Rectangle perimeter calculatorCalculate the perimeter of a rectangle instantly from its length and width.LengthMillimetre (mm)Centimetre (cm)Metre (m)Kilometre (km)Inch (in)Foot (ft)Yard (yd)+WidthMillimetre (mm)Centimetre (cm)Metre (m)Kilometre (km)Inch (in)Foot (ft)Yard (yd)Perimeter—