PROBLEM TO BE SOLVED: To provide an electronic device and a measuring system that can stably measure body fat percentage with high reliability and can be compact in size.SOLUTION: A smartphone 1 comprises: an atmospheric pressure sensor 18 that measures a water pressure value at a predetermined position under a water surface and a controller 10 that calculates a volume of a bathing person under the water surface during bathing on the basis of a water pressure value before bathing and a water pressure value during bathing and calculates a body density under the water surface on the basis of the volume of the bathing person under the water surface and weight under the water surface.
