Caffeine by Brewing Method
| Drink | Serving Size | Caffeine (approx) | mg/oz |
|---|---|---|---|
| Drip / filter coffee | 8 oz (240ml) | 95–165mg | ~12–20mg |
| Pour over (V60, Chemex) | 8 oz | 80–120mg | ~10–15mg |
| French press | 8 oz | 80–135mg | ~10–17mg |
| Espresso (single) | 1 oz (30ml) | 63mg | ~63mg |
| Espresso (double) | 2 oz (60ml) | 125mg | ~63mg |
| Cold brew concentrate | 2 oz | 100–200mg | ~50–100mg |
| Cold brew RTD (diluted) | 8 oz | 100–200mg | ~12–25mg |
| AeroPress | 8 oz | 50–130mg | ~6–16mg |
| Moka pot | 2 oz | 60–130mg | ~30–65mg |
| Decaf (drip) | 8 oz | 2–15mg | ~0.25–2mg |
| Instant coffee | 8 oz | 60–100mg | ~7–12mg |
Does Dark Roast Have More Caffeine?
The short answer: No. The difference is negligible.
Roasting destroys a small amount of caffeine — so by weight, light roast technically has slightly more caffeine than dark roast. However, dark roast beans are less dense and lighter per bean. If you measure by volume (scoops), you're using more dark roast beans per scoop, which approximately cancels out the difference. The net result: roast level has almost no practical effect on caffeine in your cup.
What actually determines caffeine level: brewing method (espresso concentrates caffeine into small volume; drip dilutes it), bean species (Robusta has ~2x more caffeine than Arabica), and dose (more coffee = more caffeine, regardless of roast).
Arabica vs Robusta Caffeine
Arabica
~1.2%
caffeine by dry weight
The species used by all specialty coffee. Smoother, more complex flavor. Lower caffeine is partly why it tastes better — less bitterness from caffeine.
Robusta
~2.7%
caffeine by dry weight
Used in most commercial espresso blends and instant coffee. Harsher flavor. Naturally more caffeine — caffeine acts as a natural pesticide, so high-altitude Arabica needs less of it.
Cold Brew Caffeine — The Concentrate Confusion
Cold brew is often said to have "more caffeine than regular coffee" — this is only true of concentrate. Here's how to think about it:
Cold brew concentrate (1:5 ratio)
~100–200mg per 2oz serving
What you make at home. Very high caffeine density — meant to be diluted.
Ready-to-drink cold brew (diluted 1:2)
~100–200mg per 8oz
Most cafe cold brew is diluted concentrate. Similar to or slightly above drip coffee.
Drip coffee
~95–165mg per 8oz
Baseline for comparison.
Is Decaf Really Caffeine-Free?
No. "Decaf" means most caffeine has been removed — not all. FDA regulations allow coffee labeled decaf to retain up to 3% of original caffeine content. In practice, most decaf contains 2–15mg of caffeine per 8oz cup. That's far less than regular coffee (95–165mg), but not zero. For people with high caffeine sensitivity, this can matter.
How Much Caffeine Is Safe?
The FDA and most health authorities cite 400mg/day as the upper limit for healthy adults — roughly 4 cups of drip coffee. Pregnant individuals are typically advised to stay under 200mg/day. Individual tolerance varies significantly based on genetics, body weight, and habitual consumption. Caffeine sensitivity is not related to how much coffee you drink — it's largely genetic.
Related Guides
100% Arabica — Every Bag
All Roast coffees use specialty-grade Arabica beans — cleaner flavor, natural caffeine, no Robusta filler.
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