Metric Length Converter
Convert millimeters, centimeters, meters and kilometers in either direction. Get exact decimal results, a conversion factor and a table for all supported units.
Use 1.5 or 1,5 for one and a half. Do not enter thousands separators. Results use a decimal point and commas for thousands.
Conversion table
| Unit | Value |
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About this tool
Convert between mm, cm, dm, m, dam, hm and km. Each adjacent metric step has a factor of ten. This converter preserves decimal values by moving the decimal point, without rounding the result. It converts length, not area or volume.
Frequently asked questions
Can I convert inches or feet?
Not in this version. It covers seven metric length units, from millimeters to kilometers.
How should I enter numbers?
Use a decimal point, for example 1.5. A decimal comma is also accepted, but thousands separators and scientific notation are not. Maximum 30 digits, including up to 18 decimal places.
Does it round small results?
No. Supported metric conversions are powers of ten and the full decimal result is shown. Displayed results use a decimal point and commas for thousands.