How do I convert m² to km²?

Use the formula shown above or enter a value to see m² converted to km² instantly.

What is the formula for m² to km²?

The converter calculates km² by applying the category-specific conversion factor for Area.

When should I use m² vs km²?

m² and km² are both part of the Area category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Area Converter & Surface Reference

Convert m² to km²

Use the live converter below to translate between Square Meter (m²) and Square Kilometer (km²). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

m² → km²

Square Meter

m²

Square Kilometer

km²

Rounded result (4 decimals max)

Formula

1 m² = 0 km²

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from km² to m².

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m² to km² quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Square Meter (m²)	Square Kilometer (km²)
0.25 m²	0 km²
0.5 m²	0 km²
1 m²	0 km²
2 m²	0 km²
5 m²	0 km²
10 m²	0 km²
25 m²	0 km²
100 m²	0.0001 km²

km² back to m²

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Square Kilometer (km²)	Square Meter (m²)
0.25 km²	250,000 m²
0.5 km²	500,000 m²
1 km²	1,000,000 m²
2 km²	2,000,000 m²
5 km²	5,000,000 m²
10 km²	10,000,000 m²
25 km²	25,000,000 m²
100 km²	100,000,000 m²