A Space Marine in power armour weighs 500–1,000 kg (about 1,100–2,200 lb) according to the Deathwatch Core Rulebook. That is the game’s typical weight for an unarmed Marine wearing power armour—not a universal figure fixed across every Warhammer 40,000 story.
What does the 500–1,000 kg figure include?
The Deathwatch Core Rulebook describes an unarmed Space Marine wearing power armour as typically weighing 500–1,000 kg and standing slightly over 2.1 metres tall. The rulebook presents a range, not one exact weight: a particular Marine may be lighter or heavier. The weight is for the armoured character, not just the suit, and the quoted description specifies that he is unarmed.
These are role-playing game specifications, not real-world measurements or a verified franchise-wide standard. Other Warhammer 40,000 stories may not use the same figure.
How heavy is the armour by itself?
The rulebook lists armour masses separately from its figure for the whole Marine wearing power armour:
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| Armour type | Listed armour mass |
|---|---|
| Astartes power armour | 180 kg |
| Astartes Terminator armour | 400 kg |
These figures are for the armour, not the wearer. The book does not give an unarmoured body-weight range by subtracting the standard suit’s mass from the 500–1,000 kg total, so that calculation should not be treated as a published Marine weight.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why can a Marine move in such heavy armour?
Games Workshop explains that power armour connects to a battle-brother through neural cables linked to the Black Carapace. The system replicates the wearer’s movements, while the armour augments his strength. It is described as heavy and cumbersome, but its powered systems and neural interface mean it does not behave like an inert load the wearer must move unaided. Games Workshop’s explanation of power armour describes these connections and systems.
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The armour also has a power source in its backpack. Games Workshop notes that if it fails, the suit’s neural fibres stop working and the wearer is “encumbered by the weight of his armour.” In other words, the suit’s mass remains substantial; powered assistance is what makes it practical to wear in combat. The same official article explains the consequence of a power failure.
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