Typically, they range in power from 500W to 1000W. A rule of thumb is 700W and above should handle most jobs. Smaller, easier jobs consisting of softer foods do perfectly well at the low end of the power wattage spectrum. On the higher end (wattage closer to and above 1000W), you get more professional quality. With a higher power motor, the processor should be able to handle even the most difficult kitchen prep, including tough fruits and veggies, frozen items, and dough.