Quote:
Originally Posted by rbarata
Easy but I forgot to convert the mg of the caffeine into grs of water.
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Here is an example. Say you have a 200 mg caffeine tablet dissolved in a liter of water. That is 200 mg per liter. Per the table, multiply by 0.0001 and it gives you 0.02%. If you decide you need a liter of 1% solution, you need to use 50 of those tablets per liter.
It would probably not be economical to use espresso to get that 1% solution. A 200 mg tablet is equal to 2 cups coffee (I looked online for a package label). So, you are up to 100 cups coffee to get the same caffeine. I am making the simplifying assumption that one 250 mL cup of coffee has the same caffeine as a smaller but stronger espresso.
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