To convert centimeters to meters (cm to m), multiply by 0.01. 1 centimeter equals 0.01 m, about 1.7 times as much as a grain of rice.
| centimeters | meters |
|---|---|
| 1 centimeter | 0.01 m |
| 2 centimeters | 0.02 m |
| 5 centimeters | 0.05 m |
| 10 centimeters | 0.1 m |
| 25 centimeters | 0.25 m |
| 50 centimeters | 0.5 m |
| 100 centimeters | 1 m |
| 250 centimeters | 2.5 m |
| 500 centimeters | 5 m |
| 1000 centimeters | 10 m |
Definition: 1/100 of a meter - the "centi" prefix doing the same job it does in "century" or "cent."
History: Introduced alongside the meter itself during the French Revolution's metric overhaul, the centimeter was designed from the start to be a convenient, everyday-sized subdivision - a meter is often too big and a millimeter too small for describing things like a person's height or a book's thickness.
Current use: Height, everyday object sizes, and fabric measurements across most of the world; also the standard unit doctors use internationally for body measurements.
Definition: The base unit of length in the metric system - every other metric length (km, cm, mm) is just meters multiplied or divided by a power of ten.
History: Born out of the French Revolution's push to replace a chaotic patchwork of local, often royally-defined units with something rational and universal. In 1793, French scientists defined the meter as one ten-millionth of the distance from the North Pole to the Equator, measured along the meridian running through Paris - they actually sent surveyors out to physically measure the distance between Dunkirk and Barcelona to calculate it, a project that took years longer than planned. Today the meter is defined by something far more precise and impossible to argue with: the distance light travels in a tiny, fixed fraction of a second.
Current use: The foundation of virtually every length measurement outside the US - room dimensions, building heights, and race distances (measured in km) all build on it.
The factor is 0.0100000, which is derived rather than defined, so any decimal you see has been rounded somewhere.
No simple round multiplier is close enough to be useful, so this is one to look up rather than estimate. The exact factor is 0.0100000.
Going the other way, one meter is 100 cm, which is usually the easier direction to work in. Because the forward factor is small, watch the decimal place rather than the digits: a factor-of-ten slip is the common error, not a rounding one.
To anchor the scale: 100 centimeters is about 1 m.