We all know how crazy converting pressure units from obscure systems of measurement can be, along with other units of measure, some of which are actually engineering type of units.

There are any number on calculators, and converters online, including the ones in the "engineering toolbox". If you know how to navigate "the engineering toolbox" from its home page, then you truly are an engineer.

For the many varied pressure units I have come across in my career at these local power plants, and other places I have called on while servicing water treatment accounts, I finally came up with a spreadsheet, and it has one main page, and one conversion factor table page.

The converter is set up in such a manner that I type in yellow boxes the input value and UOM (as suggested by text possibilities) (it should have been made into a drop-down menu), then you type in the UOM for the output measurement, and the adjacent cell gives you the conversion factor to multiply the input by.

The result window updates as soon as you hit enter.

I also made a simple entry for the barometric equation, for pressure change (assuming nothing about any lapse rate of temperature for the air column above), to gauge how much correction to apply to flow measurements when corrected back to sea level measurement, and if the pressure and temperature were different from STP as measured.

Anyone who wants the spreadsheet is more than welcome to it. The conversion factors either came directly from one of the later editions of CRC Handbook of Chemistry and Physics, or were derived from published conversion factors there. By the way, I did find errors in their conversion factor tables, and these were corrected in my factor matrix.

I have found it to be a worthwhile thing to have around, from time to time. Hint: yes we should all be using standard MKS units of measurement for pressure by now, but no not all of us do.

## Comments rated to be "almost" Good Answers:

Re: Units Converters" by silvCrow on 05/22/2017 4:19 PM (score 1)Re: Units Converters" by PWSlack on 05/23/2017 5:28 AM (score 1)Re: Units Converters" by Dennis R. Levesque on 05/24/2017 12:55 PM (score 1)