double the C
subtract 10%
add 32

Exact


Karl


"vincent p. norris" wrote in message
...
http://www.asy.faa.gov/safety_products/metar_taf.pdf

I noticed that site tells how to convert C to F, the HARD way.

Here's a much easier way: Double the C, add 30.

You'll be within a degree or two, close enough for government work.

vince norris