mm² - Square Millimeter. Conversion Chart

This conversion page features historical units (ancient, medieval, etc.) that are mostly no longer in use. If you are looking for units of area that are used today, including many national units of various countries, please switch to our main area conversion page.
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This converter is very easy. Really.

1This is a conversion chart for square millimeter (Metric). To switch the unit simply find the one you want on the page and click it.
You can also go to the universal conversion page.
2Enter the value you want to convert (square millimeter). Then click the Convert Me button.
Your value gets instantly converted to all other units on the page.
3Now find the unit you want and get the conversion result next to it. It's your answer.

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  1. Enter the value of your unit (square millimeter).
  2. Touch "Convert Me" button.
  3. Get instant resuls.
Your value (square millimeter, mm²):
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Metric

We only include several basic units here for you to convert historical units to contemporary ones. A more comprehensive list of metric units is available on the main area conversion page.
Units: square kilometer (km²)  / hectare  / square meter (m²)  / square centimeter (cm²)  /
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British (Imperial) And U.S. System

We only include several basic units here for you to convert historical units to contemporary ones. A more comprehensive list of British and U.S. units is available on the main area conversion page.
Units: square mile  / acre  / square yard (yd²)  / square foot (ft²)  / square inch (in²)
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Ancient Greek

Units: plethron (πλέθρον)  / aroura (ἄρουρα)  / hektos (ἕκτος)  / hēmiektos (ἡμίεκτος)  / dodecaorgion (δωδεκάωργον)  / decaorgion (δεκάωργον)  / akaina (ἄκαινα)  / hexapodēs or orgya (ἑξαπόδης, ὀργυιά)  / bema or diploum (βῆμα, ἀπλοῦν)  / pous (πούς), square foot
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Ancient Roman

Units: salt  / century  / geredium  / uger  / square akt  / klima  / square akt (small)  / square decimpeda  / square ped (ordinary)  / square ped (legal)
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Old French

There were many local variations; the following are Quebec and Paris definitions
Units: arpent  / royal square perche  / square toise  / square pied  / square pouce
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Old Spanish

These units are occasionally used today in some Latin America countries, as well as in southern U.S. states, e.g. in Texas.
Units: league (square)  / labor  / caballería  / yugada  / fanegada  / aranzada  / cuerda of Puerto Rico  / celemin  / cuartillo  / estadal cuadrado (square estadal)  / vara cuadrada (square vara)  / pie cuadrado (square pie)
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Old Portuguese

These units were used in Portugal, Brazil and other countries of the Portuguese Empire until the adoption of the metric system in 19th century.
Units: braça quadrada (square braça)  / vara quadrada (square vara)  / palmo quadrado (square palmo)  / polegada quadrada (square polegada)
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Old Russian

Units: desyatina (state)  / desyatina (farmery)  / square verst  / square arshin  / square foot

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