A radiographic image capturing system for carrying out a radiographic image capturing process without pre-exposure by setting a tube voltage of a radiation source, an mAs value, types of a target and a filter that make up the radiation source, and information concerning a subject, as image capturing conditions, by an image capturing condition setting section, thereafter applying radiation from the radiation source to the subject according to the image capturing conditions, and converting radiation that has passed through the subject into a radiographic image by a radiation detector, the radiographic image capturing system comprising: an estimated exposure dose calculator configured to calculate an estimated exposure dose representing an estimated value of a dose to which the subject will be exposed by applying radiation to the subject, on basis of the image capturing conditions after the image capturing conditions have been set and before the radiographic image capturing process without pre-exposure is carried out; an exposure dose output unit configured to output, to outside, the estimated exposure dose that has been calculated; an image capturing condition adjuster configured to adjust the image capturing conditions; and an estimated exposure dose adjuster configured to adjust the estimated exposure dose, wherein, in a case where the estimated exposure dose adjuster adjusts the estimated exposure dose, the image capturing condition adjuster adjusts the image capturing conditions on the basis of the estimated exposure dose that has been adjusted, or alternatively, in a case where the image capturing condition adjuster adjusts the image capturing conditions, the estimated exposure dose adjuster adjusts the estimated exposure dose on basis of the image capturing conditions that have been adjusted, wherein the image capturing condition adjuster adjusts the image capturing conditions by changing the mAs value in a state where the tube voltage is set to a fixed value. an estimated exposure dose calculator configured to calculate an estimated exposure dose representing an estimated value of a dose to which the subject will be exposed by applying radiation to the subject, on basis of the image capturing conditions after the image capturing conditions have been set and before the radiographic image capturing process without pre-exposure is carried out; an exposure dose output unit configured to output, to outside, the estimated exposure dose that has been calculated; an image capturing condition adjuster configured to adjust the image capturing conditions; and an estimated exposure dose adjuster configured to adjust the estimated exposure dose, wherein, in a case where the estimated exposure dose adjuster adjusts the estimated exposure dose, the image capturing condition adjuster adjusts the image capturing conditions on the basis of the estimated exposure dose that has been adjusted, or alternatively, in a case where the image capturing condition adjuster adjusts the image capturing conditions, the estimated exposure dose adjuster adjusts the estimated exposure dose on basis of the image capturing conditions that have been adjusted, wherein the image capturing condition adjuster adjusts the image capturing conditions by changing the mAs value in a state where the tube voltage is set to a fixed value.