Map Size Calculator

Bits per tile index controls how many bytes each individual tile instance takes to store, so doubling it from 16 to 32 bits directly doubles the storage cost for every tile in every layer across the entire map, independent of map dimensions or tile count. The tradeoff is that a larger index can reference a much bigger set of unique tile types — 16 bits caps out around 65,536, while 32 bits supports over 4 billion.

Tileset memory reflects the fixed set of unique tile images used to build the map — assumed here at 256 distinct tiles — not how many times those images get reused across the map's tile grid. A 50x50 map and a 500x500 map built from the identical 256-tile set cost exactly the same tileset memory; only the map data size, which tracks how many tile instances reference that set, grows with map dimensions.

Layers stack on top of each other at the same map footprint — a ground layer, an object layer, and an overlay layer all cover the identical width and height, so adding a layer multiplies the total tile instance count and therefore memory, but it never extends the map's rendered width or height in pixels. Pixel dimensions only depend on tile count across width and height and the size of each tile.

Not necessarily — this calculator estimates raw uncompressed map data and tileset memory, but real games often compress tilemap data significantly and stream large maps in sections rather than holding the entire map in memory at once. Treat the total memory figure as a useful upper-bound planning number rather than a guaranteed runtime footprint, since actual engine-level optimizations can reduce it substantially.