Convert Twip (twip) to Chain (US Survey) (ch (US)) instantly.
About these units
Twip (twip)
A twip is a twentieth of a point, equal to 1/1440 of an inch. This extremely small unit originated in computer typography, particularly in early word processors and GUI layout systems developed by Microsoft and Apple. Because digital screens and software-based layout engines require highly precise internal measurements, twips allowed consistent and resolution-independent positioning of graphical objects and text. Even when the actual pixel density of displays varied, twips provided a device-agnostic coordinate system. Twips remain particularly relevant in Microsoft technologies such as Visual Basic, Windows API interfaces, and the formatting of Office documents. Although ordinary users rarely encounter the term, twips form part of the invisible numerical infrastructure that ensures consistent layout across different computers, printers, and operating systems.
Chain (US Survey) (ch (US))
The US Survey Chain is defined as 66 US Survey Feet (~20.1168 meters), aligning with the historic Gunter's chain but adapted to the US survey foot. It is used primarily in cadastral surveys, property delineation, and historical land records. Surveyors employ the chain for practical measurements of fields, lots, and infrastructure layouts. The unit's subdivision into 100 links simplifies area calculation, as 10 square chains equal one acre, maintaining continuity with older surveying systems. Even today, engineers and surveyors working with legacy data encounter the US survey chain in historical deeds, maps, and legal descriptions. Its precision ensures consistency when reconciling pre-modern measurements with modern coordinates.