Relativity-4-Engineers Cosmological Calculator, 2012-08-12 (LCDM model, default input data as per Feb 2010)

Omega Matter Now Feb 2010 value, change if required
Omega Radiation Now Feb 2010 value, change if required
Omega Lambda Now Feb 2010 value, change if required
Hubble Constant Now Km/s per Mpc Feb 2010 value, change if required
Redshift (z) of the source Now CMB value. Insert redshift value you want here
(Restores defaults)
Values "Now", when photons arrived Values "Then", when photons left source
Proper distance of the source MLy Proper distance of the source Mly
Lookback time My Hubble constant Km/s per Mpc
Cosmological Time or "age" of universe My Cosmological Time or "age" of universe My
Proper recession speed c Proper recession speed c
Proper radius of the observable universe MLy Proper radius of the observable universe MLy
Hubble time or radius My/Mly Hubble time or radius My/Mly
Approximate luminosity distance Mly Omega Matter
Approximate diameter distance Mly Omega Radiation
Apparent recession speed (SR value) c Omega Lambda
Time needed for 1% growth in cosmic distance My Time needed for 1% growth in cosmic distance My

Return to the Cosmology page at Relativity-4-Engineers; * Credits to Hellfire and Marcus for invaluable inputs and to Coburt for programming assistance with the info popups.

1 Energy densities are indirectly observed. Various observed cosmological parameters are plugged into Lambda Cold Dark Matter (LCDM) mathematical models, which then yield the respective energy densities that fit all the observations best.

2 http://en.wikipedia.org/wiki/Distance_measures_(cosmology), equations for DM, DA and DL.