[Glossary](/glossary.md)/[Mobility](/glossary/category/mobility.md)

# Weight

The vehicle's mass in tonnes, which sets its power-to-weight ratio and decides who wins a collision.

Also known as tonnage, mass.

Weight divides [engine power](/glossary/engine-power.md), so every heavier [module](/glossary/module.md), gun or [turret](/glossary/turret.md) costs mobility. The suspension caps how much a vehicle may carry, which is why an upgraded [chassis](/glossary/tracks.md) is often researched first.

In a collision the heavier vehicle wins. [Ramming](/glossary/ramming.md) damage scales with mass and speed, and a heavy vehicle at speed can destroy a light one outright.

## Related terms

[Power-to-weightEngine horsepower divided by the vehicle's weight in tonnes, the single best predictor of acceleration.](/glossary/power-to-weight.md)[Engine powerThe engine's output in horsepower, which only means something next to the weight it has to move.](/glossary/engine-power.md)[RammingDeliberately colliding with another vehicle, where damage scales with mass and closing speed and both sides take some.](/glossary/ramming.md)

[Every World of Tanks term](/glossary.md)

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