Lewis: How to carb count breakfast

Lewis Sherwood has had Type 1 diabetes since he was 4. Here, he shows us how to carb count for breakfast - or read his instructions below.

Carb counting is important as it helps us alter our insulin. It takes practice. If I went to a restaurant with my family, I would still need help working out my carbs. 

But, when I’m at home, my mum and dad get me to work out as much as possible. It’s easier as I can look at packets and have scales to weigh food.

I usually have a bowl of cereal for my breakfast, so I’m going to tell you how I carb count for this.


  • Put a bowl on the scales. One thing you should never do when you’re carb counting foods is put the bowl on the scales while it’s turned on because it will give the weight of the bowl, plus the cereal. If that happens, click the ‘zero’ button on the scales, or put the bowl on the scales before you turn them on.
  • Look at the back of the packet and find the carb info. On the back of my cereal, it says 76g of carbohydrate per 100g serving.
  • Take that number (for me, that’s 76g) and put it into a calculator and divide it by 100. That will tell you how much carbohydrate there is per 1g. So, for my cereal, it’ll be 0.76g.
  • Go back to your scales and pour out how much cereal you want to have. Look at how many grams it is and remember that number or write it down.
  • In your calculator, multiply the number you worked out before (0.76 for me) with the number of grams of cereal you’re having.


  • For my bowl of cereal, it was 47.12g of carbohydrate. So, I rounded this down to just 47g (if it’s above 0.5, you would round it up).
  • Then, look at your insulin to carb ratio and work out how much insulin you need to have.

About me

I'm Lewis, 12, from the West Midlands. I like to talk…a lot! I have a blog where I write about what I've been up to. Go towww.growingupwitht1d.wordpress.com

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