How do I convert mm² to m²?

Use the formula shown above or enter a value to see mm² converted to m² instantly.

What is the formula for mm² to m²?

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

When should I use mm² vs m²?

mm² 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 mm² to m²

Use the live converter below to translate between Square Millimeter (mm²) 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

mm² → m²

Square Millimeter

mm²

Square Meter

m²

Rounded result (4 decimals max)

Formula

1 mm² = 0 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 mm².

Back to main converter

mm² 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 Millimeter (mm²)	Square Meter (m²)
0.25 mm²	0 m²
0.5 mm²	0 m²
1 mm²	0 m²
2 mm²	0 m²
5 mm²	0 m²
10 mm²	0 m²
25 mm²	0 m²
100 mm²	0.0001 m²

m² back to mm²

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

Square Meter (m²)	Square Millimeter (mm²)
0.25 m²	250,000 mm²
0.5 m²	500,000 mm²
1 m²	1,000,000 mm²
2 m²	2,000,000 mm²
5 m²	5,000,000 mm²
10 m²	10,000,000 mm²
25 m²	25,000,000 mm²
100 m²	100,000,000 mm²