1:1

1:1 may refer to:

• 1:1 scale
• 1:1 correspondence, the same as a set-theoretical bijection
• 1:1 line in a 2-dimensional Cartesian coordinates
• 1:1 aspect ratio (image), the square format
• 1:1 pixel mapping
• One to one computing (education)

See also

• 1-1 (disambiguation)
• One-to-one (disambiguation)