- API Gravity range from 48 to 51
- Rotate disk until the observed hydrometer reading (°API) is aligned with observed temperature, °F. Read corrected Degrees API at the 60°F arrow
With this API Gravity calculator errors can be avoided created by the transition zone compared to the printed tables. For jet fuels, we extended the curve upward using the original equation without entering the transition zone. For avgas, we extended the gasoline curve downward in the same manner. From a technical standpoint, our scales will yield more accurate results than the printed tables.