# Natural Units

From BitcoinWiki

This is the approved revision of this page, as well as being the most recent.

Numbers in the Ethereum blockchain are represented by integers. Currently floating point numbers are not supported. The "natural unit" is the basic integer that represents a number.

## Contents

## ETH Natural Units[edit]

ETH, or ethers, are represented by a natural unit with 18 decimal places.

1 ETH = 1,000,000,000,000,000,000 or 10^18 natural units. The ETH natural unit is also called a wei.

## Token Natural Units[edit]

ERC20 tokens on the Ethereum blockchain also have a natural unit where 1 unit of token is represented by {x} natural units. This is represented by the decimal variable commonly written into the token smart contract. See Ethereum Based Tokens for further information.

For example:

- DGDb and UNI both have 0 decimal places, where 1 unit of token is represented by 1 natural unit.
- REP, GNT and many others have 18 decimal places, where 1 unit of token is represented by 1,000,000,000,000,000,000 or 10^18 natural units.

## Source[edit]

## See Also on BitcoinWiki[edit]

- Generating primes
- Block weight
- SIMD (hash function)
- Verifiable random function
- Common Scrambling Algorithm