Abstract: The present disclosure relates to apparatuses and methods for weighing contents of a storage tank. One apparatus for weighing contents of a storage tank includes a load cell and a storage tank. The apparatus further includes a first plate removably attached to the storage tank. The apparatus additionally includes one or more compression springs disposed below and supporting the first plate. Still further, the apparatus includes a platform that includes a second plate, between the first plate and the storage tank, and one or more legs. The second plate engages the load cell. Each leg corresponds to one of the compression springs. Each leg extends from the second plate through a through-hole in the first plate and through a corresponding compression spring to a corresponding foot that supports the corresponding compression spring. The storage tank and the first plate are movable relative to the load cell and the platform.