About 0.45 kg. Dumbbell is an auxiliary equipment for weightlifting and fitness. The weight of light dumbbell is 1 lb, 2 lb, 3 lb, 5 lb, 8 lb, 12 lb, etc. 1 lb =0.4536 kg. The weights of heavy dumbbells are 10 kg, 15 kg, 30 kg, etc.

Small dumbbells are heavier.

Because there is no sound during practice, it is named dumbbell, which is a simple instrument to strengthen muscle strength training. The main material is cast iron, and some of them are covered with rubber.

According to the material and technology, dumbbells can be divided into four categories: plastic-impregnated dumbbells, rubber-coated dumbbells, painted dumbbells and wooden steel dumbbells.

Dumbbell movements include: dumbbell shoulder push-ups, dumbbell upright rowing, supine bending arm pull-ups, dumbbell alternate bending, dumbbell support bending, dumbbell squat, dumbbell one-legged heel lifting and so on.