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title=Coolant Mix Calculator meta_title=Coolant Mix Calculator description=Calculate how much coolant concentrate and distilled water you need for the right mix. canonical=https://troubleshootyourvehicle.com/tools/coolant-mix-calculator >

Coolant Mix Calculator

Build the Right Mix

Check your owner's manual for exact capacity and approved coolant.

Mix Notes

  • 50/50: Typical protection to about -34°F (-37°C).
  • 60/40: Extra freeze protection for harsh winters.
  • Use distilled water: Tap water adds minerals that scale the system.