How MMR Is Calculated in Dota 2
How much MMR you gain for a win and lose for a defeat, why solo and party move rating differently, what the unified MMR since 2023 is and how the rating number turns into a medal.
Unified MMR since 2023
Dota 2 used to have two separate ratings — Core MMR (for core roles) and Support MMR (for supports). With patch 7.33 (2023) Valve merged them into a single combined MMR. Now you have one rating number regardless of the position you play.
Role selection in Role Queue (core or support) still exists, but it only affects player matchmaking, not a separate rating. So talk of a "separate support MMR" is no longer relevant today.
How much you get per game
The principle is simple: a win raises your rating, a loss drops it, by roughly the same amount. The baseline figure every player knows is about ±25 MMR per match.
Valve does not publish exact numbers officially, but based on player observations the picture looks like this:
An important point: all roles gain the same. Carry, mid and supports change rating by the same amount — there is no difference between positions.
What affects the size of the change
Why a single game can bring more or less than usual:
- Rating uncertainty. In your first ranked games and right after recalibration the system is not yet confident about your level, so the swings are bigger.
- Solo or party. Games in a group move rating less (around ±20), solo games move it more (around ±30).
- Streaks at the start. While the system is refining your level, win streaks and loss streaks can speed up rating shifts.
- Stabilization. Once your rating has settled, the changes stay around the usual values.
Over the long run your rating is determined by one thing — your win rate. With a winrate above 50% MMR grows, below 50% it falls. No tricks get around the simple math of wins and losses.
How MMR turns into a medal
Your MMR number defines your medal (rank) and the stars within it: roughly every 770 MMR is a new rank, from Herald to Divine, and then Immortal. The full table with exact ranges is in the Dota 2 ranks guide.
Your medal updates as you play along with your rating. There is no longer a forced seasonal reset — how medal re-confirmation now works is covered in the guide on seasonal recalibration.
FAQ
How much MMR do you get for a win in Dota 2?
Roughly around +25 MMR for a win, and about the same is deducted for a loss. Valve does not publish exact values: players observe that solo games shift rating by about ±30, while party games are around ±20 per match.
Is there a separate MMR for core and support?
No. With patch 7.33 (2023) Valve merged the formerly separate Core and Support MMR into a single combined rating. Now you have one MMR number regardless of role, and your position choice in Role Queue only affects matchmaking.
Does your role affect how much MMR you gain?
No. Carry, mid, offlane and support players gain and lose the same amount of MMR per game. The size of the change depends on the mode (solo or party) and on rating uncertainty, not on your role.
Why do you sometimes get more or less MMR?
In your first ranked games and right after recalibration the system is not yet confident about your level, so the swings are bigger. Once your rating settles, the changes stabilize around the usual values.
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