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Coolant Concentration Mixing Calculator

Blend a known-strength concentrate with water or an existing mixture to reach a target final volume and concentration using a mass-balance calculation.

LOCAL CALC / COOLANT-MIX
NO DATA SENT

INPUT

Enter values

Use 0% for fresh water.

OUTPUT

READY

Enter known values and calculate.

Results stay on this device.
Shop-floor check

Follow the coolant manufacturer’s SDS, label, mixing order, water-quality guidance, PPE, and disposal requirements. Never infer safe handling from this volume calculation.

01 / METHOD

How to use this calculator

  1. Choose a volume unit and final batch volume.
  2. Enter target, concentrate, and starting-liquid percentages.
  3. Calculate, mix safely, circulate, then verify with the coolant-specific test method.

02 / APPLICATION

Where it helps

  • Preparing a fresh sump batch
  • Blending from a known premix
  • Estimating concentrate needed for a target ratio

03 / BOUNDARIES

Assumptions and limitations

Assumes

  • Percentages use the same concentration basis
  • Volumes are additive
  • Starting and source concentrations are known accurately

Does not cover

  • Does not correct an unknown dirty sump
  • Refractometer readings may need a product factor
  • Temperature and contamination can affect measurement

04 / QUESTIONS

Frequently asked questions

Should coolant be added to water?

Common practice is to add concentrate to water while mixing, but the product label and manufacturer instructions control.

Is refractometer Brix equal to concentration?

Not always. Many coolants require a product-specific refractometer factor. Use a calibrated instrument and current product data.

Can this fix an existing sump?

Only if its current concentration is known and the simplified blend is appropriate. Contamination, tramp oil, evaporation, and depleted additives may require maintenance or replacement.