Received intensity calculation device, received intensity calculation method, and storage medium using theoretical values and measured values

A first acquisition unit acquires theoretical values of received intensity of radio waves from a transmission point received at a plurality of reception points. A second acquisition unit defines a reception point associated with one of a plurality of theoretical values of received intensity acquired by the first acquisition unit as a measurement point and acquires a measured value of received intensity at the measurement point thus defined. A determination unit that determines a correction range in accordance with a difference between the measured value of received intensity acquired by the second acquisition unit and the theoretical value of received intensity at the measurement point acquired by the first acquisition unit. A correction unit corrects the theoretical value of received intensity at the reception point included in the correction range determined by the determination unit, based on the measured value of received intensity acquired by the second acquisition unit.