What are blockchain confirmations?

What Are Blockchain Confirmations?

A confirmation means your transaction has been included in a block that the network accepts. The first block that includes your transaction gives it one confirmation. Each new block built on top of that adds another confirmation. The more confirmations, the harder it becomes for the transaction to be reversed (e.g. by a chain reorganization).

Why They Matter

Blockchains can have temporary forks: two valid blocks at the same height. The network eventually agrees on one chain. If your transaction was in a block that gets dropped, it could be reversed. Waiting for multiple confirmations reduces that risk. Exchanges often require a set number of confirmations before crediting your deposit.

How Many to Wait For

Bitcoin users often wait for 3 to 6 confirmations for larger amounts. Ethereum and other chains have different rules. For small transfers, one confirmation may be enough. For high-value moves, follow the platform's recommendation or wait longer.