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Unit conversions from SI to other unit systems
APPENDIX A
Unit conversions from SI to other unit systems 1. Length \
km
m
cm
mile
ft
in.
1km 1 m 1 cm 1 mile 1 ft 1in.
1 0.001 105 1.60934 3.48 104 2.54 105
1000 1 0.01 1609.34 0.3048 0.0254
105 100 1 1.60934 105 30.48 2.54
0.6214 6.214 104 6.214 106 1 1.839 104 1.5783 105
3280.84 3.28084 0.0328084 5280 1 0.08333
39370.08 39.37008 0.393701 63360 12 1
2. Area \
m2
cm2
ft2
in.2
1m2 1cm2 1 ft2 1 in.2
1 104 0.092903 6.4516 104
104 1 929.03 6.4516
10.7639 1.07639 103 1 6.9444 103
1550 0.1550 144 1
3. Volume m3
\ 3
1m 1cm3 1ft3 1bbl 1L
1 106 0.0283168 0.158988 103
cm3 6
10 1 2.83168 104 1.58988 105 103
ft3
bbl
L
35.3147 3.53147 105 1 5.6146 3.53147 102
6.28978 6.28978 106 0.17811 1 6.28978 103
1000 103 28.3168 158.99 1
329
330
Appendix A
4. Pressure \
MPa
kPa
atm
bar
kg/cm2
psi
1 MPa 1 kPa 1 atm 1 bar 1 kg/cm2 1 psi
1 0.001 0.101325 0.1 0.0980665 0.00689476
1000 1 101.325 100 98.0665 6.89476
9.86923 9.86923 103 1 0.986923 0.967841 0.068406
10 0.01 1.01325 1 0.980665 0.0689476
10.1972 0.0101972 1.03323 1.01972 1 0.070307
145.038 0.145038 14.6959 14.5038 14.2233 1
5. Temperature \
°C
K
°F
°R
1 °C 1K 1 °F 1 °R
t T 273.15 5(f 32)/9 5r/9 273.15
t+ 273.15 T 5(f+ 459.67)/9 5r/9
1.8t +32 1.8T 459.67 f r 459.67
1.8t +491.67 1.8T f+ 459.67 r
6. Oil production m3/d
\ 1 m /d 1 cm3/s 1 bbl/d 3
cm3/s 4
1 0.0864 0.158988
10 /864 1 1.84014
bbl/d 6.28978 0.543437 1
7. Gas production 104 m3/d
\ 1 10 m /d 1 cm3/s 1 103 ft3/d 1 106 ft3/d 4
3
1 864 108 2.83168 103 2.83168
cm3/s 8
10 /864 1 327.741 327741
Mscf/d
MMscf/d
353.147 3.05119 103 1 1000
0.353147 3.05119 106 0.001 1
331
Appendix A
8. Compressibility \
1/MPa
1/atm
1/(kg/cm2)
1/psi
1/MPa 1/atm 1/(kg/cm2) 1/psi
1 9.86923 10.1972 145.038
0.101325 1 1.03323 14.6959
0.0980665 0.967841 1 14.2233
0.00689476 0.068406 0.070307 1
9. Permeability μm2
\ 2
1μm 1mD
1 0.98692 103
cm2 8
10 9.8692 1012
m2 12
10 9.8692 1016
10. Viscosity 1 mPa .s ¼ 103 Pa .s ¼ 103 μPa .s ¼ 1 cP 11. Relative density of stock tank oil, (γ o), and °API 141:5 ° API ¼ 131:5 γo γ o ¼ 141.5/(131.5 + °API) 12. Gas-oil ratio 1 m3/m3 ¼5.615 scf/STB 1 scf/STB¼0.1781 m3/m3
mD
D
1.0133 10 1
3
1.0133 103
Unit conversions from SI to other unit systems 1. Length \
km
m
cm
mile
ft
in.
1km 1 m 1 cm 1 mile 1 ft 1in.
1 0.001 105 1.60934 3.48 104 2.54 105
1000 1 0.01 1609.34 0.3048 0.0254
105 100 1 1.60934 105 30.48 2.54
0.6214 6.214 104 6.214 106 1 1.839 104 1.5783 105
3280.84 3.28084 0.0328084 5280 1 0.08333
39370.08 39.37008 0.393701 63360 12 1
2. Area \
m2
cm2
ft2
in.2
1m2 1cm2 1 ft2 1 in.2
1 104 0.092903 6.4516 104
104 1 929.03 6.4516
10.7639 1.07639 103 1 6.9444 103
1550 0.1550 144 1
3. Volume m3
\ 3
1m 1cm3 1ft3 1bbl 1L
1 106 0.0283168 0.158988 103
cm3 6
10 1 2.83168 104 1.58988 105 103
ft3
bbl
L
35.3147 3.53147 105 1 5.6146 3.53147 102
6.28978 6.28978 106 0.17811 1 6.28978 103
1000 103 28.3168 158.99 1
329
330
Appendix A
4. Pressure \
MPa
kPa
atm
bar
kg/cm2
psi
1 MPa 1 kPa 1 atm 1 bar 1 kg/cm2 1 psi
1 0.001 0.101325 0.1 0.0980665 0.00689476
1000 1 101.325 100 98.0665 6.89476
9.86923 9.86923 103 1 0.986923 0.967841 0.068406
10 0.01 1.01325 1 0.980665 0.0689476
10.1972 0.0101972 1.03323 1.01972 1 0.070307
145.038 0.145038 14.6959 14.5038 14.2233 1
5. Temperature \
°C
K
°F
°R
1 °C 1K 1 °F 1 °R
t T 273.15 5(f 32)/9 5r/9 273.15
t+ 273.15 T 5(f+ 459.67)/9 5r/9
1.8t +32 1.8T 459.67 f r 459.67
1.8t +491.67 1.8T f+ 459.67 r
6. Oil production m3/d
\ 1 m /d 1 cm3/s 1 bbl/d 3
cm3/s 4
1 0.0864 0.158988
10 /864 1 1.84014
bbl/d 6.28978 0.543437 1
7. Gas production 104 m3/d
\ 1 10 m /d 1 cm3/s 1 103 ft3/d 1 106 ft3/d 4
3
1 864 108 2.83168 103 2.83168
cm3/s 8
10 /864 1 327.741 327741
Mscf/d
MMscf/d
353.147 3.05119 103 1 1000
0.353147 3.05119 106 0.001 1
331
Appendix A
8. Compressibility \
1/MPa
1/atm
1/(kg/cm2)
1/psi
1/MPa 1/atm 1/(kg/cm2) 1/psi
1 9.86923 10.1972 145.038
0.101325 1 1.03323 14.6959
0.0980665 0.967841 1 14.2233
0.00689476 0.068406 0.070307 1
9. Permeability μm2
\ 2
1μm 1mD
1 0.98692 103
cm2 8
10 9.8692 1012
m2 12
10 9.8692 1016
10. Viscosity 1 mPa .s ¼ 103 Pa .s ¼ 103 μPa .s ¼ 1 cP 11. Relative density of stock tank oil, (γ o), and °API 141:5 ° API ¼ 131:5 γo γ o ¼ 141.5/(131.5 + °API) 12. Gas-oil ratio 1 m3/m3 ¼5.615 scf/STB 1 scf/STB¼0.1781 m3/m3
mD
D
1.0133 10 1
3
1.0133 103