After months of rumors and speculation, Activision and Treyarch finally confirmed that Call of Duty: Black Ops 4 will feature a battle royale mode in the form of Blackout. While we do have some details about what Blackout will have in store, Treyarch stopped short of revealing the exact size of the map. Treyarch may not be ready to reveal the size of the Blackout map, but thanks to YouTuber Drift0r, we have an idea.

Using math and comments by Call of Duty: Black Ops 4 developer David Vonderhaar, Drift0r was able to estimate that the Blackout battle royale map will be somewhere between 4.5km2 and 7.4km2 in size.

By comparison, Fortnite‘s map is 5.5km2 and the Erangel map in PlayerUnknown’s Battlegrounds is 64.0km2. This means that if Drift0r’s calculations are correct, the Blackout battle royale map in Call of Duty: Black Ops 4 will be similar in size to Fortnite‘s map, but much smaller than Erangel from PUBG.

Check out Drift0r’s full explanation right here:

Of course, it’s worth pointing out that the Blackout map is far from finalized. Despite having been in development for over a year, Treyarch has yet to make some crucial decisions about Blackout, like if it will have 100 players or not. An official player count has yet to be revealed, and while it will likely have 100 players, some estimations have put the player count below 100 and others at nearly 150.

Considering this, it’s possible that the size of the Blackout map will be adjusted between now and the time it’s made available on October 12. The map size could also be tweaked after launch as well, especially as Treyarch balances the battle royale experience based on player feedback.

Post-launch support for Call of Duty: Black Ops 4 may also see brand new maps for the Blackout battle royale mode. Beyond battle royale, though, fans can expect Treyarch to support the game in other ways as well, through the release of new zombies maps and possibly even the addition of a single player campaign.