# How can you calculate density from : altitude temperature and absolute humidity

1. May 10, 2007

### pips

How can you calculate density from : altitude temperature and absolute humidity

2. May 10, 2007

### FredGarvin

The easiest way is to use a standard atmospheric table like the one here:
http://modelweb.gsfc.nasa.gov/atmos/us_standard.html [Broken]

http://hypertextbook.com/facts/2000/RachelChu.shtml

If you want to get down and dirty with density calculations, look around for NIST's publication NBSIR 77-1278 The Air Density Equation and the Transfer of the Mass Unit.

Last edited by a moderator: May 2, 2017
3. May 12, 2007

### Mech. Engineer

from humidity u can find due point

due point and temp u can find pressure

if the fluid is ideal u can find volume by PV=nRT

if u know pressure and temp u can find spc. volume

from spc.volume and volume u can find mass

from mass and volume u can find density...

4. May 12, 2007

### FredGarvin

If you know specific volume, you know the density.