Convert cm to km
1 cm = 1e-5 km · 1 km = 100000 cm · Exact by definition
1 cm = 1e-5 km
The same value in other units
- millimetre
- 10 mm
- metre
- 0.01 m
- inch
- 0.393701 in
- foot
- 0.0328084 ft
- yard
- 0.0109361 yd
- mile
- 6.21371e-6 mi
- nautical mile
- 5.39957e-6 nmi
Settings
Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.
Convert a whole list
Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.
Length
cm to km: conversion table
| centimetre | kilometre |
|---|---|
| 1 cm | 1e-5 km |
| 2 cm | 2e-5 km |
| 3 cm | 3e-5 km |
| 5 cm | 5e-5 km |
| 10 cm | 0.0001 km |
| 20 cm | 0.0002 km |
| 25 cm | 0.00025 km |
| 50 cm | 0.0005 km |
| 100 cm | 0.001 km |
| 250 cm | 0.0025 km |
| 500 cm | 0.005 km |
| 1000 cm | 0.01 km |
| kilometre | centimetre |
|---|---|
| 1 km | 100000 cm |
| 2 km | 200000 cm |
| 3 km | 300000 cm |
| 5 km | 500000 cm |
| 10 km | 1000000 cm |
| 20 km | 2000000 cm |
| 25 km | 2500000 cm |
| 50 km | 5000000 cm |
| 100 km | 10000000 cm |
| 250 km | 25000000 cm |
| 500 km | 50000000 cm |
| 1000 km | 100000000 cm |
How the conversion works
km = cm × 1e-5
Both units are defined exactly, so the precision of the cm to km result depends only on the number of decimal places you choose.
METHOD AND SOURCES
Where the conversion factors come from
Results are calculated from the unit definitions stored in the converter, not copied from a lookup table. For exact units, every value in the table follows from the same factor shown in the formula above.
- BIPM — SI Brochure
The official definitions of the International System of Units (SI).
- NIST SP 811 — Conversion factors
Conversion-factor tables for SI and non-SI units.
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