The smallest unit of ether. Smart contracts and many APIs expect amounts in wei (1 ETH = 10^18 wei).
By Nadeem Ahmed·Updated 2026-09-09
Human-readable ETH amounts are almost always converted to wei before an on-chain call. Off-by-one-zero mistakes in wei are a common cause of failed or overfunded transactions.
Use a satoshi/gwei/wei converter when you paste values between explorers, ABIs, and wallets so the scale stays obvious.
The smallest unit of ether. Smart contracts and many APIs expect amounts in wei (1 ETH = 10^18 wei).
Human-readable ETH amounts are almost always converted to wei before an on-chain call. Off-by-one-zero mistakes in wei are a common cause of failed or overfunded transactions.
Try Satoshi / Gwei / Wei Converter, Hex / Bytes Converter on CryptonicTools — free, no account.
Updated 2026-09-09. Educational only — not financial advice. All terms