How much MMR do I gain per win LoL?

Theres no set number as to how much you gain per game since its all in your MMR but by your LP gains, you are losing about 2 to 3 times as much MMR as you are winning.

Does your MMR go up when you win?

Winning usually increases the MMR, and losing decreases it. In simple terms, it is a number that tells the system where you stand amongst other people. MMR is usually used to identify people and put the people of the same MMR in the same match, therefore making the game even.

What is a good LoL MMR?

WHAT IS LOW, HIGH AND NORMAL MMR IN LoLIf your LP gain is equal to 17-22 then you MMR is normal for your league and you will play against players whose league is close to yours.If your LP gain is equal to 22-40+ then your MMR is higher than current league.More items •Nov 12, 2017