This calculator uses the standard formula: MCD = System Voltage × SCD. It helps engineers quickly determine the required insulator length based on environmental pollution levels.
| Light | Clean rural areas (16 mm/kV) |
| Medium | Normal industry (20 mm/kV) |
| Heavy | Near sea/Chemical (25 mm/kV) |
| Very Heavy | Desert/Direct spray (31 mm/kV) |