People are routinely surprised by caffeine numbers. The espresso that "wakes you up" has less caffeine per serving than a large drip coffee. A Monster has twice the caffeine of a Red Bull. Matcha has more caffeine than green tea by a significant margin. And that "decaf" has more caffeine than you'd think.
This is the complete reference. Every major drink category, with real caffeine content based on manufacturer data, laboratory testing, and Open Food Facts records. Bookmark this page.
Coffee drinks
Coffee caffeine content varies enormously based on brew method, bean variety, roast level, and serving size. These figures are typical values for standard commercial preparations.
| Drink | Serving size | Caffeine (mg) | Caffeine bar |
|---|---|---|---|
| Espresso (single shot) | 30ml | 63mg | |
| Espresso (double shot) | 60ml | 126mg | |
| Flat white | 180ml | 157mg | |
| Americano | 360ml | 126mg | |
| Drip / filter coffee | 355ml (12oz) | 140mg | |
| Latte (single shot) | 350ml | 63mg | |
| Cappuccino (double) | 180ml | 126mg | |
| Cold brew (concentrate) | 355ml | 200mg | |
| Decaf espresso | 30ml | ~3mg |
The espresso myth: Espresso has more caffeine per ml (about 2mg/ml) than drip coffee (~0.4mg/ml), but because you drink so little of it, a single shot has less total caffeine than a mug of filter coffee. Drinking a 12oz drip coffee is effectively having 2–3 espressos worth of caffeine.
Energy drinks
Energy drinks are often misunderstood. Their caffeine content is usually well-labelled and consistent — but serving sizes vary wildly, and people often drink multiple cans.
| Drink | Serving size | Caffeine (mg) | Caffeine bar |
|---|---|---|---|
| Red Bull (original) | 250ml | 80mg | |
| Monster (original) | 500ml | 160mg | |
| Rockstar (original) | 500ml | 160mg | |
| Celsius | 355ml | 200mg | |
| Ghost Energy | 473ml | 200mg | |
| 5-hour Energy (2oz) | 60ml | 200mg | |
| Lucozade Energy | 380ml | 46mg |
Tea
Tea caffeine is highly variable — brewing time, temperature, leaf quality, and whether you're using bags or loose leaf all affect the final concentration significantly.
| Drink | Serving size | Caffeine (mg) | Caffeine bar |
|---|---|---|---|
| Black tea (brewed 3min) | 240ml | 47mg | |
| English Breakfast (strong) | 240ml | 70mg | |
| Green tea | 240ml | 30mg | |
| Matcha (ceremonial) | 240ml | 70mg | |
| White tea | 240ml | 25mg | |
| Oolong tea | 240ml | 37mg | |
| Herbal tea (chamomile etc.) | 240ml | 0mg |
Soft drinks & other
| Drink | Serving size | Caffeine (mg) | Caffeine bar |
|---|---|---|---|
| Coca-Cola (regular) | 355ml | 34mg | |
| Diet Coke | 355ml | 46mg | |
| Pepsi | 355ml | 38mg | |
| Mountain Dew | 355ml | 54mg | |
| Dark chocolate (50g) | 50g | 25mg | |
| Pre-workout (typical) | serving (powder) | 300mg |
Why the same drink varies so much
Coffee: roast level matters less than you think
Counter-intuitively, lighter roasts have slightly more caffeine than dark roasts — caffeine degrades slightly during roasting. The bigger variable is the coffee-to-water ratio. A stronger brew (more grounds, less water) has more caffeine per ml regardless of roast.
Tea: brewing time is everything
Steeping black tea for 1 minute vs 5 minutes can roughly double caffeine content. Always-steeped bags and builder's teas brewed dark will be substantially stronger than a quick dip.
Energy drinks: serving size games
Many energy drinks present a "serving size" as half a can on the nutrition label — then sell you a full can. Always multiply by 2 if the can is 500ml but the serving size says 250ml.
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