How Much Caffeine Is In Tea? Ask The Caffeine Calculator

September 17, 2019 6 Comments

 

Caffeine Calculator

We got a great response from you about our article on caffeine in Oolong Tea.

So we started thinking...how can we make that information easier to use?

Besides in-depth info on caffeine in tea, maybe you just want a quick lookup for how much caffeine you are drinking right now! 

And can you guess what?

We just released the Eco-Cha Tea Caffeine Calculator!

Before we go into the features of the Caffeine Calculator and how it works, we just want to tell you that not all of the features have been released yet.

For the first release, we focused on 7 types of Taiwanese Tea.

So let’s dive into the new Tea Caffeine Calculator.

Tea Selection Menu

The calculator is broken down into 3 main sections: tea type, size of tea serving, and amount of caffeine in tea.

The first section is a drop down menu that lets you select the type of tea you want caffeine info for.

Caffeine Calculator Tea Selection

You can chose to see how much caffeine is in green tea, high mountain oolong tea, black tea, oriental beauty, wenshan boazhong, dong ding tea, and cold brew oolong tea.

We started with this group of teas, because Taiwan's Tea Research and Extension Station has very good data on their caffeine content. 

 

Tea Serving Size Slider

The second part of the calculator is the tea serving size slider, in ounces.

This section allows you to select from an 8, 12, 16, or 20 ounce serving. After all...how much caffeine is in a cup of tea, depends on the size of the cup. 

Caffeine Calculator Serving Size

Once you have selected the type of tea, and used the slider to select your serving size...voila…

 

Tea Caffeine Amount

Based on your selection of tea and serving size, we’ll show you the amount of caffeine in your tea. That’s it!

The data is pulled from TRES (Taiwan’s Tea Research and Extension Station). Their published data is in Chinese, but remember we’ve translated it to English here.

By using their data, we’re able to give you the precise milligram (mg) count of how much caffeine is in your tea. 

The teas in the calculator range from 26mg of caffeine per cup to 254mg of caffeine per cup and are based on ratios of 1:50 (grams/ml) of boiling water to tea leaves, steeped for 6 minutes. Cold brew was steeped for 4 hours. 

Caffeine Calculator Caffeine Per Cup

 

Caffeine Visual Slider

Below the caffeine calculation section, we’ve added a colored slider to for a visual representation of the caffeine in each selection.

This provides the same information as above, but in quick visual readout—light green for minimal caffeine (cold brew oolong, smaller servings), all the way to red for a large amount of caffeine (oriental beauty, large cups of black tea).

We added this section to display the amount of caffeine in context, from lowest on the list to the highest.

 

 Caffeine Calculator Caffeine Range

This is our favorite part of the caffeine calculator because you can easily see the amount of caffeine on a sliding scale from low to high.

 

Notes on Brewing

The caffeine values found in this calculator are based on a ratio of 3 grams of tea, steeped in boiling water for 6 minutes.

If you steep more or less tea, steep for a different amount of time, or with different temperature water, your caffeine mileage will vary. 

Furthermore, growing conditions, processing methods, and precise cultivar will all affect the amount of caffeine in your final cup of tea.

 

So, what’s next?

We know this is a small selection of the types of teas out there in the world, and you are probably curious about the caffeine in many of them.

We are already working on the next version, with more tea a more fun features! We wish we were able to release everything at once, but this development is a bit tricky, and of course we’ve got tea to source!

One of the features we want to release over the next little while will include the ability to select steep number, as caffeine in tea will vary from the first steep to the last. 

Once we release the steep number feature, we’ll be focusing on adding more and more tea to the calculator.

 

Conclusion

What do you think about the new Tea Caffeine Calculator?

If you haven’t used it, go check it out.

Like we mentioned earlier, this is a work in progress and other features are already being worked on for a future release.

A lot of these ideas come from you guys so, please, the more feedback the better.

So, what do you think about the new Eco-Cha Tea Caffeine Calculator?





6 Responses

Eco-Cha
Eco-Cha

September 20, 2019

Hi Peter ⁠— Great suggestion. Ability to select amount of tea and amount of water would be very handy; the coding will be a bit more complex, but we’ll see what we can do!

As it is now though, this is based on a ratio of tea leaves to water, so it would be 3 grams of tea leaves for 150 ml of water, or 6 grams of tea leaves for 300 ml of water, etc. We’ve coded these ratios into the calculator for each size, so it will give you an accurate picture of caffeine to size. We’re also working on adding a time selector because, of course steep time also affects the amount of caffeine extracted (and as Claire said, not everyone brews their tea for the same amount of time). Thanks again and more coming soon…!

Eco-Cha
Eco-Cha

September 20, 2019

Hi Artem ⁠— Thanks for the suggestion, we’ve just added a ml to oz conversion table to the calculator page! You’ll see it just below the calculator. For a future release we’ll see about adding a toggle that will allow you to select your preferred measurement system. Thanks again and hope this helps!

Eco-Cha
Eco-Cha

September 20, 2019

Hi Claire — Thanks for writing and not to worry! Although black tea does have a good amount of caffeine, if you’re not steeping it for six minutes with 1:50 tea to water (grams to ml), you won’t be getting that amount of caffeine. And adding all the health benefits of black tea (and how good it tastes), we think you’re doing pretty well with your Darjeeling!

Peter I
Peter I

September 18, 2019

Claire V your cup of black tea may not have that much caffeine.

Maybe the calculator can calculate based on how much tea is used instead of the amount of water used. It’s a bit confusing but i’ve heard tea on average ranges around 1 to 5% caffeine by weight. So taking 1-5% of 3 grams of tea gives you no more than 30-150 mg of caffeine even if you steep the heck out it. So for example doubling from 8 to 16 ounces won’t double the caffeine unless you double the amount of tea used.

Artem Martynovich
Artem Martynovich

September 17, 2019

Please let us use ml instead of oz. Nobody uses this stupid imperial system outside of US, we’re all sane people here.

Claire V
Claire V

September 17, 2019

Yikes! It looks like my morning twelve-ounce cup of black tea has more caffeine than a similarly sized cup of coffee (148 vs. 136 mg), though I tend to drink Darjeelings instead of Taiwanese hongcha. However, six minutes is longer than most people steep their tea. Thanks for the tool!

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