Antifreeze concentration - Brix converter

This calculator is based on curve fits to Dowtherm SR1 (ethylene glycol based) and Dowfrost heat transfer liquid (propylene glycol based) coolants.

Enter value in field and hit ENTER or SPACE to calculate the other.

Concentration V/V (%)
Brix °

Results are not assured for nonsense inputs... no range checking is done.

Example: If I have a ethylene glycol based coolant that is supposed to be mixed 4l to make up 12l, it is 33% V/V. It should have a Brix value around 23, and through life, its concentration should remain around that value.