Apparatus and method of controlling fuel gauge in circuit mode of vehicle

A method of controlling a fuel gauge in a circuit mode of a vehicle, the method comprising:

• comparing, by a controller, a damping time with a response time, wherein the response time is a time taken for the fuel gauge to actually descend to a state ‘empty’ from a state ‘full’ due to fuel consumption of an engine;
• determining, by the controller, whether a driving mode of the vehicle is a general mode or a circuit mode;
• calculating, by the controller, a current fuel amount of the vehicle based on a change in resistance of a fuel sender when a mode of the vehicle is the general mode, and calculating, by the controller, the current fuel amount of the vehicle based on a value obtained by multiplying fuel consumption (FCO) of the engine by an FCO tuning value when the mode of the vehicle is the circuit mode;
• and
• controlling, by the controller, the fuel gauge based on the calculated current fuel amount.