Transport Fever 3 Map Sizes: Every Option in Kilometers

Transport Fever 3 gives every new free-game map a size, an aspect ratio, a climate and a seed. Size is the decision that locks in your RAM budget, your travel times and how many parallel networks the map can feed — so this page lists every option with the exact kilometer values from the official wiki, plus how to unlock the four experimental sizes the new-game screen hides by default.

Want to compare areas side by side instead of doing the math? Our Transport Fever 3 calculator includes a map area comparison tool built on this same table.

What map sizes does Transport Fever 3 have?

Eight sizes, each available in five aspect ratios. In a 1:1 ratio the exact edge lengths are:

Aspect ratios reshape the same rectangle from 1:1 (square) to 1:5 (a long strip). A Medium 1:5 map, for example, is 5.120 × 25.600 km — dramatically different network planning from the 1:1 square, even though the corner-to-corner reach is similar.

How do the aspect ratio variants compare?

The full official grid, in kilometers:

Asterisked rows are experimental sizes. The values come from the official wiki’s map sizes page; the in-game UI rounds them, and exact figures can differ by up to about 250 m.

How do you unlock experimental map sizes?

The Tiny, Huge, Megalomaniac and Gigantomaniac options are gated behind one flag:

1. Close Transport Fever 3 completely.
2. Open the settings.lua file in your userdata directory.
3. Change experimentalMapFeatures = false to experimentalMapFeatures = true.
4. Save and start the game — the extra sizes now appear in the new-map screen.

Two warnings from the official documentation: experimental map sizes require at least 16 GB of RAM, and the same flag also unlocks changing the economy of an existing old save, which the wiki cautions “might lead to unstable situations”. Treat both as unsupported territory.

Which map size should a new player pick?

Community launch-week consensus points away from the giant maps for your first game: on a Megalomaniac map “everything is way too far away and costs way too much money”, and the fixed costs of long routes stack up before any revenue arrives. A comfortable starting spread is Medium or Large at 1:1 — enough room for a mixed rail/road network, close enough that your first cargo line actually pays.

Climate matters as much as size for what you’ll build: Temperate, Subarctic (fjords, marshland, mountains), Dry (canyons and mesas) and Tropical (islands, palms) each change which terrain your routes fight. Our starting position guide walks through reading a freshly generated map before you commit.

How do map sizes compare to Transport Fever 2?

The size ladder is a superset of Transport Fever 2’s: same naming scheme and the same five ratios, precise edge lengths rounded to the 4.096 km grid, and one new top tier — Gigantomaniac at 28.672 km — above TF2’s biggest option. The heightmap resolution system (each heightmap pixel covering 4 × 4 m) is unchanged between the two games, which is why TF2 map-making knowledge transfers directly.

Where do seeds fit in?

Size and ratio shape the map; the seed decides the actual terrain inside it. Same seed plus same settings produces an identical map every time — which is how map sharing works. Our seeds guide covers the mechanic and how to share a map you like.