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How Much Blood Can You Donate (Based on Your Weight)?

Giving blood is a remarkable thing.

If people were more aware of the extent to which blood donation saves lives on a daily basis – there would probably be a much longer queue of people signing up to donate.  

Raising awareness around the power of blood donation is vital. And, at Medical Travel Compared, we’re only too aware of its importance for people with pre-existing medical conditions – whether that’s those living with blood disorders, or even people who are still alive thanks to blood transfusions during emergency surgery.

So, we created an online tool specifically designed to help people get a better understanding of their own blood and its remarkable lifesaving potential.

Simply enter your weight and start learning about You & Your Extraordinary Blood.



How Much Blood Is In the Human Body?

Once you type in your weight, you’ll find out approximately how much blood is in your body – in pints.

This volume is calculated on the basis that the amount of blood in the human body is generally equivalent to 7% of overall body weight.

The tool also calculates the number of red blood cells, white blood cells and platelets that make up the number of pints of blood in your body.

So, if biology was your favourite subject at school – then you’ve certainly come to the right place.

How much blood do you give in a typical donation?

Imagine ordering a Grande-sized coffee from Starbucks.

Did you know that the contents of that cup are almost exactly the amount of blood you’d give during a standard donation?

Everyone in the UK – whether you’re male or female – gives the same amount in a typical donation. 470ml (or about 1 imperial pint) is the standard amount here in the UK.

The only difference between male and female donors is how often you donate.

How long between blood donations?

Every typical blood donor can donate at least as often as every 16 weeks.

This is because blood banks need blood that is fully replenished. So while the plasma in your blood (the clear liquid that your blood cells travel around in) recovers in just 24-48 hours, it’s the red blood cells that take the time to build back up.

Males typically recover their red blood cells more quickly than females, which is why males can usually donate more times (every 12 weeks) in a year than females (every 16 weeks).

What is donated blood used for?

Once the tool calculates the number of pints of blood in your body based your weight, you can find out how those pints are used.

According to the NHS Blood and Transplant service:

  • 67% is used to treat medical conditions and blood disorders.
  • 27% is used in surgery, including cardiac surgery and emergency surgery.
  • 6% is used to treat blood loss after childbirth.

So, based on this information – you’ll see exactly what proportion of your yearly donation is used for various different forms of good.

And, while you’re taking all this information in, the tool is keeping track of each and every second you spend on the page. That’s because with every second that passes, somebody, somewhere in the world, has had their life saved thanks to blood donation.

And, you can get an idea of how this works – in real-time.

Now, that’s truly remarkable stuff.

Why not take a look at the tool for yourself today? After all, you only need to type in your weight and you’re good to go.

Or, you can find out more about blood donation and what you can do to help here.

Written by Daniel Wright.

Daniel is a copywriter at Medical Travel Compared. He writes about travel and health, and is passionate about raising awareness for charitable causes.

Published on 18th September 2018.

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