# Metric fact sheet

*Metric units*

*Meter* is the unit for *linear* measurement.

- One meter is a little longer than one yard.
- One millimeter = .001 meter or one thousandth meter (diameter of a paper clip)
- One centimenter = .01 meter or one hundredth meter (width of a paper clip or little finger)
- One kilometer = 1000 meters (a bit more than half a mile)
- 1000 mm = 1 m
- 100 cm = 1 m
- 1000 m = 1 km

*Liter* is the unit for *volume*. One liter is a little more than a quart.

- milliliter is .001 liters or one thoundth liter: Five ml is about a teaspoon.

*Gram* is the unit for* mass*. One gram is about the weight of a paper clip.

- kilogram is 1000 grams. One kilogram is about the same as a can of peaches about 2.2 pounds.

Most used prefixes for metric units:

- milli = one thousandth (.001)(10
^{-3}) - centi = one hundredth (.01) (10
^{-2}) - kilo = one thousand times (1000)(10
^{3}) - More metric prefixes

*Some prefixes on a number line*:

## Metric prefixes

Prefix | Symbol | Power |
---|---|---|

Quecca | Q | 10^{30} |

Ronna | R | 10^{27} |

Yotta | Y | 10 |

Zetta | Z | 10^{21} |

Exa | E | 10^{18} |

Peta | P | 10^{15} |

Tera | T | 10^{12} |

Giga | G | 10^{9} |

Mega | M | 10^{6} |

kilo | k | 10^{3} |

milli | m | 10^{-3} |

micro | μ | 10^{-6} |

nano | n | 10 |

pico | p | 10 |

femto | f | 10^{-15} |

atto | a | 10^{-18} |

zepto | z | 10^{-21} |

yocto | y | 10^{-24} |

ronto | r | 10^{-27} |

quecto | q | 10^{-30} |

See also: History of measurement