3X

3X or 3-X may refer to:

• Three times or thrice
• 3X Krazy, American hip-hop group
• Yeah 3x, single by Chris Brown
• Windows 3.x
• ArcView 3.x
• Windows NT 3.x
• IBM System/3X
• 3X, IATA code for Japan Air Commuter
• 3X or XXX, a reference to the municipal flag of Amsterdam*
• HTV-3X, see DARPA Falcon Project
• Look 3X; see Look Look Look
• Alberta Highway 3X; see List of Alberta provincial highways
• Saab 9-3X, a model of Saab 9-3
• SEV-3X, a model of Seversky SEV-3