AndersE wrote:sure minutes is ok like 90min but converting that to 1.50 hour is just stupid (we don't count 100 on an hour.) .. i want it to say 1.30 and no h after that.
In the US, and most countries, there's no ambiguity: 1.50 hours means one and a half hours, because 1.5 means one and a half, and 1:50 hours means one hour 50 minutes, because colon is the separator between hours and minutes.
The place where it's ambiguous is in Germany (for example) where they use . as the separator between hours and minutes. So in Germany 1.50 hours could be read either as one and a half hours, or as one hour 50 minutes. Though Germany recently (20 years or so) formally switched to using the colon for consistency with everywhere else, many people still write it with a period.
What most software tries to do is use "human friendly" small-ish numbers, and switch the units around. So, for example, a timer would count down by hours with one decimal point (e.g. 7 hours, 2.5 hours, 2.2 hours, etc.), until it gets to two hours, then switch to minutes, because, as you say, 90 minutes looks more friendly than 1.5 hours. Other timers use HH:MM:SS, which is simpler, and consistent, but less friendly.