Millimeters to Centimeters Converter
Convert Millimeters (mm) to Centimeters (cm) instantly, or use the conversion table below to look up common values.
Millimeters to Centimeters conversion table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 4 | 0.4 |
| 5 | 0.5 |
| 10 | 1 |
| 25 | 2.5 |
| 50 | 5 |
| 100 | 10 |
How to convert Millimeters to Centimeters
1 mm equals 0.1 cm. Use the converter above for any value, or read the table for common conversions.
cm = mm × 0.1 · mm = cm × 10Multiply a millimeters figure by 0.1 to get centimeters, or divide it by 10 to go the other way.
Worked examples
- 1 mm= 0.1 cm
- 5 mm= 0.5 cm
- 10 mm= 1 cm
- 25 mm= 2.5 cm
- 100 mm= 10 cm
What these units are
Millimeters (mm). A millimeter is one thousandth of a meter. It is the unit for precision work — engineering tolerances, rainfall, wire gauges and the thickness of paper or sheet metal.
Centimeters (cm). A centimeter is one hundredth of a meter. It is the everyday metric unit for short distances: body measurements, clothing sizes, furniture and school rulers.
Metric-to-metric conversions are exact. Imperial figures are exact by definition but are rounded for display, so a value converted back and forth can differ in the final digit.
Converting Millimeters to Centimeters in practice
Reading the result in centimeters
The centimeter is exactly one hundredth of a meter, written 0.01 m, and it is the unit most metric rulers and tape measures are marked in, with ten millimeters to one centimeter.
It appears on clothing labels, school rulers, rainfall reports and body measurements, and in medicine for wound sizes. A person's height is commonly recorded in centimeters on metric forms.
The factor between centimeters and inches is exact: one inch equals 2.54 centimeters. Results on this site are shown with up to six decimal places, so a value converted out and back can end one digit away.
The usual error is reading a millimeter figure as centimeters, which overstates a length tenfold, or treating square centimeters as if they scaled with centimeters rather than with their square.
Centimeters, millimeters and meters divide the same scale: millimeters suit engineering tolerances, centimeters suit height and clothing, and meters suit rooms and buildings. Choosing the wrong unit misplaces the decimal point by ten or a hundred, so the label matters as much as the figure.
Checking a millimeters to centimeters conversion
Inside the metric units every length conversion is a shift of the decimal point, so millimeters to centimeters, meters to kilometers and the rest can be done by moving it. Which way, and how far, follows from the prefix alone.
Converting between metric and imperial is not a shift but a single exact multiplication, and the factor is the same one for that pair however large or small the value. The trap is mixing the two systems halfway, as when a distance is stated in meters and inches in the same sentence.
To check a length conversion, run it backwards, or convert through a familiar middle value such as a meter or a foot. The one thing to keep straight is pairs that differ by a thousand rather than by ten, since those are where a misplaced decimal point survives unnoticed.
Tanzania reference points
Real quantities, converted into the units on this page.
Uhuru Peak on Mount Kilimanjaro, the highest point in Africa
5,895 m = 5,895,000 mm = 589,500 cm
The datasheet also records Kilimanjaro as rising 4,877 m above the surrounding plains.
Source: UNEP-WCMC World Heritage datasheet — Kilimanjaro National Park · verified 2026-09-14
Marangu Gate, the main road entrance to Kilimanjaro National Park
1,830 m = 1,830,000 mm = 183,000 cm
Source: UNEP-WCMC World Heritage datasheet — Kilimanjaro National Park · verified 2026-09-14
How far Mount Kilimanjaro rises above the plains around it
4,877 m = 4,877,000 mm = 487,700 cm
Source: UNEP-WCMC World Heritage datasheet — Kilimanjaro National Park · verified 2026-09-14
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