Appears to be accurate but not precise For NPL & LPG may not be precisely accurate past the 4th significant digit. I can't tell if it is the ASTM implementation examples that are wrong, or what, but I can't get my own implementation to converge using Table 23 without rounding. Looks like this app may be suffering the same problem. Accurate to at least 4 significant digits and easy to use. Cheers.
Good It works, even LPG. Thanks.
Ver. 1.4 Small internal fixes.
Ver.1.3 Fixes some LPG volume calculations. Corrects display problems with locations other than U.S.
Ver. 1.2 small internal fixes.