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How Hot? The sizzling secrets of the Scoville Scale

How Hot? The sizzling secrets of the Scoville Scale

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For all you heat-seekers and fire-eaters out there, this one's for you! We're delving into the sizzling world of chili peppers and exploring the ins and outs of the Scoville Scale. So, buckle up, and prepare to embark on a spicy journey filled with history, chemistry, and, of course, heat!

The Birth of the Scoville Scale

Wilbur Scoville, a pharmacist, was the mastermind behind the Scoville Scale. In 1912, he developed the Scoville Organoleptic Test, which laid the foundation for the modern heat-measuring scale we know and love today (1). Wilbur sought a reliable method to measure the pungency of chili peppers, and boy, did he deliver!

The Old-School Scoville Test

The original Scoville test was a surprisingly simple affair. It involved diluting a chili pepper extract in sugar water until a panel of trained taste testers could no longer detect the heat (2). Each dilution represented a Scoville Heat Unit (SHU). The more dilutions needed, the spicier the pepper and the higher the SHU!

So, let's say a pepper required 5,000 dilutions to make the heat undetectable. That pepper would clock in at a whopping 5,000 SHUs. Talk about a spicy ride!

The 21st Century Upgrade

Although Wilbur Scoville's method was effective, it was also subjective and time-consuming. Enter High-Performance Liquid Chromatography (HPLC), a modern, more accurate technique to measure chili pepper heat (3). HPLC identifies the capsaicinoids (the chemical compounds responsible for the heat) and calculates the amount present in the pepper, providing a more consistent result.

Despite the technological advancements, we still use the Scoville Scale to express these measurements. The HPLC results are converted into SHUs, keeping the Scoville legacy alive and well (4).

A World of Heat

To give you an idea of the Scoville Scale's vast range, let's take a look at some popular peppers:

  • Bell pepper: 0 SHU (as mild as they come)
  • Jalapeño: 2,500–8,000 SHU (a classic crowd-pleaser)
  • Habanero: 100,000–350,000 SHU (not for the faint-hearted)
  • Carolina Reaper: 1,400,000–2,200,000 SHU (the reigning heavyweight champ) (5)
Scoville Scale Chillisauce


So, there you have it, folks! The Scoville Scale has come a long way since its inception over a century ago, and it continues to set our taste buds ablaze. Whether you're a chili connoisseur or just dipping your toes into the fiery world of spicy foods, the Scoville Scale is your guide to the heat spectrum. Stay spicy, my friends! - Flamin J', from the Some Like It Hot Team.


  1. Scoville, W. L. (1912). Note on Capsicums. Journal of the American Pharmaceutical Association, 1(5), 453-454. doi:10.1002/jps.3080010520
  2. Govindarajan, V. S. (1986). Capsicum — Production, Technology, Chemistry, and Quality. Part II. Processed Products, Standards, World Production and Trade. Critical Reviews in Food Science and Nutrition, 23(3), 207-288. doi:10.1080/10408398609527410
  3. Todd, P. H., & Bensinger, M. G