If, for instance, your weight limit is 1000g, then you have a remaining 584g for weapon, frame and armor, and wheels and drive. If you are allocating 205g for the batteries and AA battery pack, 48g for IR receivers, 163g for two Ls and an XL motor, then you’ve used up 416g against your robot’s weight limit. Since batteries, receivers, and motors are always part of your build, you can determine the remaining allowance of weight after estimating what is being allocated for those components first. Individual weight of parts can be found on their respective entries on Bricklink. I would recommend dividing your build into subsections, so you can calculate the necessary weight for crucial parts: It can be difficult to balance the weight of your bot. The reason that weight limits in robot combat exist is so that one cannot simply build an invincible cinder block.

In Battle Bricks, the weight limit is two pounds, and in the UK, one kilogram. When building for a competition, the rules surrounding weight limit is the primary restriction you must build around.

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