: What's the formula for cutting vinegar acidity? I have a vinegar based bar-b-que sauce recipe that calls for 3% acidity vinegar which cannot be found. How do I cut 5% vinegar to 3%?

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Cut it with water.

Commercial white vinegar is basically nothing but water and acetic acid.

3 units of 5% vinegar and 2 units of plain water give 5 units of 3% vinegar.

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You asked for a formula

Let X bet the amount of 5%

The amount of water you need to add is
5/3*X - X
= 2/3*X

So if you have 6 cups
2/3*6 = 4 cups to add