Square Kilometers to Square Meters
Convert square kilometers to square meters instantly. 1 km² = 1,000,000 m². Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert square kilometers to square meters
To convert square kilometers to square meters, multiply by 1,000,000. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
m² = km² × 1,000,000
Square Kilometers to Square Meters conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Square Kilometers | Square Meters |
|---|---|
| 1 km² | 1,000,000 m² |
| 2 km² | 2,000,000 m² |
| 3 km² | 3,000,000 m² |
| 5 km² | 5,000,000 m² |
| 10 km² | 10,000,000 m² |
| 20 km² | 20,000,000 m² |
| 25 km² | 25,000,000 m² |
| 50 km² | 50,000,000 m² |
| 100 km² | 100,000,000 m² |
| 500 km² | 500,000,000 m² |
| 1,000 km² | 1,000,000,000 m² |
What is a square kilometer?
One million square metres. Used for city, park and lake areas.
What is a square meter?
The SI unit of area and the standard for floor space outside the US.
The formula
m² = km² × 1,000,000
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Square Kilometers to Square Meters
- Type the number of square kilometers you want to convert.
- Read the result in square meters straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked square meters to square kilometers page.
Square Kilometers to Square Meters — frequently asked questions
How many square meters are in a square kilometer?
One square kilometer equals 1,000,000 m². m² = km² × 1,000,000
What is the formula to convert square kilometers to square meters?
The formula is m² = km² × 1,000,000. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert square meters back to square kilometers?
Divide instead of multiplying: one square meter is 1e-06 km². The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this square kilometers to square meters free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error