Petroleum API Gravity (°API) ↔ Specific Gravity (60°F), Density & Degrees Baumé Converter

Convert °API gravity to Specific Gravity (SG), kg/m³, lbs/gal, and barrels per metric ton.

Specific Gravity at 60°F (SG)
0.827 SG
Fluid Density at 60°F (kg/m³) 826.188 kg/m³
Weight per US Gallon (lbs/gal) 6.888 lb/gal
Barrels per Metric Ton (bbl/t) 7.613 bbl/t
Inputs
⚡ Scenarios:
°API
API Gravity in degrees (Water = 10° API; Light sweet crude WTI ≈ 39.6° API; Brent ≈ 38° API; Heavy <22°).
Results & Graph
Specific Gravity at 60°F (SG)
0.827 SG
Fluid Density at 60°F (kg/m³)
826.188 kg/m³
Weight per US Gallon (lbs/gal)
6.888 lb/gal
Barrels per Metric Ton (bbl/t)
7.613 bbl/t

Specific Gravity at 60°F (SG)

Graph 1 • API Gravity ↔ Specific Gravity • Domain Architecture & Live Telemetry Maps Api Gravity Degrees through API Gravity ↔ Specific Gravity Formula.
FLUID & CHEMICAL CONVERSIO Specific Gravity at 60°F ( 0.827 SG Fluid Density at 60°F (kg/ 826.188 kg/m³ API Gravity ↔ Specific Gravity • Component Waterfall Specific Gravity at 60°F (SG) 0.827 SG Fluid Density at 60°F (kg/m³) 826.188 kg/m³ Weight per US Gallon (lbs/gal) 6.888 lb/gal Barrels per Metric Ton (bbl/t) 7.613 bbl/t
Graph 2 • Specific Gravity at 60°F (SG) Across Api Gravity Degrees Sweep (40% → 160%) Evaluates SG_60F = 141.5 / (°API + 131.5); Density_kg_m3 = SG_60F × 999.016; B across 7 operating points (current input highlighted).
0 SG 0.550 SG 1.10 SG 0.960 15.84°API 0.911 23.76°API 0.867 31.68°API 0.827 39.60°API 0.790 47.52°API 0.757 55.44°API 0.726 63.36°API
Graph 3 • API Gravity ↔ Specific Gravity Multi-Scenario Envelope Shows how Specific Gravity at 60°F (SG) responds across ±30% scenario shifts.
0 SG 0.550 SG 1.10 SG 0.889 -30% 0.857 -15% 0.827 +0% 0.799 +15% 0.773 +30%
Summary: 39.6° API crude oil has a Specific Gravity of 0.827 (826.2 kg/m³ / 6.89 lbs/gal) and yields 7.61 US barrels per metric ton.
Summary: 39.6° API crude oil has a Specific Gravity of 0.827 (826.2 kg/m³ / 6.89 lbs/gal) and yields 7.61 US barrels per metric ton.
⚡ Send result to: Unit Converter →Scientific →Date Difference →
Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: API Gravity ↔ Specific Gravity Formula

SG60F = 141.5 / (°API + 131.5)
Densitykgm3 = SG60F × 999.016
BarrelsPerMetricTon = 6.2898 / SG60F
SG_60F = 141.5 / (°API + 131.5); Density_kg_m3 = SG_60F × 999.016; BarrelsPerMetricTon = 6.2898 / SG_60F
  • apiGravityDegrees: API Gravity in degrees (Water = 10° API; Light sweet crude WTI ≈ 39.6° API; Brent ≈ 38° API; Heavy <22°).

Rounding: Internal floating-point calculations run in 64-bit IEEE-754 double precision; display values round to 2–4 decimal places.

Worked Example: API Gravity ↔ Specific Gravity Worked Example

Convert °API gravity to Specific Gravity (SG), kg/m³, lbs/gal, and barrels per metric ton.

  1. Enter the input measurement, system configuration, or astronomical parameter.
  2. Apply the standard conversion or analytical equation: SG_60F = 141.5 / (°API + 131.5); Density_kg_m3 = SG_60F × 999.016; BarrelsPerMetricTon = 6.2898 / SG_60F.
  3. Inspect the primary metric, secondary equivalents, and 3 real-time SVG graphs.
Result: Computes API Gravity ↔ Specific Gravity via SG_60F = 141.5 / (°API + 131.5); Density_kg_m3 = SG_60F × 999.016; BarrelsPerMetricTon = 6.2898 / SG_60F.

Frequently Asked Questions

How does the Petroleum API Gravity (°API) ↔ Specific Gravity (60°F), Density & Degrees Baumé Converter perform the calculation?

It evaluates SG_60F = 141.5 / (°API + 131.5); Density_kg_m3 = SG_60F × 999.016; BarrelsPerMetricTon = 6.2898 / SG_60F directly in your browser and renders three custom SVG charts in real time.

Can I solve backwards for an input parameter using Goal Seek?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input field.

Does this tool work offline?

Yes. All calculations run 100% locally in your browser with full offline PWA support.

Unit Conversions · Fluid & Chemical Conversions

Petroleum API Gravity (°API) ↔ Specific Gravity (60°F), Density & Degrees Baumé Converter: inputs, method, and how to read the result

Convert °API gravity to Specific Gravity (SG), kg/m³, lbs/gal, and barrels per metric ton.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Api Gravity Degrees: API Gravity in degrees (Water = 10° API; Light sweet crude WTI ≈ 39.6° API; Brent ≈ 38° API; Heavy <22°).

What the calculation includes

With the default values shown, Specific Gravity at 60°F (SG) is 0.827 SG. The calculation follows API Gravity ↔ Specific Gravity Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Api Gravity Degrees from 39.6 °API to 43.56 °API changes Specific Gravity at 60°F (SG) from 0.827 SG to 0.808 SG. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses official NIST Special Publication 811, IEEE/RFC systems engineering, APA psychometric, and USNO astronomical formulas.
  • Empirical metallurgy and calendar conversions represent standard reference-condition approximations.

Scope: Global NIST, IEEE, APA & Astronomical Standard Check the assumptions and limitations against your situation before relying on the estimate.

More in Unit Conversions: Unit Conversion Calculator, Scientific Calculator, Date Difference & Business Days Calculator.