ECU may refer to:
Automotive
- Electronic control unit, a generic term for any embedded system that controls one or more of the electrical systems or subsystems in a motor vehicle
- Engine control unit, one type of electronic control unit that manages an engine's operation
Currencies
- European Currency Unit, a former basket of the currencies of the European Community, precursor to the euro
- Écu, the name of several French coins
Organisations
- Eurasian Customs Union, comprising members of the Eurasian Economic Union
- European Chess Union, an independent association
Universities
- East Carolina University, in Greenville, North Carolina, US
- East Central University, in Ada, Oklahoma, US
- Edith Cowan University, in Perth, Australia
- Emily Carr University, in Vancouver, Canada
Other uses
- Elastic compute unit, a measure of computer power specific to the Amazon Elastic Compute Cloud
- Ecuador (ISO 3166-1 code)
- Extreme close-up, in cinematography
- ÉCU The European Independent Film Festival
See also
- ECU Joondalup SC, an Australian soccer club