Coffee Caffeine Calculator
Estimate the caffeine in your coffee and compare your daily total with the general adult reference.
Your estimated daily total
Brewed coffee
410 mg
103% of 400 mg
Above the general adult reference. Consider a smaller serving, fewer cups, or decaf.
- Per serving
- 205 mg
- Likely daily range
- 328-492 mg
- Drink size
- 355 ml
- Servings
- 2 per day
Coffee caffeine varies with bean, dose, grind, extraction, and shop recipe. Check a product label or ask the seller when an exact amount is available.
Estimate only. The 400 mg reference applies to most healthy adults, not everyone. Pregnancy, breastfeeding, age, medications, health conditions, and individual sensitivity can change what is appropriate.
Typical caffeine starting points
These are category estimates, not laboratory results. Coffee from different beans, brewers, cafés, and batches can vary substantially.
| Drink | Typical serving | Calculator starting point | How it scales |
|---|---|---|---|
| Brewed coffee | 237 ml / 8 fl oz | 135 mg | By drink volume |
| Drip or pour over | 237 ml / 8 fl oz | 179 mg | By drink volume |
| French press | 237 ml / 8 fl oz | 135 mg | By drink volume |
| Cold brew | 355 ml / 12 fl oz | 180 mg | By drink volume |
| Instant coffee | 237 ml / 8 fl oz | 91 mg | By drink volume |
| Decaf coffee | 237 ml / 8 fl oz | 3 mg | By drink volume |
| Espresso drinks | 1 shot | 63 mg | By number of shots |
Why caffeine estimates vary
The same menu name can represent a very different dose from one kitchen or café to another.
- Coffee doseMore ground coffee usually gives the brew more caffeine to extract.
- Serving sizeA large cup can contain much more caffeine even when it tastes less intense.
- Recipe and beansBean variety, grind, contact time, and extraction all affect the final amount.
Use the result as a reference
Health Canada recommends a maximum daily intake of 400 mg for adults 18 and over, and 300 mg for people who are pregnant, breastfeeding, or planning pregnancy. The FDA also cites 400 mg per day as an amount not generally associated with negative effects for most adults.
Coffee caffeine questions
How much caffeine is in a cup of coffee?
Health Canada lists averages of 135 mg for 237 ml of brewed coffee and 179 mg for the same amount of filter drip coffee. The actual amount can vary substantially.
Does decaf coffee contain caffeine?
Usually, yes. Health Canada lists about 3 mg in 237 ml of roasted and ground decaf coffee, while the FDA says an 8 fl oz decaf coffee typically contains 2 to 15 mg.
Is 400 mg of caffeine safe for everyone?
No single amount fits everyone. The 400 mg daily level is a general reference for most healthy adults. Sensitivity, age, pregnancy, breastfeeding, medications, and health conditions can call for a lower amount.
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