1K2

1k2 is a common electronics notation used to denote a resistance value of 1.2 kiloohms (1200 ohms). In this form, the letter K stands for kilo (10^3) and replaces the decimal point. The digits before the K represent the whole number part, and the digits after the K indicate the fractional part. Thus 1K2 reads as 1.2 kilohms. This notation is widely seen on fixed resistors, particularly on through-hole parts and some surface-mount components, where space on the body is limited and a concise marking is preferred.

Examples of related markings include 4K7 for 4.7 kilohms and 2K2 for 2.2 kilohms. The K notation provides an unambiguous way to express common decimal values without using decimal points, which can be convenient for quick visual identification in schematics, parts lists, and on component bodies. While 1k2 is standard in many regions and manufacturers, some catalogs and documentation may use alternative formats, such as 1200 Ω or 1.2 kΩ, depending on regional conventions or historical practices.

In practice, 1k2 can appear on a variety of resistor types, including carbon composition, metal film, and resistor networks. When reading circuits, the numeric value is primarily determined by the marked resistance, and the power rating, tolerance, and temperature coefficient are specified separately in the component’s datasheet or accompanying documentation rather than in the value marking alone.