Quick take: Health Canada lists brewed coffee at about 135 mg of caffeine per 237 mL serving and brewed black or green tea at about 30 to 50 mg for the same volume. Those are averages, not universal values.
Why coffee usually has more caffeine per cup
Coffee brewing typically uses a relatively large mass of roasted seed material compared with the amount of tea leaf used for a cup. Coffee species also accumulate caffeine differently from tea plants. The result is that a normal brewed coffee usually lands higher than a normal brewed black or green tea serving.
Why tea still varies
Tea type, leaf amount, water temperature and steep time all affect extraction. A strong black tea steeped for a long time can contain more caffeine than a lightly brewed green tea.
Herbal infusions are a separate category. Many contain no tea plant at all and may contain little or no caffeine unless another caffeinated ingredient is present.
Why this is useful for Urban Calm
Urban Calm sells both coffee and loose-leaf tea, so the Learning Centre can help customers choose based on the beverage they actually want rather than treating caffeine as a good-or-bad label.
Coffee is the higher-caffeine default. Tea can offer a lower-caffeine route depending on the blend. The exact product still matters.
The useful takeaway
Coffee and tea both contain caffeine, but typical brewed coffee starts higher. Use serving size and the actual product instead of assuming every tea is low and every coffee is identical.
For more context, see How Much Caffeine Is in Coffee?.
Source
Health Canada: Caffeine in Foods
Shop Urban Calm Specialty Coffee or explore our loose leaf teas.
