What Is the Scoville Scale?

The Scoville scale measures the spiciness of chili peppers and other substances, expressed in Scoville Heat Units (SHU). It tracks the concentration of capsaicinoids, the compounds that create the burning sensation. Capsaicin is the most abundant. The higher the SHU, the hotter the pepper or sauce, with values ranging from 0 SHU (bell pepper) to 16,000,000 SHU (pure capsaicin).

The scale is named after its creator, Wilbur Scoville, an American pharmacist who developed the original test in 1912. His method involved a panel of five tasters who sampled diluted pepper extract until the heat disappeared, with each dilution step increasing the SHU count.

The Range of the Scoville Scale

The Scoville scale breaks into five general heat tiers:

• Mild (0 to 2,500 SHU): Bell peppers, pepperoncini, and banana peppers. No heat to gentle warmth.
• Medium (2,500 to 30,000 SHU): Jalapeño (2,500 to 8,000 SHU) and serrano (10,000 to 23,000 SHU). The kick is noticeable and immediate.
• Hot (30,000 to 100,000 SHU): Cayenne (30,000 to 50,000 SHU) and bird's eye chili (50,000 to 100,000 SHU)
• Extra hot (100,000 to 300,000 SHU): Habanero (100,000 to 350,000 SHU), and scotch bonnet (100,000 to 350,000 SHU).
• Extreme (300,000+ SHU): Ghost pepper (855,000 to 1,041,000 SHU), Carolina Reaper (1,400,000 to 2,200,000 SHU), and Pepper X (2,693,000 SHU, Guinness confirmed). Peppers that demand serious respect.

Scoville Scale of All Peppers

Here's a full reference list of peppers arranged from mildest to hottest:

• Bell Pepper: 0 SHU
• Pepperoncini: 100 to 500 SHU
• Banana Pepper: 0 to 500 SHU
• Anaheim: 500 to 2,500 SHU
• Poblano: 1,000 to 1,500 SHU
• Jalapeño: 2,500 to 8,000 SHU
• Serrano: 8,000 to 22,000 SHU
• Cayenne: 30,000 to 50,000 SHU
• Bird's Eye Chili (Thai Chili): 50,000 to 100,000 SHU
• Celestial Chili Pepper (Vietnamese): 100,000 to 250,000 SHU
• Scotch Bonnet: 100,000 to 350,000 SHU
• Habanero: 100,000 to 350,000 SHU
• Ghost Pepper (Bhut Jolokia): 855,000 to 1,041,000 SHU
• Trinidad Scorpion: 1,200,000 to 2,000,000 SHU
• Carolina Reaper: 1,400,000 to 2,200,000 SHU
• Pepper X: 2,693,000 SHU (Guinness confirmed)
• Pure Capsaicin: 15,000,000 - 16,000,000 SHU

How Is the Scoville Scale Applied to Hot Sauce Specifically?

The Scoville scale measures the heat level of hot sauces by quantifying the amount of capsaicin they contain. The higher the SHU rating, the spicier the hot sauce. A sauce's final SHU almost always falls below the raw SHU of its base pepper, because other ingredients dilute the capsaicin concentration. For example, fresh jalapeños range from 2,500–8,000 SHU, while jalapeño-based sauces typically drop to 500–3,000 SHU after dilution with vinegar, water, and other ingredients.

Most hot sauce makers don't lab-test their finished sauce for SHU. They estimate the rating based on the peppers used and their concentration in the recipe. Only challenge-grade sauces (Da Bomb, Mad Dog, The Last Dab) invest in HPLC testing. For example, Heatonist uses a proprietary 1-to-10 scale, and HotSauce uses a 1-to-5 flame rating.

So what role does capsaicin play when a sauce has vinegar, sugar, and other ingredients blended in?

Capsaicin is the active compound that triggers TRPV1 heat receptors on the tongue (J Gen Physiol. 2005). In a finished hot sauce, three factors push the final SHU below the raw pepper's rating:

• Dilution. Vinegar, water, fruit, and sugar reduce capsaicin concentration. A jalapeño pepper measures 2,500 to 8,000 SHU raw, but a jalapeño-based sauce often drops to 500 to 3,000 SHU after blending with vinegar and other ingredients.
• Vinegar content. Vinegar is the first listed ingredient in many American hot sauces (Tabasco, Frank's, Louisiana). A higher vinegar ratio means a lower capsaicin percentage by volume.
• Lacto-fermentation. Fermented sauces like Tabasco (aged for up to 3 years) experience a drop in pH during fermentation. Lower pH softens perceived heat on the palate, even though capsaicin content stays similar. Fermented sauces deliver a "slower burn" compared to the sharp, immediate hit of a fresh-pepper sauce.

