The chart used to determine the pepper's heat, named the Scoville Scale after its creator, American pharmacist Wilbur Scoville, assigns measurable units of spiciness to various foods. For example ...
For comparison, a habanero pepper typically hits 100,000 Scoville heat units, but Pepper X registers at 2.69 million units. Breeder and grower Ed Currie created both record-breaking peppers.