How do I convert SteamID3 to SteamID64?

Paste your SteamID3 into the converter above and the SteamID64 appears instantly. Worked through by hand: Take X directly; it is already the account ID. Add 76561197960265728 to the account ID. For example, [U:1:52079950] becomes 76561198012345678.

Convert SteamID3 to SteamID64

Paste a SteamID3 below to get the SteamID64 straight away. The conversion runs in your browser, so nothing is sent anywhere and there is no sign-in.

SteamID3 input

SteamID64 appears here

Example: [U:1:52079950] converts to 76561198012345678

How the conversion works

Both formats describe the same underlying account, so the conversion is arithmetic rather than a lookup. Every Steam identifier is built from one 32-bit account number, and the route from SteamID3 to SteamID64 goes through it:

Start with the SteamID3. Take X directly; it is already the account ID. For [U:1:52079950] that gives an account ID of 52079950.
Build the SteamID64. Add 76561197960265728 to the account ID. That produces 76561198012345678.

Worked example

Step	Value
SteamID3 in	`[U:1:52079950]`
Account ID	`52079950`
SteamID64 equivalent	`76561198012345678`
SteamID64 out	`76561198012345678`

What a SteamID3 is

The current textual format, written [U:1:X], where U marks an individual user, 1 is the universe, and X is simply the account ID with no bit-splitting. It is the cleanest of the textual formats because X is the raw number.

Modern Source and Source 2 servers report this in the console status output, CS2 demo files use it, and newer SourceMod builds emit it. If you copied an ID out of a server console in the last few years, it almost certainly looked like this.

What a SteamID64 is

A 17-digit number and the format Steam itself uses everywhere internally. It is the account ID added to a fixed base of 76561197960265728, which is why every individual account's SteamID64 starts with 7656119.

Every endpoint of the Steam Web API takes this format, and it is what you see in a profile URL of the form steamcommunity.com/profiles/76561198012345678. If you are writing anything that talks to Steam programmatically, this is the format you store.

Converting more than one ID

This page handles a single ID at a time. To convert a whole list at once — a ban file, an admin config, a spreadsheet column — use the bulk converter, which accepts mixed formats and custom profile URLs in the same paste.