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Square kilometers to Square meters (km² to m²)
Convert square kilometers to square meters: 1 km² = 1000000 m². Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 km² = 1000000 m²
square meters = square kilometers × 1000000 — reverse: square kilometers = square meters × 0.000001
The factor is derived from the SI definitions of both units (base unit: m2) 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 km² = 5000000 m²
- 12.5 km² = 12500000 m²
- 100 km² = 100000000 m²
Square kilometers to square meters conversion table
| Square kilometers (km²) | Square meters (m²) |
|---|---|
| 1 | 1000000 |
| 2 | 2000000 |
| 3 | 3000000 |
| 4 | 4000000 |
| 5 | 5000000 |
| 6 | 6000000 |
| 7 | 7000000 |
| 8 | 8000000 |
| 9 | 9000000 |
| 10 | 10000000 |
| 15 | 15000000 |
| 20 | 20000000 |
| 25 | 25000000 |
| 30 | 30000000 |
| 40 | 40000000 |
| 50 | 50000000 |
| 75 | 75000000 |
| 100 | 100000000 |
| 200 | 200000000 |
| 250 | 250000000 |
| 500 | 500000000 |
| 1000 | 1000000000 |
FAQ
How many square meters are in one square kilometer?
1 km² = 1000000 m². 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 square kilometers to square meters?
Multiply the value in square kilometers by 1000000: square meters = square kilometers × 1000000. For example, 5 km² = 5000000 m².
How do I convert square meters back to square kilometers?
Multiply by the inverse factor 0.000001 (square kilometers = square meters × 0.000001), or use the square meters-to-square kilometers page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=km2&to_unit=m2 - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"km2","to_unit":"m2"} - Markdown: https://tttkmbb.com/conversion/square-km-to-square-meters.md · JSON: https://tttkmbb.com/conversion/square-km-to-square-meters.json (add
?value=for a result) · Units: /api/v1/units?quantity=area - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.