Electronic device, crank assembly with electronic device and drive train including crank assembly with electronic device

An electronic device for calculating at least one of a human input force and a human input power that are inputted to a drive train of a human powered vehicle, the electronic device comprising:

• a receiver configured to receive first information with respect to torque applied to the drive train, and to receive at least one of second information with respect to a gear engagement state of a plurality of sprockets with a chain and third information with respect to a crank rotational speed of the drive train;
• a computer memory device having a plurality of prestored correction factors with respect to the gear engagement state;
• and
• a processor configured to calculate at least one of the human input force and the human input power, the human input force being applied to the drive train based on the first information, the second information and at least one of the prestored correction factors, the human input power being based on the first information, the second information, the third information, and at least one of the prestored correction factors.