Arbitrum One in Practice: What Matters for Bridge, Gas and the Seven-Day Wait

Arbitrum One is the largest extension of Ethereum measured by the capital deposited on it. Anyone holding a balance there for the first time runs into three questions the price does not answer: how do you get there, where do you see your holdings, and why does the way back take a week. The short answer to the last one: that week is precisely the security promise you are paid for with low fees. We measured the numbers on the chain ourselves today. A simple transfer on Arbitrum One cost around 0.001 euros on September 28, 2026 at about 6:55 UTC, while the same transfer on Ethereum itself cost roughly 0.007 euros in the same minute. The gap is narrower than usual because the main chain is currently unusually quiet, which is a good illustration of why blanket fee comparisons mislead. This guide belongs to our series on the major networks; the overview of networks, bridges and explorers sets out how the pieces fit together. Setting Up Arbitrum One: Chain ID 42161 and Why No New Wallet Is Needed Arbitrum One is an EVM chain. Addresses, signatures and contracts work as they do on Ethereum, which is why you do not need a separate wallet: your existing Ethereum address is the same address o...