🍺 Beer IBU Guide

Understand International Bitterness Units (IBU) — what they mean, how they compare across beer styles, and how to estimate IBU from your homebrew recipe.

IBU value

Beer colour / OG (affects balance)

Homebrew IBU Estimator (Tinseth Formula)

Hop weight (grams)

Alpha acid % (AA%)

Boil time (minutes)

Batch volume (litres)

Original Gravity (OG)

IBU by Beer Style

Style	IBU range	Bitterness perception
Hefeweizen / Witbier	8–15	Almost none — barely perceptible bitterness
Berliner Weisse / Gose	4–8	None — acidity dominates, not bitterness
Mild Ale	10–20	Slight — malt-forward, background bitterness only
American Lager	8–15	Very low — crisp, clean, almost no bitterness
Blonde Ale / Kölsch	15–25	Low — light hop flavour, gentle finish
Amber Ale / Märzen	20–35	Moderate — balanced, malt sweetness with hop balance
Pale Ale (English)	25–40	Medium — bitterness noticeable but balanced
American Pale Ale (APA)	30–50	Medium — citrus/piney hops upfront
India Pale Ale (IPA)	40–70	High — bitterness is a feature, not a flaw
West Coast IPA	50–70	High — clean resinous bitterness
Double IPA (DIPA)	60–100	Very high — intense, can be harsh
Dry-hopped / Hazy IPA (NEIPA)	25–45	Low–medium — hop aroma is the point, not bitterness
Stout / Porter	25–45	Medium — roast bitterness, not hop bitterness
Imperial Stout	50–90	High — but malt body counters it
Barleywine	50–100	Very high — massive malt provides balance

Common Hop Varieties

🌿 Cascade (US)

8–9% AA. Citrus, grapefruit, floral. The classic American craft hop. Used in the original Sierra Nevada Pale Ale. Versatile — bittering and aroma.

🌿 Centennial (US)

9–11% AA. Floral, citrus, lemony. More intense than Cascade. Excellent dry-hop character. Common in IPAs.

🌿 Chinook (US)

11–14% AA. Pine, spice, slight citrus. High alpha — good bittering hop. Piney resin character loved in West Coast IPAs.

🌿 Citra (US)

11–13% AA. Intense tropical fruit, lime, passion fruit. Modern favourite for NEIPAs and hazy beers. Very aromatic at low additions.

🌿 Mosaic (US)

11–13% AA. Complex — blueberry, tangerine, tropical, herbal. Very popular in modern IPAs. Blends well with Citra.

🌿 Fuggle (UK)

3–5% AA. Earthy, woody, mild fruit. Traditional English hop. Used in bitters, milds, porters. Low alpha means bittering use is expensive.

🌿 Hallertau Mittelfrueh (DE)

3–5% AA. Spicy, herbal, mild floral. Classic German noble hop. Essential for lagers, Märzen, Hefeweizen.

🌿 Saaz (CZ)

2–5% AA. Soft spice, earthy, slightly herbal. The defining hop of Czech Pilsner. Noble, subtle bitterness.

⚖️ IBU vs perceived bitterness: IBU measures isomerised alpha acid concentration — but perceived bitterness depends on malt sweetness (OG), residual sugar, carbonation, and serving temperature. A 60 IBU Imperial Stout can taste less bitter than a 30 IBU session IPA because the massive malt body provides balance. IBU alone doesn't tell the whole story.

🌡️ Dry hopping: Adding hops after fermentation (dry hopping) contributes aroma and flavour but very few IBUs — only the tiny amount of alpha acids that dissolve at room temperature. Modern hazy/NEIPA beers may use massive dry hop additions (200–400g per 20L) for intense tropical aroma with moderate bitterness.