Categories
Oil Correlations

Api Gravity Calculator

Use our online API Gravity Calculator.

API Gravity Formulas:

  • API = (141.5 / SG) – 131.5.
  • SG = 141.5 / (API + 131.5).

where:

SG: Specific Gravity (at 60oF).

API :Degrees API Gravity.

API Gravity Definitions:

Definition of API Gravity of water provided by WikiPedia:

The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. if its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks.

API Gravity Definitions

API Gravity to Specific Gravity and Density Chart:

Degree API.Specific Gravity.Density (kg/m3).
71,0221021,661
81,0141014,337
91,0071007,117
101,0001000,000
110,993992,982
120,986986,063
130,979979,239
140,973972,509
150,966965,870
160,959959,322
170,953952,862
180,946946,488
190,940940,199
200,934933,993
210,928927,869
220,922921,824
230,916915,858
240,910909,968
250,904904,153
260,898898,413
270,893892,744
280,887887,147
290,882881,620
300,876876,161
310,871870,769
320,865865,443
330,860860,182
340,855854,985
350,850849,850
360,845844,776
370,840839,763
380,835834,808
390,830829,912
400,825825,073
410,820820,290
420,816815,562
430,811810,888
440,806806,268
450,802801,700
460,797797,183
470,793792,717
480,788788,301
490,784783,934
500,780779,614
API Gravity to Specific Gravity and Density Chart

They are many common crude types like west Texas, Brent… API gravity is a measure of how light or heavy the crude oil compared  to water.

Crude Oil Location API Gravity
West TexasUSA40.2
Nacx1Prop39.4
BrentNorth Sea39
Bach HoViet Nam38.6
EastexUSA38.2
MagllanesChile37.5
SaucesArgentina35.9
West Texas SourUSA35.3
Minasindonesia35.1
Arab lightSaudi Arabia34
Gulf 1PetroPlan33.6
IsthmusMexico32.9
KuwaitKuwait32.4
TachingChina32.3
OrienteEcuador31.6
ForcadosNigeria30
Arab HeavySaudi Arabia28.8
Cano LimonColombia31
Largo TrecoVenezuela27.7
AlaskaUSA27.1
Tia Juana MedVenezuela25.4
ShengliChina24.7
BCF-24Venezuela23.6
MayaMexico22.1
WilmingtonUSA19
BachaqueroVenezuela17.3
BoscanVenezuela10.2
Crude Oil API Gravity Chart

Reference :   Api Gravity