A bathtub lift assembly for a bathtub is provided. The bathtub lift assembly comprises: a bathtub frame, a lifting assembly including a vertically-extending lift post mounted to the bathtub frame and translatable between a raised configuration and at least one lowered configuration, a post actuator mounted to the bathtub frame, and a transmission assembly mounted to the bathtub frame and operatively connecting the post actuator and the vertically-extending lift post. The transmission assembly can include a ratio multiplier assembly. The bathtub lift assembly can also include a lift post rotation actuator operatively connected to the vertically-extending lift post and activable to configure the vertically-extending lift post between a loading configuration and a bathing configuration.
