Square Meters to Square Kilometers (m² to km²)

1 square meter equals 0.000001 square kilometers — multiply the number of square meters by 1.000000e-6 (divide by 1,000,000) to convert. So 100 m² is 0.0001 km² and 1,000,000 m² is exactly 1 km².

The formula

To convert square meters to square kilometers, divide by one million:

square kilometers = square meters × 0.000001

For example, 50,000 m² × 0.000001 = 0.05 km². Because a kilometer is 1,000 meters, a square kilometer holds 1,000,000 m². To reverse it, multiply km² by 1,000,000.

Conversion table

How to convert online

Live and instant:

1. Type the number of square meters into the first box.
2. Read the square-kilometer value instantly in the second box.
3. Or enter a square-kilometer value to convert back — it works both ways.

Use the Square Meter to Square Kilometer Converter — free and instant in your browser.

Where this conversion is used

Both units are metric, so this is a scale change used in mapping, GIS, urban planning and land surveying — turning site-level square-meter measurements into the square kilometers used for regional and city-wide figures.

FAQ

How many square kilometers are in a square meter?

One square meter equals 0.000001 km². Multiply m² by 1.000000e-6 — 1,000,000 m² = 1 km².

What is the formula to convert square meters to square kilometers?

Square kilometers = m² × 0.000001, i.e. divide square meters by 1,000,000.

How do I convert square kilometers back to square meters?

Multiply km² by 1,000,000. So 0.05 km² = 50,000 m².

Is the conversion exact?

Yes — the factor 1/1,000,000 is definitional, so there is no rounding error.

Related converters

• Square Kilometer to Square Meter Converter
• Square Meter to Square Foot Converter
• Square Meter to Hectare Converter
• Square Meter to Acre Converter

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