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Thanks guys! You have more than answered my query. It was my mistake to assume that flight level was associated with atmospheric pressure in Kpa. I only made that assumption because I am studying meteorology, and knowing the height, or altitude of a pressure boundary is important in weather...

I am in the USA. That is interesting. I am listening to radio from a local airport but near three major airports. If "expected" flight level after 10 minutes is say 400, that would correspond to 40,000 feet, assuming that the sea level pressure is 29.92 in hg? What type of aircraft could climb...

OK, so it depends on who is talking to you. KPA is Kilo Pascals. It's used in meteorology to measure atmospheric pressure. 500KPA is a sort of standard level for weather forecasting.

It was not the scale I was questioning. It is just that sometimes it's flight level in KPA, and other times it's expected altitude in feet. I'm not a pilot. A friend of mine is, and I listen on my scanner. OK.

Hi; Can someone tell me why departure controller gives expected altitude (after 10 min) in KPA most of the time, but about one in ten he gives expected altitude in feet. I tried Google but couldn't find the answer there. Thanks FW