What is Wei?
Wei is the smallest unit of Ether, the native currency of Ethereum. One Ether equals 1,000,000,000,000,000,000 (10^18) Wei. Since Ethereum transactions require computational power, fees are denominated in Wei and paid as "gas."

Wei is named after Wei Dai, a cryptography pioneer who contributed to the early theoretical foundations of cryptocurrencies. His work on b-money laid the groundwork for smart contracts and decentralized finance

What is Gwei?
Gwei (short for giga-wei) is a common unit for Ethereum gas fees. One Gwei equals 1,000,000,000 (10^9) Wei. It is also known as nanoether or Shannon, named after Claude Shannon, a mathematician known for information theory.

Since gas fees are measured in Gwei, it's the most commonly used unit for transactions. The standard gas cost for a simple Ethereum transaction is 21,000 Gwei. However, fees fluctuate based on network demand and transaction complexity.

Gas Fee Formula:
Gas Units (Limit) × (Base Fee + Tip)

With EIP-1559, Ethereum introduced a base fee and an optional priority tip to optimize transaction fees.

How to Convert Wei to Gwei
Divide the total Wei amount by 1 billion (10^9):

Example:
420,069,000,000 Wei / 1,000,000,000 = 420.069 Gwei

To get the value in USD:
Gwei × (ETH price / 1,000,000,000)

If 1 ETH = $1,000, then:
420.069 Gwei = $0.000420069

How to Convert Wei to Ether
Divide the total Wei amount by 1 quintillion (10^18):

Example:
100,000,000,000,000 Wei / 10^18 = 0.0001 ETH

To get the value in USD:
ETH × ETH price

If 1 ETH = $1,000, then:
0.0001 ETH = $0.10