Understanding the Scoville Scale: Pepper Heat Levels Explained


The Scoville scale, created by American pharmacist Wilbur Scoville in 1912, measures the spiciness of chili peppers and other substances in Scoville Heat Units (SHU). The heat level is determined by the concentration of capsaicinoids, the compounds that create the sensation of heat.

To put these rating numbers into perspective, heat tiers are frequently compared against a standard Jalapeño, which sits at an average reference baseline of 5,000 SHU.

Wilbur Scoville, creator of the Scoville heat scale, as a young man with a mustache

Here is a general heat range within the Scoville scale:

Sweet: 0 – 500 SHU

  • Heat Level: Virtually non-existent. Flavors in this range are crisp, sweet, or savory with no detectable bite or burn.
  • Jalapeño Comparison: 0 to 1/10th the heat of a Jalapeño (0x – 0.1x).

Mild: 500 – 2,500 SHU

  • Heat Level: A gentle, subtle warmth. It enhances culinary dishes with a slight glow without causing discomfort or lingering heat on the tongue.
  • Jalapeño Comparison: 1/10th to 1/2 as hot as a Jalapeño (0.1x – 0.5x).

Medium: 2,500 – 30,000 SHU

  • Heat Level: A noticeable, lively kick. It delivers an approachable warmth that elevates everyday food and provides an enjoyable, moderate bite for most palates.
  • Jalapeño Comparison: Equal to 1 to 6 times hotter than a Jalapeño (1x – 6x).

Hot: 30,000 – 100,000 SHU

  • Heat Level: A sharp, stinging burn that spreads quickly and lingers on the palate. This range delivers a strong, fiery profile that requires a established tolerance for spice.
  • Jalapeño Comparison: 6 to 20 times hotter than a Jalapeño (6x – 20x).

Extra Hot: 100,000 – 500,000 SHU

  • Heat Level: An intense, rapid-onset burn. Heat at this tier triggers physical reactions like facial sweating or watery eyes, and requires genuine caution during preparation and tasting.
  • Jalapeño Comparison: 20 to 100 times hotter than a Jalapeño (20x – 100x).

Superhot: 500,000 – 1,500,000 SHU

  • Heat Level: An overwhelming, searing heat that dominates the mouth. The burn builds rapidly, lasts for extended periods, and can cause an intense rush of endorphins or digestive discomfort for the uninitiated.
  • Jalapeño Comparison: 100 to 300 times hotter than a Jalapeño (100x – 300x).

Elite Superhot: 1,500,000+ SHU

  • Heat Level: The absolute peak of capsaicin concentration. Heat at this tier feels explosive and extreme, capable of causing localized pain, hiccups, body-wide sweating, and temporary palate numbness. Protective wear is often recommended when handling substances at this tier.
  • Jalapeño Comparison: 300 to over 500 times hotter than a Jalapeño (300x+).