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Meters to Kilometers (m to km)

Convert meters to kilometers: 1 m = 0.001 km. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

Formula

1 m = 0.001 km

kilometers = meters × 0.001 — reverse: meters = kilometers × 1000

The factor is derived from the SI definitions of both units (base unit: m) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

5 m = 0.005 km
12.5 m = 0.0125 km
100 m = 0.1 km

Meters to kilometers conversion table

Meters (m)	Kilometers (km)
1	0.001
2	0.002
3	0.003
4	0.004
5	0.005
6	0.006
7	0.007
8	0.008
9	0.009
10	0.01
15	0.015
20	0.02
25	0.025
30	0.03
40	0.04
50	0.05
75	0.075
100	0.1
200	0.2
250	0.25
500	0.5
1000	1

FAQ

How many kilometers are in one meter?

1 m = 0.001 km. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert meters to kilometers?

Multiply the value in meters by 0.001: kilometers = meters × 0.001. For example, 5 m = 0.005 km.

How do I convert kilometers back to meters?

Multiply by the inverse factor 1000 (meters = kilometers × 1000), or use the kilometers-to-meters page.

Related conversions

Kilometers to meters (reverse)
Length Converter — all length units in one tool
Kilometers to Miles
Miles to Kilometers
Meters to Feet
Feet to Meters
Centimeters to Inches
Inches to Centimeters
Millimeters to Inches
Inches to Millimeters

Machine access

API: GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=m&to_unit=km
MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"m","to_unit":"km"}
Markdown: https://tttkmbb.com/conversion/meters-to-km.md · JSON: https://tttkmbb.com/conversion/meters-to-km.json (add ?value= for a result) · Units: /api/v1/units?quantity=length
OpenAPI operationId: convert_units. Freshness: static. Authentication: none.