This document provides standard conversion tables for various units of measurement including length, area, volume, velocity, mass, force, pressure, density, energy, power, flow rates, and temperature. It also outlines key assumptions used in the tables for natural gas, liquefied natural gas (LNG), and liquefied petroleum gas (LPG). For natural gas, it is assumed to be in the normal state at 0°C and 1 atmosphere. For LNG, 1 tonne is assumed to equal 1,300 normal cubic meters of gas. For LPG, properties are based on a simulated 50/50 propane/butane mixture under pressurized or refrigerated conditions.