The charges of packers and movers are usually calculated based on various factors such as the distance between the origin and destination, the weight and volume of the items being moved, the type of packing materials required, the number of personnel required for the move, and any additional services like storage, insurance, and unpacking. The charges may also vary depending on the type of vehicle used for transportation and the time of year (peak season vs. off-season). It is advisable to get a detailed quote from the packers and movers company before finalizing the move to avoid any surprise costs later.