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Home of the Northwest Robot Sumo Tournament

Robot sumo is one of the most popular robotics events in the world, where two robots try to push each other out of a circular ring. There are two general classifications of sumo robots, autonomous and remote control, that compete in different weight divisions. The following table lists the various weight divisions, maxium sizes, as well as the diameter of the sumo ring.

Division Length Width Height Max-weight Sumo Ring Diameter
3kg (Japanese) 20 cm 20 cm Unlimited 3 kg 154 cm
Mini 10 cm 10 cm Unlimited 500 g 77 cm
Micro 5 cm 5 cm 5 cm 100 g 38.5 cm
Nano 2.5 cm 2.5 cm 2.5 cm Unlimited 19.25
Light Weight 20 cm 20 cm Unlimited 1.0 kg 154 cm
Middle Weight 20 cm 20 cm Unlimited 1.5 kg 154 cm
LEGO 20 cm 20 cm Unlimited 3 kg 77 cm

The rules for all of the weight divisions are the same. The only difference between them are the sizes of the robots and sumo ring.

Robot Sumo Rules

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