Comparison
Dry stout vs Imperial stout
What is the difference between stout and imperial stout?
The short answer
Scale. A dry stout is about 4.2% ABV, light-bodied and built for drinking in pints. An imperial stout is 8–14%, dense and viscous, and is a sipping beer. The roast character is shared; almost nothing else is.
Where they overlap
They share comparable bitterness, roast, carbonation, the same style family — the boundary between them is narrower than the comparison suggests.
Side by side
| Dry stout | Imperial stout | |
|---|---|---|
| Family | Porter & stout | Porter & stout |
| Fermentation | Top-fermented (ale) | Top-fermented (ale) |
| Origin | Ireland | United Kingdom |
| Category status | Established | Established |
| Strength | 3.8–5% ABV | 8–14+% ABV |
| Bitterness (IBU) — IBU measures iso-alpha acids in the lab. It does not track perceived bitterness, which residual sweetness, body and roast all alter — compare the sensory rows below for how each actually tastes. | 25–45 IBU | 50–90 IBU |
| Colour — These are the same depth in the glass; colour is not what tells them apart. | Black, with ruby highlights at the edge — 25–40 SRM, 49–79 EBC | Opaque black — 30–40 SRM, 59–79 EBC |
| Original gravity | 1.036–1.050 | 1.075–1.115 |
| Final gravity | 1.007–1.011 | 1.018–1.030 |
| Serving temperature | 6–10°C | 12–15°C |
| Carbonation | 1.6–2.1 vol CO₂ | 1–2 vol CO₂ |
| Glassware | Nonic pint, Tulip glass | Snifter, Tasting glass |
| Clarity | opaque | opaque |
How they taste different
| Character | Dry stout | Imperial stout |
|---|---|---|
| Alcohol warmth | Not characteristic | High–Very high |
| Dryness | High–Very high | Not characteristic |
| Body | Low | Very high |
| Sweetness | Trace | Moderate–High |
| Caramel & toffee | Not characteristic | Moderate |
| Malt intensity | Moderate | Very high |
| Yeast fruitiness (esters) | Trace | Moderate |
| Chocolate & cocoa | Low | High |
| Hop aroma | None–Trace | Not characteristic |
Which should you choose?
- You want something you can drink a pint of → Dry stout
- You want a small glass of something intense → Imperial stout
An editor’s judgement about who each suits.