▁resistance ▁by ▁the ▁film ▁thick ness ▁in ▁cm : ▁ ▁Units ▁ ▁She et ▁resistance ▁is ▁a ▁special ▁case ▁of ▁resist ivity ▁for ▁a ▁uniform ▁sheet ▁thick ness . ▁ ▁Comm only , ▁resist ivity ▁( also ▁known ▁as ▁bulk ▁resist ivity , ▁specific ▁elect rical ▁resist ivity , ▁or ▁volume ▁resist ivity ) ▁is ▁in ▁units ▁of ▁ Ω · m , ▁which ▁is ▁more ▁completely ▁stated ▁in ▁units ▁of ▁ Ω · m 2 / m ▁( Ω · area / length ). ▁When ▁divided ▁by ▁the ▁sheet ▁thick ness ▁( m ), ▁the ▁units ▁are ▁ Ω · m · ( m / m )/ m ▁= ▁ Ω . ▁The ▁term ▁"( m / m )" ▁can c els , ▁but ▁represents ▁a ▁special ▁" square " ▁situation ▁yield ing ▁an ▁answer ▁in ▁oh ms . ▁An ▁alternative , ▁common ▁unit ▁is ▁" oh ms ▁square " ▁( den oted ▁"") ▁or ▁" oh ms ▁per ▁square " ▁( den oted ▁" Ω / sq " ▁or ▁" "), ▁which ▁is ▁dimension ally ▁equal ▁to ▁an ▁o hm , ▁but ▁is ▁exclus ively ▁used ▁for ▁sheet ▁resistance . ▁This ▁is ▁an ▁advantage , ▁because ▁sheet ▁resistance ▁of ▁ 1   Ω ▁could ▁be ▁taken ▁out ▁of ▁context ▁and ▁mis inter pre ted ▁as ▁bulk ▁resistance ▁of ▁ 1   oh m , ▁whereas ▁sheet ▁resistance ▁of ▁ 1   Ω / sq ▁cannot ▁thus ▁be ▁mis inter pre ted . ▁ ▁The ▁reason ▁for ▁the ▁name ▁" oh ms