If you want to save some googling when writing posts about temperatures that people from other parts of the world might read, https://vampire.expert/temperature-internationalizationator/ takes a number and a scale and gives you an HTML snippet showing the temperature converted to the other scale in a ruby annotation, like so:
My apartment got up to 29 °C last summer, and I made this utility to help me complain about it this summer with less effort.
Yes, we're pretending there are only two temperature scales. I might make the page look nicer and add more goofy stuff eventually, but for now I'm happy if it works and makes sense.
