Convert square meters to square km
1 m² = 1e-6 km² · 1 km² = 1000000 m² · Exact by definition
1 m² = 1e-6 km²
The same value in other units
- square centimetre
- 10000 cm²
- hectare
- 0.0001 ha
- square foot
- 10.7639 ft²
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.
Area
square meters to square km: conversion table
| square metre | square kilometre |
|---|---|
| 1 m² | 1e-6 km² |
| 2 m² | 2e-6 km² |
| 3 m² | 3e-6 km² |
| 5 m² | 5e-6 km² |
| 10 m² | 1e-5 km² |
| 20 m² | 2e-5 km² |
| 25 m² | 2.5e-5 km² |
| 50 m² | 5e-5 km² |
| 100 m² | 0.0001 km² |
| 250 m² | 0.00025 km² |
| 500 m² | 0.0005 km² |
| 1000 m² | 0.001 km² |
| square kilometre | square metre |
|---|---|
| 1 km² | 1000000 m² |
| 2 km² | 2000000 m² |
| 3 km² | 3000000 m² |
| 5 km² | 5000000 m² |
| 10 km² | 10000000 m² |
| 20 km² | 20000000 m² |
| 25 km² | 25000000 m² |
| 50 km² | 50000000 m² |
| 100 km² | 100000000 m² |
| 250 km² | 250000000 m² |
| 500 km² | 500000000 m² |
| 1000 km² | 1000000000 m² |
How the conversion works
km² = m² × 1e-6
Both units are defined exactly, so the precision of the square meters to square 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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