than in a school discussion of metric units? My web browser's spell-checker doesn't even like the word "decameter."
• Perhaps it would work if you spell it as "dekameter". It is not much used because people tend to confure it was decimeter (which is used much more). In general we just talk about meters or kilometers. In case of areas (farmers in my country for example) talk about hectometers, but never dekameters. It is just a standard SI unit, you must learn it at school :)...
• what does metric mean in the title
• The word “metric” means measurement and describes a system of units based on powers of 10. The metric system uses prefixes on units to represent powers of 10. For example:

micro means 1/1,000,000;
milli means 1/1,000;
centi means 1/100;
deci means 1/10;
deka means 10;
hecto means 100;
kilo means 1,000; and
mega means 1,000,000.

So, for example, a milligram is 1/1,000 of a gram, and a hectometer is 100 meters.
• ​Is there anything smaller than milli?
• Yes! Some smaller prefixes include: Micro (0.000,001), nano (0.000,000,001), and pico (0.000,000,000,001). Commas are in the decimal to show every three didgets - like in non-decimals.
• whats a decameter
• A decameter is ten meters.

Similar to how a DECade is ten years.

It's all in the prefix of the word.
Dec = 10
Mil = 1000 - like millenium or 1000 years
• Is there a type of meter that compares to 1,000,000?
• this confusing can anyone help?
• how do you do a problem if you have a question like 100m= _mm
• The problem would be asking you to multiply. I have an annotation that helps me remember my metric units. King Henry Died Unexpectedly Drinking Chocolate Milk. Kilo, Hecto, Deca, Units, Deci, Centi, Milli. The m falls under units and the mm stands for Millimeters. Since millimeters are 1/1000 of a meter, you would multiply 100 by 1000.
I hope this helped!
(1 vote)
• I do not get it