Thank you, Mauro. I thought it gave absolute temperatures in previous versions (26.1, for example), but I just checked on version 25.1, and it, too, does as you say. Bill From: Mauro Aranda Sent: Monday, May 6, 2019 2:19 PM To: Harris, Bill Cc: 35608@debbugs.gnu.org Subject: Re: bug#35608: 26.2; Calc temperature conversions CAUTION: THIS EMAIL IS FROM AN EXTERNAL SENDER. Do not click on links or open attachments if the sender is unknown or the email is suspect. ________________________________ tags 35608 notabug quit "Harris, Bill" > writes: > I entered '10 degC' and then > u c degF > I got 18, not the expected 50. Hello. That's because ‘u c’ treats temperature units as relative, and not as absolute. The result you got means that a change of 10 degrees Celsius equals to a change of 18 degrees Fahrenheit. You need to use ‘u t’ (calc-convert-temperature) to convert an absolute temperature from one scale to another. With that command, you'll get the expected 50 degF. Best regards, Mauro.