good convertor

[SpudFarm]

http://www.onlineconversion.com/pressure.htm

convert from everything to everything.

one good tool for a spudgunner.

[jimmy101]

Or, download http://joshmadison.com/article/convert-for-windows .
It'll convert pressure, volume, length, speed, temperature, work, energy, and many other units.

[SpudFarm]

i have that one (i think) but online is better for some people

[psycix]

I just use goolgle:

If you enter 100 psi -> bar google will say
"100 pounds per square inch = 6.89475729 bar"

This works with almost any unit you usually come across.
The only downside it that its picky with stuff like ft/lb's or something like 2", you need to write down foot pound and 2 inch instead

[SpudFarm]

i also use google..
but i think this one looks more professional 8)

jimmy: the one you suggested are really good.

[pizlo]

How bout installing units command for terminal in linux, you can convert milimeters per picosecond to furlongs per fortnight
Nice find for the non linux users.