Megaohm is an electrical resistance unit used in circuit calculations and component ratings.
The prefix mega- (one million, from Greek megas, great) was formally adopted with the SI in 1960; the megaohm is used for insulation resistance tests and high-value resistors.
Measurement system: Electrical engineering and circuit-analysis usage. SI equivalent: 1 MΩ = 1.000000e+6 Ω.
Megaohm facts
- Unit name
- Megaohm
- Symbol
- MΩ
- Category
- Resistance
- Measurement system
- Electrical engineering and circuit-analysis usage
- SI equivalent
- 1 MΩ = 1.000000e+6 Ω
- Common uses
- Resistors, circuit design, diagnostics and electrical calculations
Definition of the megaohm
Megaohm is an electrical resistance unit used in circuit calculations and component ratings.
Measurement system and SI relationship
Electrical engineering and circuit-analysis usage
SI equivalent: 1 MΩ = 1.000000e+6 Ω
History of the megaohm
The prefix mega- (one million, from Greek megas, great) was formally adopted with the SI in 1960; the megaohm is used for insulation resistance tests and high-value resistors.
Where is the megaohm used?
Resistors, circuit design, diagnostics and electrical calculations