How Much Caffeine’s In Your Coffee?

Cutting back on caffeine is an effective way to help lower a high blood pressure. But according to the British Coffee Association, one in two people find it difficult to estimate how much caffeine they consume each day due to the different types of coffee and variety of cup sizes available.

While many people think a standard cup of coffee holds 200-250 millilitres, for example, it actually holds 125 millilitres. Guidelines suggest that healthy adults can safely consume 400 mg of caffeine a day which is equal to 4 to 5 cups providing 125ml coffee – but if you have your coffee in a larger mug, you may need to cut back. If you have hypertension, your doctor may suggest you cut back, and if you are a pregnant women are should limit your intake to no more than 200 mg of caffeine from all sources.

How do you know if you’ve reached your daily limit?

Mathematician and stand-up comedian Matt Parker says, ‘I find it strange that people have a pretty good idea of what a standard alcoholic drink is, and can use that to control their alcohol intake, but very few people know what a standard coffee beverage is. With so many different ways to enjoy coffee, all with different amounts of caffeine, it’s hard to keep track of what you’re ordering and how much caffeine you’re ingesting.’ Matt helps to explain the numbers in a new video called, Are you caffeine confused? Says Matt, ‘ I hope this video clears up the confusion about how much caffeine is in various drinks and helps to explain the current guidance on how much caffeine we can safely consume through coffee a day.’

For more information, see, How Caffeine Affects Blood Pressure.

For my review of caffeine shampoos, click here.

Image credit: dalli /shutterstock; YouTube video: British Coffee Association

About DrSarahBrewer

Dr Sarah Brewer MSc (Nutr Med), MA (Cantab), MB, BChir, RNutr, MBANT, CNHC qualified from Cambridge University with degrees in Natural Sciences, Medicine and Surgery. After working in general practice, she gained a master's degree in nutritional medicine from the University of Surrey. Sarah is a registered Medical Doctor, a registered Nutritionist and a registered Nutritional Therapist. She is an award winning author of over 60 popular self-help books and a columnist for Prima magazine.

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8 thoughts on “How Much Caffeine’s In Your Coffee?

  • Joana

    Great article, so i am drinking 1-2 cups of filtered coffee a day, meaning i am under 400mg of a daily intake…:) Good to know! Now i also understand why in Spain people easily have 3 double expresso a day and apparently it is absolutely fine…:) well they do have 2-3 glasses of wine daily as well, but they they do drink it kind of like water…:) What is a daily wine allowance? 🙂
    I spent a lot of time in Spain last year, and was surprised with the fact how many old people in their 80-90’s are out having a beverage in the cafe especially on sundays. It is interesting to see how different cultures consume different things.

  • Elektra

    Interesting article! I love my coffee but never was really paying attention to how much caffeine I consume. I need to check it now. My blood pressure is rather good but coming closer to 40’s I think I need to start caring more about my health. Thanks for the useful information!

  • Chris

    I was unaware actually of thinking about there being a maximum amount of caffeine you can consume or should consume in one day. The breakdown comparison in Matt’s video has some great and beneficial information to understanding the various caffeine levels and everyone who enjoys drinking coffee should know and watch this video. Thank you very much, Sarah, for sharing this with me. It’s always nice to learn something new every day.

  • Constantin Sap

    I love Coffee and I honestly didn’t know how much caffeine I consume a day. And what’s even worst I never thought about this aspect of coffee. I usually have 2 cups of coffee a day and one of them must be an espresso. I am not worried about my blood presure yet being in my 30’s but I am a bit dissapointed that we are not better educated in this matter.
    Thanks for the information , I found it very useful!