1 circular inches = 506.7075 square millimeters 

Circular inches to Square millimeters Conversion

Circular inch to square millimeter conversion allow you make a conversion between circular inch and square millimeter easily. You can find the tool in the following.

Area Conversion


= 506.70750000
= 5.06707 × 102
= 5.06707E2
= 5.06707e2
= 1,013.41500000
= 10.1341 × 102
= 10.1341E2
= 10.1341e2
= 1,520.12250000
= 15.2012 × 102
= 15.2012E2
= 15.2012e2
= 2,026.83000000
= 20.2683 × 102
= 20.2683E2
= 20.2683e2
= 2,533.53750000
= 25.3354 × 102
= 25.3354E2
= 25.3354e2

Quick Look: circular inches to square millimeters

circular inch1 circ in2 circ in3 circ in4 circ in5 circ in6 circ in7 circ in8 circ in9 circ in10 circ in11 circ in12 circ in13 circ in14 circ in15 circ in16 circ in17 circ in18 circ in19 circ in20 circ in21 circ in22 circ in23 circ in24 circ in25 circ in26 circ in27 circ in28 circ in29 circ in30 circ in31 circ in32 circ in33 circ in34 circ in35 circ in36 circ in37 circ in38 circ in39 circ in40 circ in41 circ in42 circ in43 circ in44 circ in45 circ in46 circ in47 circ in48 circ in49 circ in50 circ in51 circ in52 circ in53 circ in54 circ in55 circ in56 circ in57 circ in58 circ in59 circ in60 circ in61 circ in62 circ in63 circ in64 circ in65 circ in66 circ in67 circ in68 circ in69 circ in70 circ in71 circ in72 circ in73 circ in74 circ in75 circ in76 circ in77 circ in78 circ in79 circ in80 circ in81 circ in82 circ in83 circ in84 circ in85 circ in86 circ in87 circ in88 circ in89 circ in90 circ in91 circ in92 circ in93 circ in94 circ in95 circ in96 circ in97 circ in98 circ in99 circ in100 circ in
square millimeter506.7075 mm21,013.415 mm21,520.1225 mm22,026.83 mm22,533.5375 mm23,040.245 mm23,546.9525 mm24,053.66 mm24,560.3675 mm25,067.075 mm25,573.7825 mm26,080.49 mm26,587.1975 mm27,093.905 mm27,600.6125 mm28,107.32 mm28,614.0275 mm29,120.735 mm29,627.4425 mm210,134.15 mm210,640.8575 mm211,147.565 mm211,654.2725 mm212,160.98 mm212,667.6875 mm213,174.395 mm213,681.1025 mm214,187.81 mm214,694.5175 mm215,201.225 mm215,707.9325 mm216,214.64 mm216,721.3475 mm217,228.055 mm217,734.7625 mm218,241.47 mm218,748.1775 mm219,254.885 mm219,761.5925 mm220,268.3 mm220,775.0075 mm221,281.715 mm221,788.4225 mm222,295.13 mm222,801.8375 mm223,308.545 mm223,815.2525 mm224,321.96 mm224,828.6675 mm225,335.375 mm225,842.0825 mm226,348.79 mm226,855.4975 mm227,362.205 mm227,868.9125 mm228,375.62 mm228,882.3275 mm229,389.035 mm229,895.7425 mm230,402.45 mm230,909.1575 mm231,415.865 mm231,922.5725 mm232,429.28 mm232,935.9875 mm233,442.695 mm233,949.4025 mm234,456.11 mm234,962.8175 mm235,469.525 mm235,976.2325 mm236,482.94 mm236,989.6475 mm237,496.355 mm238,003.0625 mm238,509.77 mm239,016.4775 mm239,523.185 mm240,029.8925 mm240,536.6 mm241,043.3075 mm241,550.015 mm242,056.7225 mm242,563.43 mm243,070.1375 mm243,576.845 mm244,083.5525 mm244,590.26 mm245,096.9675 mm245,603.675 mm246,110.3825 mm246,617.09 mm247,123.7975 mm247,630.505 mm248,137.2125 mm248,643.92 mm249,150.6275 mm249,657.335 mm250,164.0425 mm250,670.75 mm2

circular inch is a unit of area. it uses in Imperial/US system. it exactly equal  π4 sq in and approximately ≈ 5.067075 × 10−4 m2

Name of unitSymbolDefinitionRelation to SI unitsUnit System
circular inchcirc in

π4 sq in

5.067075×10−4 m2


conversion table

circular inchessquare millimeterscircular inchessquare millimeters
1= 506.70756= 3040.245
2= 1013.4157= 3546.9525
3= 1520.12258= 4053.66
4= 2026.839= 4560.3675
5= 2533.537510= 5067.075

Square millimetre or Square millimeter is a SI prefixes applied unit of area, symbol mm2, is a multiple of the of SI prefixes (milli) used with the metre.

Name of unitSymbolDefinitionRelation to SI unitsUnit System
square millimetermm2

≡ 1 mm × 1 mm ≡ 10-3 m × 10-3 m

= 10-6 m2

Metric system SI

conversion table

square millimeterscircular inchessquare millimeterscircular inches
1= 0.00197352515997896= 0.011841150959873
2= 0.00394705031995787= 0.013814676119852
3= 0.00592057547993678= 0.015788201279831
4= 0.00789410063991559= 0.01776172643981
5= 0.009867625799894410= 0.019735251599789

Conversion table

circular inchessquare millimeters
1= 506.7075
0.0019735= 1


exactly equal
approximately equal to
=equal to
digitsindicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)