Answer: Scoville Scale
Although we can use colorful language to describe how hot a pepper is, the measurement (subjective assessment) of the spicy heat of chili peppers is measured on the Scoville scale, named after the inventor, the American pharmacist Wilbur Scoville, who invented the spicy scale in 1
The full name of the procedure used to determine the Scoville rating is known as the Scoville organoleptic test in which an exact weight of a particular pepper variety, completely dried, is dissolved in alcohol around the heat components (the capsaicinoids) to extract. The extracted capsaicinoids are then diluted in a solution of sugar water and given to taste testers that rank the solution. Although the scale is used on a large scale, it is precisely this method, the human taste element, that is criticized as a weakness. Different tests using the same solutions can produce taste testers with a difference margin of up to 50 percent.
That said, the bowl has been around for a long time and is still widely used. The Scoville scaling value for bell peppers ranges from 0-100 for non-spicy bell peppers such as bell peppers to 1,000-10,000 for varieties of regular bell peppers such as jalapenos, all the way up to 800,000. 3,200,000 for ultra-powerful chili peppers that are selectively seasoned to be spicy such as Pepper X, Carolina Reapers, and Dragon's Breath.