Which map size should I choose?

3500 is the common value for around a hundred players; go smaller for a small server and test performance before enlarging.

Does the same seed always give the same map?

The map depends on seed, size and game version: changing any of them (or a major update) can produce a different map.

Rust 100% localFreeOpen access

Rust map size calculator

Estimate the population that suits a Rust map size (1000-6000), validate the seed and copy the launch arguments.

Last updated: 10/9/2026

100% local processing — saved in your browser.

Documentation

Parameters

Saved automatically in your browser (nothing is uploaded).

server.worldsize

From 1000 to 6000.

server.seed

Integer from 0 to 2147483647.

server.maxplayers

Target density

Community rule of thumb (players per km²), unofficial.

Result

Map area : 12.3 km²

Indicative population : ~98

Suggested size for your slots : 3536

Indicative estimate: test your server's real performance.

+server.worldsize 3500 +server.seed 12345 +server.maxplayers 100

Server installation guideNo server yet? Install it locally or on a VPS / dedicated server, ports and firewall included.

How to use Rust map size calculator?

Rust's procedural map is defined by server.worldsize (1000 to 6000) and server.seed (0 to 2147483647). The larger the map, the more disk and memory it uses. This tool computes the area and an indicative population.

Enter the map size (server.worldsize) and the seed.
Enter the slot count and the player density you want.
Read the area, indicative population and suggested size; fix any range warnings.
Copy the +server.worldsize / +server.seed / +server.maxplayers arguments into your launch line.

Read the full documentation →