# Natural Units

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.

## ETH Natural Units

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

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

## See Also on BitcoinWiki

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

This page was moved from enbitwiki:en:Natural Units. Its edit history can be viewed at Natural Units/edithistory