How does the SHU number on a bottle compare to the pepper listed on the label?

Pepper SHU refers to the capsaicin concentration of the raw pepper at harvest. Sauce SHU refers to the capsaicin concentration of the finished product after all ingredients are blended. The gap can be wide: a habanero ranges from 100,000 to 577,000 SHU raw, but a habanero hot sauce with heavy fruit and vinegar dilution may test at 5,000 to 50,000 SHU. Labels often highlight the pepper name ("Habanero Hot Sauce") without specifying the sauce's actual SHU. So you should treat the pepper name as a flavor indicator and the SHU number as the heat indicator.

What Are the Scoville Rankings for the Most Popular Hot Sauce Brands?

Mild sauces like Frank's RedHot sit near 450 SHU, while concentrated extract products like Mad Dog 357 Plutonium No.9 reach 9,000,000 SHU. Every popular brand falls between those two points. The range from 450 SHU to 9,000,000 SHU covers everything from everyday table sauces to food-additive-grade extracts. Most SHU values below are manufacturer-reported estimates unless lab-tested.

The table below ranks 26 popular hot sauces from mildest to hottest:

There's a reason mild and medium sauces fill most of the shelf space because they pair with daily meals without drowning out the food. The US hot sauce market grew to over $4.5 billion in annual sales in 2025, and sauces under 10,000 SHU account for the bulk of retail volume. They work as everyday condiments, poured on eggs, rice, pizza, and sandwiches. 

That's also where the pepper base matters. Most American tabletop sauces (Frank's, Tabasco, Cholula, Louisiana) use cayenne or tabasco peppers that end up at under 5,000 SHU in the finished sauce. CHIN-SU chili sauce uses celestial chili pepper, which measures 100,000 to 250,000 SHU on the Scoville scale. The finished sauce sits at 1,500 to 2,000 SHU because charcoal grilling and fermented garlic processing tame that raw heat into a rounder, more layered flavor. So while CHIN-SU starts from a hotter pepper than most American sauces, the final product stays in mild territory, right where everyday cooking feels comfortable.

Scoville Ranking of All CHIN-SU Hot Sauce Products

CHIN-SU produces three hot sauce varieties, all of which use celestial chili pepper (ớt chỉ thiên) as the primary pepper. This chili is native to the mountainous provinces of Northern Vietnam, where it grows wild in tropical climates. It has an elongated shape, bright red color, and an SHU range of 100,000 to 250,000, making it one of the spicier peppers in Vietnamese cooking. The finished sauces fall in the mild range, between 1,500 and 2,000 SHU on the Scoville scale.

• CHIN-SU Chili Sauce is the flagship. It's made from charcoal-grilled celestial chili pepper blended with fermented garlic on a vinegar base. It falls in the medium-hot range at 1,500 to 2,000 SHU.
• CHIN-SU Sriracha Chili Sauce uses the same celestial chili pepper base in a sriracha-style format with a thicker consistency. It falls within the medium range, at 1,500 to 2,000 SHU.
• CHIN-SU Sriracha Chili Sauce for Pho is formulated for Vietnamese pho and features a flavor profile tuned for broth-based dishes. It falls within the medium range, at 1,500 to 2,000 SHU.

Why does the finished SHU sit so far below the raw pepper's 100,000-250,000 SHU range? Charcoal grilling caramelizes the pepper's surface sugars, adding smoky depth without stripping away capsaicin. Fermented garlic, vinegar, and other ingredients reduce capsaicin concentration per milliliter. Yet the flavor architecture keeps the sauce feeling spicier than its SHU alone suggests. When supporting flavors like charcoal smoke and fermented garlic amplify the perception of spice, that's the "flavor-forward heat" effect. A sauce with lower SHU but deeper complexity often feels spicier than a simple high-SHU extract.

How Do You Choose a Hot Sauce by Scoville Level?

