Estimate where your MMR sits relative to your rank, from LP flow.

Riot does not expose MMR and no site can read it. What MMR does leak is the exchange rate: when MMR matches rank, wins and losses move you roughly symmetrically. Asymmetry is the signal.

Estimate lifetime hours from account level, with the math shown.

Levels are earned almost entirely by finishing games, so level is the only signal that reflects a whole account history. Expect about 20% error.

How many games a climb takes at a given winrate, or whether it runs backward.

LP totals are cumulative: one division is 100 LP, one tier is 400 LP. So Gold IV 0 LP to Plat IV 0 LP is 400.

Calculate KDA with an honest, role-aware read.

What the research actually supports about cognition and gaming performance.

Included because these numbers get misquoted constantly in both directions.

Estimate how much of a reaction-test score is equipment rather than you.

A reaction test measures the whole chain: the screen has to draw the stimulus and the input device has to report the response. Only the middle is you, and the rest is worth real milliseconds.

Days remaining until a ranked season boundary or any other date.

Pass from_date (YYYY-MM-DD) to compute from a fixed day; otherwise uses today.

Free tools and cognitive tests on the web.