API Gravity Calculator – FAHRENHEIT
GTP-3012-1A
API Gravity & Relative Density Calculator
Description
Corrects API hydrometer readings at any temperature (°F) to API degrees at 60°F.
Corrects relative density hydrometer readings at any temperature (°F) to relative density at 60°F
Converts API gravity to relative density (previously termed specific gravity)
Converts API gravity to metric density (kg/m³)
Converts API gravity to weight (lbs/gal)
Instructions
- Rotate the disk until the observed hydrometer reading (°API) is aligned with observed temperature (°F).
- Read the corrected °API at the 60°F arrow.
NOTE: If a relative density or specific gravity hydrometer is used, set the hydrometer reading opposite the observed temperature. Then read the corrected relative density at the 60°F arrow.
NOTE: Results obtained with this calculator in the API gravity range from 48 to 51 (or a correction that goes through this range) cannot be compared to the printed tables because we have avoided error created by this transition zone (see Volume X of Petroleum Measurement Tables (D1250-80/IP200), pages X-73 to X-79). 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.
| GTP-3012-1A: | 6635-01-591-0661 |