Match the sauce's SHU range to your daily eating habits. If you add hot sauce to rice, eggs, and noodles without thinking, a sauce in the 1,000-5,000 SHU range handles that routine well. That's your starting point.

Daily hot sauce users tend to gravitate toward the medium tier (1,000 to 5,000 SHU) because these sauces add heat without masking the flavor of food. Sriracha (1,000 to 2,500 SHU), Cholula (3,600 SHU), and Tabasco (2,500 to 5,000 SHU) all sit in this zone. For Southeast Asian dishes like pho, rice plates, and stir-fries, celestial chili-based sauces like CHIN-SU offer a step up to medium-hot, which suits palates accustomed to Thai and Vietnamese heat profiles.

Heat tolerance doesn't stay fixed, either. With consistent use, many regular hot‑sauce users report increased spice tolerance over several months. Someone who starts at Mild (under 1,000 SHU) may reach for Medium (1,000 to 5,000 SHU) within a few months. Follow the practical rule: when your current sauce no longer gives a noticeable kick, move up one tier, not two. Jumping two tiers at once usually means an unpleasant surprise rather than a fun one.

You should match the heat to the food, which also makes a real difference in how much you enjoy the sauce. 

• Mild (0 to 2,500 SHU) range hot sauce works well for breakfast eggs, grilled cheese sandwiches, and children's meals where flavor matters more than heat.
• Medium (2,500 to 30,000 SHU) range hot sauce is suitable for tacos, wings, pizza, noodle soups, and fried rice.
• Hot (30,000 to 100,000 SHU) range hot sauce is best suited to marinades, stews, chili con carne, and stir-fries, where the heat gets distributed through cooking.
• Extra-hot (100,000 to 300,000 SHU) hot sauce works well for dipping sauces, challenge wings, and single-drop additions to finished dishes, where a little goes a long way.
• Extreme (300,000+ SHU) range hot sauce is strictly for the brave, my friends. Think challenge sauces, tiny dabs on a toothpick, or a single drop stirred into an entire pot of chili. These sauces demand serious respect and even more serious ventilation.

Does a Higher Scoville Number Always Mean a Better Hot Sauce?

No. A higher Scoville number measures more capsaicin, but it doesn't measure flavor, balance, or how well a sauce pairs with food.

SHU is a single-axis measurement. It tracks capsaicin concentration only. The sauces rated highest on the Scoville scale, such as The Source at 7,000,000 SHU and Mad Dog Plutonium at 9,000,000 SHU, are sold as food additives rather than condiments. They're too concentrated to eat directly. The most popular sauces in the US all sit under 5,000 SHU because they balance heat with flavor depth. Extract-based sauces often produce a metallic, bitter taste that pepper-based sauces at the same SHU don't carry. Heat without flavor is a novelty. Heat with flavor is a condiment you'll use every day.

Is the Scoville Scale the Same as the "Hot Sauce Heat Scale" Listed on Bottles?

Not exactly. The Scoville scale measures capsaicin in SHU, while the heat scales printed on most bottles (1 to 5 flames, 1 to 10 ratings) are simplified brand-specific systems.

For example, HotSauce uses a 1-to-5 flame system, while Heatonist uses a proprietary 1-to-10 scale. These systems show roughly where a sauce falls relative to other sauces in that brand's lineup, but the numbers don't convert directly to SHU. A "3 out of 5 flames" from one brand might equal 5,000 SHU, while another brand's "3 out of 5" might equal 50,000 SHU. When you're comparing heat across different brands, SHU is the only common denominator. If a bottle only shows flames or a number scale with no SHU listed, check the pepper type and search for that pepper's typical range on the Scoville scale.

Now you know the full picture. The Scoville scale ranges from 0 SHU (bell pepper) to 16,000,000 SHU (pure capsaicin), and most of the hot sauces you actually reach for at dinner fall between 450 and 5,000 SHU. That mild-to-medium range is where flavor and heat coexist without one overpowering the other. CHIN-SU chili sauce lands at 1,500 to 2,000 SHU, built on celestial chili, charcoal-grilled heat, and fermented garlic depth. It's the kind of sauce you can put on eggs in the morning, stir into noodle soup at lunch, and drizzle over grilled chicken at dinner without ever reaching for a glass of milk. Find CHIN-SU at chinsu.com.