While lawn mower weights vary significantly depending on the lawn mower, 30 pounds is a standard weight for a push lawn mower, and 105 pounds is a standard weight for a power lawn mower. Riding lawn mowers, which are much larger, usually weigh over 300 pounds.
Riding lawn mowers that have more powerful engines tend to weigh more. A standard weight for a riding lawn mower with a 12-horsepower engine is 325 pounds. A riding lawn mower with an 18-horsepower engine typically weighs 450 pounds, while one with a 22-horsepower engine typically weighs 525 pounds. Professional lawn mowers usually have more attachments and accessories, increasing the mower's weight.