Abstract: The embodiments of the Castable Depth Finding Device are comprised of a lower body, a lower cavity, an upper body, an upper cavity, a hollow tube, an arch, a fishing line hole, a body neck, a water emptying port, a calibrated scale, a weight, a left lower member, a right lower member, a platform, and a pin. The lower body is constructed of a transparent material so internal contents can be viewed. The lower cavity is formed by the lower body and is located inside of lower body. The upper body forms the upper cavity and is located inside of upper body. Upper cavity is open to lower cavity. The castable depth finding device can be tied onto a fishing line or a string. It can also be clipped onto a line or onto a fishing lure with a clip or a swivel.