How do I convert km² to m²?

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

What is the formula for km² to m²?

The converter calculates m² by applying the category-specific conversion factor for Area.

When should I use km² vs m²?

km² and m² 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 km² to m²

Use the live converter below to translate between Square Kilometer (km²) and Square Meter (m²). 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

km² → m²

Square Kilometer

km²

Square Meter

1,000,000

m²

Rounded result (4 decimals max)

Formula

1 km² = 1,000,000 m²

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 m² to km².

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km² to m² 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 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