Research for infection protection

Ethanol concentration table:
what is the percentage by volume or weight?

The concentration of alcohol in a hand rub / gel is usually described as a percentage. This percentage may be expressed by volume or by weight. The two different scales are necessary because the volume “contracts” if ethanol and water are mixed.

Example: when 52 ml pure ethanol is mixed with 48 ml of water a volume of 96.3 ml is obtained instead of 100 ml. That is why it is important to distinguish between a percentage by volume or weight.

For ethanol we provide a table that allows for the most commonly used concentrations in hand rubs / gel to compare the values of both scales.

Concentration of ethanol by weight (w/w) Concentration of ethanol by volume (v/v)
52.1% (w/w) 60.0% (v/v)
54.1% (w/w) 62.0% (v/v)
60.0% (w/w) 67.7% (v/v)
61.0% (w/w) 68.7% (v/v)
62.4% (w/w) 70.0% (v/v)
65.0% (w/w) 72.4% (v/v)
70.0% (w/w) 77.0% (v/v)
73.5% (w/w) 80.0% (v/v)
75.0% (w/w) 81.3% (v/v)
80.0% (w/w) 85.5% (v/v)
85.0% (w/w) 89.5% (v/v)
89.0% (w/w) 92.5% (v/v)
90.0% (w/w) 93.3% (v/v)
95.0% (w/w) 96.8% (v/v)