Does diluting vodka with a mixer reduce the strength?

Yes, diluting vodka with any non-alcoholic mixer will reduce its strength.

Alcohol by Volume, or ABV, is the amount of alcohol in a drink. When you mix vodka with a non-alcoholic mixer, you are reducing the amount of alcohol in the drink. This is like multiplying a number - the ABV - by a percentage - how much mixer you're adding - and ending up with a smaller number - the ABV of the drink you've just made.

For example, if you mix 100ml of vodka (40% ABV) with 100ml of mixer, the ABV of the resulting drink will be 20%. This is because the amount of alcohol in the drink has been halved.

However, if you mix 100ml of vodka with 200ml of mixer, the ABV of the resulting drink will be 13.3%. This is because the amount of alcohol in the drink has been divided by three.

The ABV of a drink can also be reduced by adding ice. This is because ice displaces some of the liquid in the drink, which means there is less alcohol in each sip.

So, if you are looking to reduce the ABV of your vodka drink, you can do so by mixing it with non-alcoholic mixers or adding ice.