An image forming apparatus equipped with an exposure device including a plurality of light emitting points, includes a photoconductor and a processor. The processor controls the light emission of each of the plurality of light emitting points of the exposure device based on the image to be formed. The processor calculates a fourth correction coefficient by changing a third correction coefficient, which is calculated based on a first correction coefficient for correcting a first physical quantity related to the exposure condition of the photoconductor by the light emitting point, and a second correction coefficient for correcting a second physical quantity related to the exposure condition of the photoconductor by the light emitting point, based on the light emission time set according to the gradation of the image to be formed, and corrects the light output of each of the plurality of light emitting points by the fourth correction coefficient.