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What does ‘K’ mean in money?

We see the letter “K” beside numbers when pertaining to money. But what does K mean in money?

Simple Answer:

10k money stack shown“K” in money means a thousand. In Mathematics, Kilo means thousand, thus, the letter K. For example, 5K money basically just means five thousand (5,000). When used with currencies, 10K money is $10,000.

In-Depth Explanation:

The Origin of the Word “Kilo”

Kilo came from the Greek word “chilloi”. When the French introduced the metric system, they used the word “kilo” to represent a thousand. However, for the Greeks, the French representation of the word chilloi is a little different. In the Bible, this Greek word describes an indefinite time.

Kilo as an SI Prefix

An SI Prefix is used in Mathematics to avoid the display of very large, or very small values of numbers. A few, common examples of SI Prefixes are: mega (1,000,000), kilo (1,000), and micro (0.000 001). Kilo’s Scientific Notation is 103 (ten to the power of three), or simply, three zeros.

It’s good to remember the Scientific Notation when talking about K in money: Kilo is three zeros, so that means 15K in money means 15 plus three zeros, or 15,000.


  • 1k in money means 1,000
  • 4k in money means 4,000
  • 5k in money means 5,000
  • 15k in money means 15,000
  • 25k in money means 25,000
  • 50k in money means 50,000
  • 100k in money means 100,000
  • 2000k in money means 2,000,000
Updated: April 19, 2017 — 2:20 am

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