# Parts Per Converter

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#### Whats is Parts-per notation ?

**Parts-per notation** is a system of expressing very small quantities of one substance as a ratio to the total amount of that** substance in a mixture**.**Parts-per notation** is a system of expressing very small quantities of one substance as a ratio to the total amount of that **substance in a mixture**. The prefix "*parts-per*" is used to denote a ratio of one part of a **substance to one million parts** of another substance.**Parts-per** notation is used in science to indicate very small amounts.

#### Parts-per notation converter web tools

**Parts-per** notation is a way to express ratios of quantities of two ingredients. For example, *a ratio of 1/4 could be expressed as 0.25*. This is a common way to express the ratio of two quantities of the same substance.

The first thing you should know about **Parts-per notation** is that it is a mathematical notation for expressing the ratio of a given number of particles of one substance to the same number of particles of another substance. The second thing you should know is that there are a number of **web-based Parts-per notatio**n converters available

#### Parts-per notation useful

**Parts-per notation** is a system for expressing very **small quantities** of one substance as a proportion by **weight** of some other substance. For example, **parts-per-million** *(ppm)* is a measure of the number of parts of a substance** per million parts** of the other substance.

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