Caffeine in Coffee vs Energy Drink Calculator
Compare how much caffeine is in your coffee and your energy drink, per serving and per 100ml, then check your total daily intake against the recommended limit.
Compare Your Caffeine Intake
Choose a coffee and an energy drink, set the serving size and how many you have each day. The calculator shows which has more caffeine and how your daily total compares with the recommended limit.
Caffeine Comparison Estimator
See how coffee stacks up against an energy drink.
Understanding the Numbers
How caffeine compares between drinks
Per Serving vs Per 100ml
A small espresso is very concentrated, but a large can of energy drink can still deliver more caffeine in total. Compare both figures for the full picture.
Serving Size Matters
A 500ml can is two servings of a standard 250ml energy drink. Always use the size you actually drink.
The Daily Limit
Up to 400 mg a day is generally not a safety concern for healthy adults. Pregnant women are advised to stay within 200 mg a day.
Coffee Varies
Roast, bean type and brewing method change the caffeine content. Use the editable mg per 100ml field if you know your exact figure.
Typical Caffeine in Coffee and Energy Drinks
Approximate averages used by the calculator. Always check product labels for exact values.
| Drink | Typical Serving | Caffeine (approx.) |
|---|---|---|
| Filter / brewed coffee | 240 ml | ~95 mg (40 mg/100ml) |
| Espresso | 30 ml shot | ~63 mg (212 mg/100ml) |
| Instant coffee | 250 ml | ~75 mg (30 mg/100ml) |
| Cold brew | 350 ml | ~158 mg (45 mg/100ml) |
| Red Bull | 250 ml can | ~80 mg (32 mg/100ml) |
| Monster / Relentless | 500 ml can | ~160 mg (32 mg/100ml) |
| Celsius | 355 ml can | ~200 mg (56 mg/100ml) |
Coffee vs Energy Drink Caffeine FAQ
Answers to common questions about caffeine in coffee and energy drinks.
Per millilitre, coffee usually has more caffeine than most energy drinks. A typical mug of filter coffee contains about 95 mg, similar to a standard 250 ml can of Red Bull at about 80 mg, but large energy drink cans can contain 150 to 200 mg.
Health authorities such as the NHS and EFSA advise that up to 400 mg of caffeine a day is not a safety concern for most healthy adults. Pregnant women are advised to limit intake to 200 mg a day. Energy drinks are not recommended for children.
The calculator multiplies the caffeine concentration in milligrams per 100 ml by the serving size in millilitres divided by 100, then multiplies by the number of servings per day.
No. Caffeine in coffee varies with bean type, roast, brewing method and strength. The values are typical averages and you can enter your own mg per 100 ml for any drink.
Not automatically. To include another drink, such as tea or cola, set the coffee or energy drink field to Custom and enter its caffeine per 100 ml and serving size.