A self-serve drink blending device includes a blend chamber, at least one product source, a water source, an ice source, a liquid level sensor, a controller and a dispenser. The blend chamber includes a blending blade. The at least one product source is configured to deliver a volume of product to the blend chamber. The water source is configured to deliver a volume of water to the blend chamber. The ice source is configured to deliver a volume of ice to the blend chamber. The liquid level sensor is mounted to the blend chamber and configured to create a liquid level signal when contents in the blend chamber reach a predetermined level. The controller is configured to automatically calibrate the at least one product source, the water source, and the ice source based on the liquid level signal. The dispenser is arranged to dispense contents from the blend chamber.