Result
This page has no server side at all. The table you paste is parsed by JavaScript inside your own browser, the chart is drawn on a canvas element on your machine, and the export file is assembled locally. Nothing is uploaded, stored or written to any log. You can disconnect from the network after the page has loaded and everything will still work — which is the simplest way to verify the claim yourself.
Facts and limits of this method
| Formula | Kilometers = millimeters × factor |
|---|---|
| 1 millimeter | 0.000001 kilometers |
| 1 kilometer | 1000000 millimeters |
| Rounding | Adjustable from 0 to 6 decimal places |
When it misleads you
- The ratio between millimeters and kilometers is an exactly defined constant, not a measured approximation, so the converter doesn't accumulate error regardless of the size of the entered value.
- At "0 — whole number" precision, the fractional part of the result is dropped by standard rounding rules, not truncation.
- The input accepts both a period and a comma as a decimal separator, but doesn't understand thousands-grouping separators — enter the number without them.
- Negative values are handled correctly (for example, for elevation differences), but a "negative distance" may or may not make physical sense depending on the context of your task.
How it is calculated
The entered value in millimeters is multiplied by the conversion factor into kilometers — this gives the result.
The result is rounded to the chosen number of decimal places using standard mathematical rounding.
The "1 kilometer = …" row shows the reverse ratio — one divided by the original factor — so you can quickly check which direction the conversion runs.
The calculation updates instantly on every change to the input field or precision, with no separate button.
Questions and answers
How do I convert millimeters to kilometers?
Enter a value in the field — the converter instantly recalculates it into kilometers using a fixed factor.
Can I enter fractional values?
Yes, the converter accepts decimal values with either a period or a comma as the separator.
How do I change the result's precision?
Pick the number of decimal places you want in the "Precision" dropdown.
Is my data sent anywhere?
No, the whole calculation runs in your browser.