A sensing apparatus for determining a pen input point includes a sensing loop unit, including loops, to output a first signal from a pen signal, wherein each loop includes two sub-loops separated by a distance; an area determination loop unit including at least one loop to output a second signal from the pen signal; and a controller to determine input point candidates based on the first signal and determine the input point from the input point candidates based on the second signal, wherein the two sub-loops are in series, wherein one sub-loop of the two sub-loops is disposed inside of an area in which one loop of the area determination loop unit is disposed and another sub-loop of the two sub-loops is disposed outside of the area in which the one loop is disposed, and wherein each loop of the sensing loop unit determines the candidates of the input point.