Square millimeters (mm²)
The square millimeter is one millionth of a square meter.
Convert square millimeters to any area unit
1 square millimeter = 0.000001 square meters
Quick facts
- Unit
- Square millimeter (plural: square millimeters)
- Symbol
- mm²
- Measures
- Area
- System
- Metric
- Equals
- 0.000001 square meters
- Definition
- The area of a square with 1 mm sides.
- Also written
- square millimetre, sq mm, mm2
1 square millimeter in other units
| Square meters | 0.000001 m² |
| Square feet | 0.00001076391 ft² |
| Acres | 2.4710538 × 10-10 ac |
| Hectares | 1 × 10-10 ha |
| Square kilometers | 1 × 10-12 km² |
| Square miles | 3.8610216 × 10-13 mi² |
| Square centimeters | 0.01 cm² |
| Square yards | 0.00000119599 yd² |
What is a square millimeter?
The square millimeter is one millionth of a square meter. It is the standard unit for the cross-section of electrical cables in metric countries (1.5 mm² and 2.5 mm² house wiring) and for image sensor sizes.
Where the square millimeter sits among area units
The square millimeter is number 10 of 112 on our scale of area units, ordered from smallest to largest.
Square millimeters in real life
- Household lighting circuits in Europe use 1.5 mm² cable
- A full-frame camera sensor is 864 mm² (36 × 24 mm)
Top square millimeter conversions
- Square millimeters to square meters
- Square millimeters to square feet
- Square millimeters to acres
- Square millimeters to hectares
- Square millimeters to square kilometers
- Square millimeters to square miles
- Square millimeters to square centimeters
- Square millimeters to square yards
- Square millimeters to square inches
- Square millimeters to pyeong
- Square millimeters to bighas
- Square millimeters to mu
Common amounts of square millimeters
- 0.25 mm²
- 0.5 mm²
- 0.75 mm²
- 1 mm²
- 1.5 mm²
- 2 mm²
- 2.5 mm²
- 3 mm²
- 4 mm²
- 5 mm²
- 6 mm²
- 7 mm²
- 8 mm²
- 9 mm²
- 10 mm²
- 11 mm²
- 12 mm²
- 13 mm²
- 14 mm²
- 15 mm²
- 16 mm²
- 17 mm²
- 18 mm²
- 19 mm²
- 20 mm²
- 21 mm²
- 22 mm²
- 23 mm²
- 24 mm²
- 25 mm²
- 26 mm²
- 27 mm²
- 28 mm²
- 29 mm²
- 30 mm²
- 31 mm²
- 32 mm²
- 33 mm²
- 34 mm²
- 35 mm²
- 36 mm²
- 37 mm²
- 38 mm²
- 39 mm²
- 40 mm²
- 41 mm²
- 42 mm²
- 43 mm²
- 44 mm²
- 45 mm²
- 46 mm²
- 47 mm²
- 48 mm²
- 49 mm²
- 50 mm²
- 60 mm²
- 70 mm²
- 80 mm²
- 90 mm²
- 100 mm²
- 150 mm²
- 200 mm²
- 250 mm²
- 300 mm²
- 400 mm²
- 500 mm²
- 750 mm²
- 1,000 mm²
Convert square millimeters to all 111 other units
Metric
US & imperial
- mm² to ft²
- mm² to ac
- mm² to mi²
- mm² to yd²
- mm² to in²
- mm² to cmil
- mm² to roofing square
- mm² to section
- mm² to rd²
- mm² to US survey acre
- mm² to rood
- mm² to ch²
- mm² to mil²
- mm² to township
- mm² to homestead
- mm² to Irish acre
- mm² to Scottish acre
- mm² to circular inch
- mm² to Cheshire acre
East & Southeast Asian
- mm² to 평
- mm² to 亩
- mm² to 坪
- mm² to ไร่
- mm² to 坪
- mm² to งาน
- mm² to ตร.ว.
- mm² to 顷
- mm² to 町
- mm² to 甲
- mm² to 反
- mm² to 分
- mm² to 단보
- mm² to 정보
- mm² to 畝
- mm² to 厘
- mm² to 合
- mm² to 分
- mm² to 마지기
- mm² to square chi
South Asian
- mm² to bigha
- mm² to kanal
- mm² to marla
- mm² to cent
- mm² to kattha
- mm² to guntha
- mm² to biswa
- mm² to ground
- mm² to ankanam
- mm² to chatak
- mm² to dhur
- mm² to killa
- mm² to murabba
European & Middle Eastern
- mm² to dunam
- mm² to feddan
- mm² to arpent
- mm² to Morgen
- mm² to Joch
- mm² to desyatina
- mm² to jerib
- mm² to qirat
- mm² to Tagwerk
- mm² to square perch (French)
- mm² to square sazhen
- mm² to square versta
Latin American
- mm² to manzana
- mm² to alqueire paulista
- mm² to alqueire mineiro
- mm² to v²
- mm² to cuadra (area)
- mm² to fanega (area)
- mm² to tarea
- mm² to alqueire baiano
- mm² to caballeria
- mm² to square braca
Ancient
- mm² to jugerum
- mm² to aroura
- mm² to centuria
- mm² to actus
- mm² to heredium
- mm² to saltus
- mm² to square Roman foot
- mm² to square plethron
Scientific
Everyday comparisons
Convert to square millimeters
- Square meters to square millimeters
- Square feet to square millimeters
- Acres to square millimeters
- Hectares to square millimeters
- Square kilometers to square millimeters
- Square miles to square millimeters
- Square centimeters to square millimeters
- Square yards to square millimeters
- Square inches to square millimeters
- Pyeong to square millimeters
- Bighas to square millimeters
- Mu to square millimeters
Frequently asked questions
What is a square millimeter?
The square millimeter is one millionth of a square meter.
How is the square millimeter defined?
The area of a square with 1 mm sides.
How many square meters are in a square millimeter?
One square millimeter equals 0.000001 square meters.
How many square feet are in a square millimeter?
One square millimeter equals 0.00001076391 square feet.
How many acres are in a square millimeter?
One square millimeter equals 2.4710538e-10 acres.