ConvBolt — Unit ConverterMillimeters to Centimeters Converter
Converting millimeters to centimeters is a multiplication by a fixed factor: 1 mm = 0.1 cm. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one millimeter works out to 0.1 cm, the centimeter is the much smaller unit of the two: a figure given in centimeter always carries a smaller number than the same measurement in millimeter. A chart drawn in mm can hide that, so check which label the axis uses before you compare two readings.
DIY and home-improvement work is where this pair shows up most: you measure in millimeters but the hardware store or an imported product sheet quotes centimeters, so the conversion has to be right the first time.
The conversion factor used here is 0.1 cm per millimeter (1 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 mm a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 10 mm per cm, the exact reciprocal, so a round trip through both pages returns your original number.
Millimeters to Centimeters formula
Use this formula to convert any millimeter value to centimeters:
Worked example: 100 mm × 0.1 = 10 cm.
Millimeters to Centimeters conversion table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 0.5 mm | 0.05 cm |
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 20 mm | 2 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 500 mm | 50 cm |
| 1000 mm | 100 cm |
How to convert millimeters to centimeters
Multiply the millimeter value by 0.1 to get the equivalent in centimeters. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Centimeters to Millimeters converter instead of dividing by hand; both pages use the same source factors. For every other mm conversion in one place, see the mm conversion hub.
Frequently asked questions
How many centimeters are in 1 millimeter?
1 millimeter = 0.1 cm.
What is 100 millimeters in centimeters?
100 mm = 10 cm.
Is converting millimeters to centimeters the same as centimeters to millimeters?
No — the direction changes the multiplier. The reverse conversion (1 cm = 10 mm) is on the Centimeters to Millimeters page.
Related conversions
Try the ConvBolt Unit Converter for any other length unit, browse the Length conversions, or read our conversion guides.