"How do you calculate blood alcohol levels?"

Promille - what is it?

• Just like "percent", "per mille" is a percentage in a very general form.
• The term "per mille" arose from the desire to be able to specify even smaller percentages in a handy form.
• "Percent" means - like the one from the Latin The original name says it all - proportion per hundred. For example, 20% means that 20 parts should be taken out of 100 parts. Accordingly, you can also write 20/100 for 20%.
• Even with "Promille", the description is already in the word, because "mille" has "thousand" as a German translation. In other words, per mille is a fraction per thousand. So 2% o simply means 2 parts of 1000 parts. Accordingly, you can also write 2/1000 for 2% o.
• For notation: If you do not have a formula editor or special characters, just add a small "o" to the percent sign (above the "5" for per mille). This small zero should correspond to the thousand, i.e. one zero more than 100.
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Percent and per mille - the math expert explains the difference

Percent and per mille - most of these two terms are already floating around in ...

This is how per mille is calculated - actually quite simple

• Who the basics of Percentage calculation has understood to some extent, it is also very easy to calculate per mil. However, they "work" with 1000 instead of 100.
• As a reminder: If you want to calculate p% from a base value, then simply calculate p / 100 x base value, regardless of whether you do this on the calculator or do it "on foot" with paper and pencil.
• Per mille calculations are correspondingly simple. If you want to have p% o calculated from a basic value, work on the task as follows: p / 1000 x basic value.

Per mille calculation - an example

Here is an example that again leads to the topic of alcohol: How much alcohol does one have in the blood at 0.5% o?

1. In this task, the basic value, namely the blood volume in the human body, is initially unknown. However, this information can easily be obtained in times of the Internet, namely 4-6 l. For the example we assume 5 l as the mean value, people are known to be different. Since 0.5 per mille is likely to be a small amount, it is best to convert the basic value into milliliters (ml): 5 l = 5000 ml.
2. One calculates: 0.5% o of 5000 ml = 0.5 / 1000 x 5000 ml = 2.5 ml. An average person has about 2.5 ml of pure alcohol in their blood at 0.5% o.

But be careful: When you actually have this amount in your blood, it is simply not possible to tell, because alcohol is absorbed with a time lag and differently from person to person. Even the best per mille calculator can only give approximate values ​​that you should use with caution.