this post was submitted on 20 Nov 2025
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0 Celsius: Water freezes
0 Kelvin: Absolute zero
0 Fahrenheit:
0F = colder than frozen water, but warmer than absolute 0.
0°F is the warmest allowed temperature for freezing food in the service industry. We measure with Celsius here so I only recently found out that -18°C = -0.4°F which is just about 0°F. I was looking at some cases of food we store in the freezer and noticed it said “store at -18°C (0°F) or colder”. I doubt that’s the actual reason for 0°F being what it is, but it is a practical use case for that temperature.
This is the first useful example of fahrenheit I've ever heard.
Doesn't really beat 0°C being freezing (great for weather), in my opinion, but still nice!
Thanks
~-40 C = -40 F. Although Metric>>>>imperial.