A conversion device comprising: - a computation processing section to acquire a plurality of types of positioning correction information conforming to a first specification and used for correcting a positioning error resulting from a satellite that transmits positioning information and a positioning error resulting from a propagation path of the positioning information, an approximate position being a positioning result, and a satellite position of the satellite that transmits the positioning information based on which the approximate position is calculated, and based on the plurality of types of positioning correction information, the approximate position, and the satellite position that have been acquired, generate a plurality of pieces of element data which are elements used for generating a plurality of types of positioning correction information conforming to a second specification, by computation; and - a conversion calculation section to generate the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data generated by the computation processing section wherein the first specification is defined by RTCM standard 10403.2 and the second specification is defined by RTCM standard 10402.3 and further comprising a correction information generation section to generate, as element data, correction information for correcting a position-dependent error which is an error resulting from a positioning position, based on the approximate position and the satellite position, wherein the conversion calculation section generates the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data generated by the computation processing section and a plurality of pieces of the element data generated by the correction information generation section and further, wherein the correction information generation section generates element data of a solid earth tide effect and element data of a phase wind-up. - a computation processing section to acquire a plurality of types of positioning correction information conforming to a first specification and used for correcting a positioning error resulting from a satellite that transmits positioning information and a positioning error resulting from a propagation path of the positioning information, an approximate position being a positioning result, and a satellite position of the satellite that transmits the positioning information based on which the approximate position is calculated, and based on the plurality of types of positioning correction information, the approximate position, and the satellite position that have been acquired, generate a plurality of pieces of element data which are elements used for generating a plurality of types of positioning correction information conforming to a second specification, by computation; and - a conversion calculation section to generate the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data generated by the computation processing section wherein the first specification is defined by RTCM standard 10403.2 and the second specification is defined by RTCM standard 10402.3 and <EOS>