2.5, 2½ or two and a half may refer to:
- Technology
- Version 2.5 or v2.5, a designation used in software versioning
- 2.5D, or 3/4 perspective and pseudo-3D, an attempt to render 3-dimensional images in 2-dimensions
- 2.5D (machining), technique used in machining to project a plane into 3rd dimension
- 2.5D (visual perception), effect in visual perception where the 3D environment of the observer is projected onto the 2D planes of the retinas
- 2.5G phone network; see 2G
- 2.5-millimeter band
- Culture
- Two and a Half Men, American television sitcom
- Hood Hop 2.5, 2009 album by J-Kwon
- Jackass 2.5, a 2007 direct-to-video feature; see Jackass Number Two
- Proposition 2½, Massachusetts statute which limits property tax increases by municipalities
See also
Topics referred to by the same termThis disambiguation page lists articles associated with the same number.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: