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