Accurately calculate top-up volumes for CNC machine coolant with our easy-to-use Coolant Top-Up Calculator. Compatible with all coolant types, it accounts for evaporation, loss, and refractometer correction to help you maintain optimal concentration and protect your equipment.

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L
Gal
For New Fill
For New Fill
For Top Up
Desired concentration
Refractometer factor
Tank volume, Gal
Clear
Results:
Results:
Gal, of concentrate required
Gal, of water required
Readings on refractometer
L
Gal
For Top Up
For New Fill
For Top Up
Desired concentration (real)
Concentration in tank (readings)
Refractometer factor
Tank volume, L
Remaining volume in tank, L
Clear
Results:
Results:
Concentation in tank (real)
Desired concentration (readings)
Required concentrate, L
Top-up volume, L
Concentration in top-up (real)
Concentration in top-up (readings)