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