League-of-legends – that distance on the chat

To update this question, it is visible on your summoner page on your banner. It will either give you a time until it is available or say that it is currently available.

Champion level and time spent in the game are the main factors - longer games = longer death timers; higher level = longer death timers.

On Summoner's Rift time spent dead scales from 12-50 seconds as Wiki says.

There isn't a calculated formula for champion death time, at least not one known by the players.

There are some ways to reduce this time. Utility tier one mastery Good Hands reduces death time by 4% / 7% / 10%. Each Quintessence of Revival reducse death time by 5%. There is also the summoner spell Revive which instantly revives your champion.

Different maps have different death timers as well. From shortest to longest:

1. Dominion
2. Proving Grounds
3. Twisted Treeline (3v3 map)
4. Summoner's Rift (5v5 map)