As with other robot combat competitions, Robot Wars competitor robots were split into several weight classes (also known as weight categories). Although the first series included robots from various weight classes, subsequent series generally only included heavyweight robots in the main competition, and robots from other weight classes generally only competed in their own small competitions. Because Robot Wars was created in America, the weights were originally dictated in pounds, and converted to kilograms without rounding. The original weight limit for each class was:

  • Featherweight: 11.4kg
  • Lightweight: 22.7kg
  • Middleweight: 45.4kg
  • Heavyweight: 79.4kg
  • Super Heavyweight: 154kg

Some competitors in Series 1-3 were given some leniency. Barry from Series 1 also notably broke the limit by weighing 116.9kg, which would still render the robot a super heavyweight to this day.

The weight limits were increased from Extreme 1 onwards, and an antweight class was added. The new weight limits were:

  • Antweight: 150g
  • Featherweight: 12kg
  • Lightweight: 27kg
  • Middleweight: 54kg
  • Heavyweight: 100kg
  • Super Heavyweight: 200kg

To encourage creativity, walkerbots were allowed to enter one weight class below their actual weight, or weigh up to 200kg in the heavyweight competition (160kg prior to the increased limits). Super heavyweight walkers received no weight bonus. A subdivision of walkerbots, the shufflebot, held the 200kg weight limit until Series 6, where it was reduced to 150kg, but notably still ignored by Ansgar.

The weight limit was increased again in Series 8 of Robot Wars, which only featured one weight class. The weight limit of walkerbots and shufflebots was also altered.[1]

  • Heavyweight: 110kg
  • Heavyweight walkerbot: 135kg
  • Heavyweight shufflebot: 120kg

In Series 10, the weight limits for heavyweight walkerbots and shufflebots were both increased.[2]

  • Heavyweight walkerbot: 145kg
  • Heavyweight shufflebot: 125kg

Additionally, a featherweight class was proposed and announced as part of the initial application process for Series 10. However, due to scheduling issues, the category was subsequently postponed. The weight limits for the proposed featherweight category were as follows:

  • Featherweight: 13.6kg
  • Featherweight walkerbot: 17.6kg
  • Featherweight shufflebot: 15.1kg


From Series 2 onwards, the main competition was intended solely for heavyweight competitors, which meant that robots from other weight classes had to enter their own separate competitions. Series 2 featured competitions for all the other weight classes (except antweight), but these competitions became less frequent in subsequent series and were mainly restricted to special events on Robot Wars Extreme.


Main article: Antweight Championship


Main article: Featherweight Championship


Main article: Lightweight Championship


Main article: Middleweight Championship


Main article: UK Championship

Super HeavyweightEdit

Main article: Super Heavyweight Championship



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