Does A typical cup of brewed tea contains just under half as much caffeine a coffee?

That's a pretty good estimate! Here's a breakdown:

* Coffee: A typical 8-ounce cup of brewed coffee contains around 80-100 milligrams of caffeine.

* Tea: A typical 8-ounce cup of brewed black tea contains around 40-50 milligrams of caffeine.

So, a cup of tea does indeed have just under half the caffeine of a cup of coffee.

Important Note: Caffeine content varies depending on:

* Type of tea: Black tea has more caffeine than green tea, white tea, or herbal teas (which have little to no caffeine).

* Brewing time: The longer you brew tea, the more caffeine it will extract.

* Type of coffee: Darker roasts tend to have less caffeine than lighter roasts.

* Brewing method: French press or cold brew coffee generally have higher caffeine levels.

If you're sensitive to caffeine, it's always best to check the specific caffeine content of your beverage.