Editing Microplate (section)

====Well position (standardized)====
The well position is also standardized, but only for 96- , 384-, and 1536-well plates. These are generally well followed by manufacturers:  
* Well Positions<ref name="ANSI SLAS 4-2004 link highlight">{{cite web |last1=SLAS |first1=ANSI |title=ANSI SLAS 4-2004 -Well Positions for Microplates |url=https://www.slas.org/education/ansi-slas-microplate-standards/#:~:text=Well%20Positions |access-date=20 April 2023}}</ref><ref name="ANSI SLAS 4-2004 direct">{{cite web |last1=SLAS |first1=ANSI |title=ANSI SLAS 4-2004 - Well Positions for Microplates |url=https://www.slas.org/SLAS/assets/File/public/standards/ANSI_SLAS_4-2004_WellPositions.pdf |access-date=20 April 2023}}</ref>

96-well plates have a 9&nbsp;mm well-to-well spacing, 384-wells a 4.5&nbsp;mm spacing, and 1536-wells a 2.25&nbsp;mm spacing. A notable characteristic is that the well array is symmetrical when the plate is rotated 180˚ around its Z-axis (height axis). Therefore, scientific instruments which use microplates, can accept the plate in one of two rotated orientations - either "correct" or 180˚ rotated.

Other variants like 24-well plates, are not considered in the standard, but there is a [[de facto standard|''de facto'' standard]] to implement to 24-wells by apply the same scaling factor as the 384- to 96-well transition, i.e. 24-wells have an 18&nbsp;mm spacing.