The Scoville Scale is a measure of the spiciness of a chili pepper or other spicy food. It was created by Wilbur Scoville in 1912 as a way to quantify the heat level of chili peppers.
The Scoville Scale measures the concentration of capsaicin, the compound responsible for the heat in chili peppers, in units of Scoville Heat Units (SHU). The higher the number of SHU, the hotter the pepper. For example, a bell pepper has a Scoville rating of 0 SHU, while a jalapeno pepper ranges from 2,500 to 8,000 SHU, and a habanero pepper can range from 100,000 to 350,000 SHU.
The Scoville Scale is still widely used today as a standard measure of the heat level in chili peppers, and is an important factor to consider when cooking with or consuming spicy foods.