An adjustable kettlebell device comprising a solid right circular frustum as a base, a post, a sleeve, one or more weight plates, one or more quick release clamps, and a removable handle. The post has an outer diameter compatible with standard weights, and a sleeve that slides over the post has an outer diameter compatible with Olympic weights. The handle is configured to facilitate an addition/removal of the weight plates, and may be swapped with different sized handles for use with different sized hands.