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API Gravity Converter
Convert between API gravity, specific gravity, and density for crude oil and liquids. Includes oil classification by API gravity and price adjustment.
Inputs
Standard = 60°F
For revenue estimate
Results
Specific Gravity
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Density
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lb/gal
Density (kg/m³)
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kg/m³
Oil Classification
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Equations
Specific Gravity: SG = 141.5 / (API + 131.5)
Density (lb/gal): ρ = SG × 8.337
API Classification: Light crude > 31.1°API, Medium 22.3–31.1°API, Heavy 10–22.3°API, Extra-heavy < 10°API
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