Specific Gravity is calculated as follows:

Symbol | Description | Units |
---|---|---|

SG | Specific gravity | - |

ρ_{std} |
Standard density | kg/Sm^{3} |

T_{std} |
Standard Temperature | K |

P_{std} |
Standard Pressure | bar a |

Z_{std} |
Compression factor at standard conditions | - |

Constant | Description | Value | Units |
---|---|---|---|

R | Universal Gas Constant | 8.314459848484848 | J/mol/K |

MM_{air} |
Molar mass of dry air | 28.9626 | kg/kmol |