Convert square millimeter to acre

Units of area describe the size of a surface. It is often used in geometrics, real estate, physics and many other applications.

Starting unit

• metric units
  • square kilometer (km²)
  • square hectometer (hm²)
  • square decameter (dam²)
  • square meter (m²)
  • square decimeter (dm²)
  • square centimeter (cm²)
  • square millimeter (mm²)
• ares and derivates
  • hectare (ha)
  • are (a)
  • centiare (ca)
• imperial units
  • square mile (sq mi)
  • acre (ac)
  • rood (ro)
  • square yard (sq yd)
  • square foot (sq ft)
  • square inch (sq in)
• modern Chinese units
  • lí (lí)
  • fen (fen)
  • mu (mu)
  • shí (shí)
  • qing (qing)

Destination unit

• metric units
  • square kilometer (km²)
  • square hectometer (hm²)
  • square decameter (dam²)
  • square meter (m²)
  • square decimeter (dm²)
  • square centimeter (cm²)
  • square millimeter (mm²)
• ares and derivates
  • hectare (ha)
  • are (a)
  • centiare (ca)
• imperial units
  • square mile (sq mi)
  • acre (ac)
  • rood (ro)
  • square yard (sq yd)
  • square foot (sq ft)
  • square inch (sq in)
• modern Chinese units
  • lí (lí)
  • fen (fen)
  • mu (mu)
  • shí (shí)
  • qing (qing)