What temperature scale do UK cars use?

UK cars display temperatures in Celsius. The dashboard temperature gauge, climate control, and external temperature display all use Celsius. American imports may default to Fahrenheit and need to be switched in the settings.

What is normal engine operating temperature?

Most cars run at 85-105°C (185-221°F) once warmed up. The thermostat typically opens at 82-95°C. If your temperature gauge reads above 110°C (230°F), the engine is overheating and you should stop immediately.

At what temperature does engine coolant freeze?

Pure water freezes at 0°C (32°F). A 50/50 coolant-water mix protects down to about -37°C (-34°F). UK conditions rarely go below -15°C (5°F), so a standard mix provides adequate protection for British winters.

What engine oil temperature is too hot?

Engine oil should operate between 90-120°C (194-248°F). Above 130°C (266°F), oil begins to break down and lose its protective properties. Track driving can push oil temperatures much higher, which is why oil coolers are common on performance cars.

What temperature should my car engine run at?

Most car engines run at 80-100 degrees Celsius (176-212 degrees Fahrenheit). The thermostat typically opens at 82-95 degrees C. If your temperature gauge reads above 110 degrees C (230 degrees F), your engine is overheating and you should stop immediately.

CarCalcs

Fahrenheit to Celsius Converter

Convert temperatures between Fahrenheit and Celsius for automotive use.

Conversion Direction

Temperature (°F)

How We Calculate This

This converter uses the standard temperature conversion formulas.

The Formulas

Fahrenheit to Celsius: °C = (°F - 32) x 5/9
Celsius to Fahrenheit: °F = (°C x 9/5) + 32

Key Automotive Temperatures

Water freezing: 0°C / 32°F
Thermostat opening: 82-95°C / 180-203°F
Normal running: 90-105°C / 194-221°F
Oil breakdown: 130°C+ / 266°F+

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Last updated: February 2026

All calculations are estimates. Actual figures may vary based on driving conditions, vehicle specifications, and other factors.