you would need 4 for the front tire and as many as 6 for the rear tire to fully inflate. The purpose of these kits is not to inflate your tire fully, it's to inflate your tires to the point where you can limp to a service station to top them off.
A few folks carry a compact compressor that plugs into the battery tender port as a means of inflating a tire completely. A compact bicycle pump works as well and is easy to store on bike
I used the "StopnGo" 2 weeks ago. Had to use two plugs since I picked up a large staple. Worked very well. It took 3 cartridges to get 22# in the front. It was enough to get me to my dealer for a new tire. Much better than a tow truck.