Take your current altimeter setting and find the difference between it and 29.92

example 30.14-29.92=.22

So since our pressure lapses at one inch of mercury per thousand we need to take that .22 and multiply it by 1000 to come up with 220ft.

Now since our pressure is higher than standard, it means our pressure altitude is actually lower. So if our field elevation was 700ft, simply subtract that 220 to find that your pressure altitude is 480.