A system and method for determining a liquid level in a vessel is described. Embodiments of the system can include a liquid level measuring assembly, a user device, and a vessel. The liquid level measuring assembly can include an ultrasonic sensor assembly, a control module, and a mount body configured to place the ultrasonic sensor assembly proximate a bottom of a vessel. Typically, the system can be implemented with a vessel having a substantially cylindrical shape and including a chime. The mount body can be adapted to removably couple to the inside of the chime of the vessel.