Wei: the smallest denomination of Ether
Wei is the smallest unit of measurement of Ether (the ETH) on the Ethereum network. Understanding the conversion between Wei、Gwei and ETH helps with reading data such as small transfers, Gas prices, and transaction fees.
Wei and ETH conversion
Wei is the smallest denomination of Ether, and 1 ETH equals 10¹⁸ Wei, that is, 1,000,000,000,000,000,000 Wei. Because the difference between the two is substantial,Wei is suitable for precisely representing extremely small amounts, while ETH is more convenient for expressing larger values that are easier to read in everyday use.
Why different denominations are needed
When the transaction amount or fee accounts for only a small amount of ETH, writing a long string of decimal places directly is inconvenient. Ethereum therefore uses denominations such as Wei、Gwei、Ether to represent different orders of magnitude, among which Gwei is commonly used to measure Gas prices, making it easier to set and compare transaction fees.
Common unit relationships
Common conversions include: 1 Kwei equals 10³ Wei，1 Mwei equals 10⁶ Wei，1 Gwei equals 10⁹ Wei，1 Microether equals 10¹² Wei，1 Milliether equals 10¹⁵ Wei, while 1 Ether equals 10¹⁸ Wei。
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/wei
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