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Conversion Factors

Conversion Factors

Technical Data - Conversion Factors

The following page contains conversion factors to be used in decyphering gas data and measurements into the unit of measurement to suit your needs. 

You will find the following information below :

  • Area
  • Volume
  • Flow Rate
  • Pressure
  • Length
  • Weight
  • Density
  • Concentration Equivalents
  • Temperature Conversions
  • Dew Point vs. Parts Per Million Moisture
  • Useful Gas Contants
Area
from/to cm2 m2 km2 in2 ft2 mile
cm2 1 0.0001 1x10-10 0.1550 0.0010 3.86x10-11
m2 1x104 1 1x104 1550 10.76 3.86x10-7
km2 1x1010 1x106 1 1.553.x10-9 1.08107 0.3861
in2 6.452 6.45x10-4 6.45x10-10 1 0.00694 2.49x10-10
ft2 929.0 0.09290 9.29x10-4 144 1 3.59x10-3
mile 2.59x1010 2.59x104 2.590 4.01x10-9 2.79x107 1

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Volume
from/to cm3 lit m3 in3 ft3 yd3 fl oz
cm3 1 0.001 1x10-6 0.06102 3.53x10-5 1.31x10-6 0.03381
lit 1000 1 0.001 61.02 0.03532 0.00131 33.81
m3 1x104 1000 1 6.10x104 35.31 1.308 3.38x104
in3 16.39 0.01639 1.64x10-5 1 5.79x10-4 2.14x10-5 0.5541
ft3 2.83x104 28.32 0.02832 1728 1 0.03704 957.5
yd3 7.65x105 764.5 0.7646 4.67x104 27 1 2.59x104
fl oz 29.57 0.02917 2.96x10-5 1.805 0.00104 3.87x10-5 1

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Flow Rate
from/to Liter/
sec
cm3/min US Gal/
min
Liter/
min
ft3/
sec
ft3/
min
m3/
sec
m3/
hr
Liter/sec 1 60000 15.850 60 0.03531 2.11888 0.001 3.6
cm3/min 1.67x10-5 1 2.64x10-4 0.001 5.88x10-7 3.53x10-5 1.67x10-8 6.01x10-5
USGal/min 0.06309 3785.41 1 3.7854 2.22x10-3 0.13368 6.309x10-5 0.22712
Liter/min 0.01667 1000 0.26417 1 5.88x10-4 0.03532 1.667x10-5 0.060
ft3/sec 28.317 1.69x106 448.831 1699.0 1 60 0.02832 101.941
ft3/min 0.47195 28317 7.48052 28.317 0.01667 1 4.72x10-4 1.699
m3/sec 1000 6.00x107 15850 60000 35.315 2118.9 1 3600
m3/hr 0.2778 16667 4.4033 16.667 9.80x10-3 0.5887 2.78x10-4 1

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Pressure
from/to mm Hg in Hg inH2O ft H2O atm lb/in2 kg/cm2
mm Hg 1 0.03937 00.5353 0.04460 0.00132 0.01934 0.00136
in Hg 25.40 1 13.60 1.133 0.03342 0.4912 0.03453
in H2O 1.868 0.07355 1 0.08333 0.00246 0.03613 0.00254
ft H2O 22.42 0.8826 12 1 0.02950 0.4355 0.03048
atm 760 29.92 406.08 33.90 1 14.70 1.033
lb/in2 51.71 2.036 27.67 2.307 0.06805 1 0.07031
kg/cm2 735.6 28.96 393.7 32.81 0.9678 14.22 1

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Length
multiply Å micron mm cm m inch feet
Å 1 1x10-3 1x10-4 1x10-8 1x10-10 3.937x10-9 3.2808x10-10
micron 10000 1 0.001 0.0001 1x10-6 3.937x10-5 3.2808x10-6
mm 1x107 1x103 1 0.1 0.001 0.03937 0.0032808
cm 1x108 1x104 10 1 0.01 0.3937 0.032808
m 1x1010 1x106 1000 100 1 39.37008 3.2808
inch 2.54x108 2.54x104 25.4 2.54 0.0254 1 0.08333
feet 3.048x109 3.048x105 304.8 30.48 0.3048 12 1

