How MMR Is Calculated in Dota 2
How much MMR you gain for a win and lose for a defeat, why a match brings anywhere from 10 to 40 MMR and low rating climbs faster than you'd expect, 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. There is no longer a single fixed number — a match brings roughly 10 to 40 MMR. The familiar baseline everything revolves around is about ±25 per game, but the real figure floats.
Valve does not publish exact numbers officially, but based on player observations the picture looks like this:
Why the wide range: the system looks at how confident it is in your rating (Rank Confidence) and at the MMR gap between the two teams. While it is unsure of your level — at low MMR, in calibration, after a long break — a win gives closer to +40, to pull you toward your true rank faster. Once the rating settles, changes land around ±25 (solo closer to 30, party around 20).
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:
- Rank Confidence. The main factor. In your first ranked games (covered in detail in the MMR calibration guide), after a long break and at low MMR the system is not yet confident about your level — the swings are bigger and a win can bring up to +40. The steadier your rating, the closer the gain gets to the usual ±25.
- MMR gap between teams. Beat opponents rated above you and you gain more; win against a clearly lower-rated team and you get less. That is where the ~+10 lower bound comes from.
- Solo or party. Games in a group move rating less (around ±20), solo games move it more (around ±30).
- 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; the working ways to keep it in the green are covered in the how to raise MMR guide. 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 — which you reach once you break into 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?
There is no fixed number — a match gives roughly 10 to 40 MMR. The familiar baseline is about ±25 (solo closer to 30, party around 20), but the exact amount depends on how confident the system is in your rating and the MMR gap between the two teams. At low MMR and during calibration a win gives closer to +40.
Is it true you get +40 per win at low MMR?
Partly yes, but it is not about a specific threshold like 4000 MMR. The size of the gain is set by how confident the system is in your rating: at low MMR, in calibration and after a break that confidence is lower, so a win often brings up to +40 — this pulls you toward your true rank faster. It is a general mechanic, not a special rule for one rank.
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?
Two factors: rank confidence and the MMR gap between teams. In your first ranked games, after a long break and at low MMR the system is not yet confident about your level, so the swings are bigger — up to +40. Beating a stronger team gives more, beating a much weaker one gives as little as about +10. Once your rating settles, the changes stabilize around ±25.
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