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Weight
mulitply mg g kg oz lbs ton, US ton
mg 1 0.001 0.000001 3.5274x10-5 2.2046x10-8 1.1020x10-9 1.00EXx10-9
g 1000 1 0.001 0.03527 0.0022046 1.1020x10-6 1.1020x10-6
kg 1000000 1000 1 35.27396 2.2046226 0.001102 0.001
oz 28349.5 28.3495 0.02834 1 0.0625 3.1250x10-5 2.8300x10-4
lbs 453592 453.592 0.45359 16 1 0.0005 4.5350x10-4
ton, US 9.0719x108 907.185 907.1847 32000 2000 1 0.907
ton 1x109 1x106 1000 35274 2205 1.102 1

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Density
multiply lb/cu. in lb/cu. ft. lb/gal gram/cu. cm gram/lit
lb/cu. in 1 1728 231 27.68 27680
lb/cu. ft. - 1 0.1337 0.016 16.019
lb/gal 0.00433 7.481 1 0.1198 119.83
gram/cu. cm 0.03613 62.43 8.345 1 1000
gram/lit - 0.06243 0.008345 0.001 1

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Concentration Equivalents
multiply ppt ppb ppm percent %
ppt 1 0.001 0.000001 1x10-10
ppb 1000 1 0.001 0.0000001
ppm 1 000 000 1000 1 0.0001
percent % 10 000 000 000 10 000 000 10 000 1

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Temperature Conversions
multiply Celsius oC Fahrenheit oF Kelvin oK Rankin oR
Celcius oC 1 9/5(oC) +32 oC + 273.15 (oC +273.15)1.8
Fahrenheit oF (oF-32)(5/9) 1 (oF-32)(5/9)+273.115 oF + 459.67
Kelvin oK oK - 273.15 (oK-273.15)1.8+32 1 (oK)1.8
Rankin oR (oR/1.8)-273.15 oR-45967 oR/1.8 1

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Temperature Conversions
oC oF oC oF oC oF oC oF
-273.15 -459.67 25 77 240 464 540 1004
-260 -436 30 86 250 482 550 1022
-240 -400 35 95 260 500 560 1040
-220 -364 40 104 270 518 570 1058
-200 -328 45 113 280 536 580 1076
-180 -292 50 112 290 554 590 1094
-160 -256 55 131 300 572 600 1112
-140 -220 60 140 310 590 610 1130
-120 -184 65 149 320 608 620 1148
-100 -148 70 158 330 626 630 1166
-80 -112 75 167 340 644 640 1184
-70 -94 80 176 350 662 650 1202
-65 -85 85 185 360 680 660 1220
-60 -76 90 194 370 698 670 1238
-55 -67 95 203 380 716 680 1256
-50 -58 100 212 390 734 690 1274
-45 -49 110 230 400 752 700 1292
-40 -40 120 248 410 770 710 1310
-35 -31 130 266 420 788 720 1328
-30 -22 140 284 430 806 730 1346
-25 -13 150 302 440 824 740 1364
-20 -4 160 320 450 842 750 1382
-15 5 170 338 460 860 760 1400
-20 14 180 356 470 878 770 1418
-5 23 190 374 480 896 780 1436
0 32 200 392 490 914 790 1454
5 41 210 410 500 932 800 1472
10 50 212 414 510 950 810 1490
15 59 220 428 520 968 820 1508
20 68 230 446 530 986 830 1526

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Dew Point vs. Parts Per Million Moisture
Dew Point Moisture Dew Point Moisture Dew Point Moisture
oC ppm
(vol/vol)
oC ppm
(vol/vol)
oC ppm
(vol/vol)
0 6000 -30 380 -60 10.6
-1 5550 -31 342 -61 9.2
-2 5100 -32 309 -62 8
-3 4700 -33 276 -63 6.98
-4 4350 -34 249 -64 6.08
-5 3980 -35 222 -65 5.28
-6 3650 -36 200 -66 4.58
-7 3380 -37 179 -67 3.96
-8 3080 -38 162 -68 3.40
-9 2840 -39 144 -69 2.94
-10 2590 -40 128 -70 2.53
-11 2360 -41 114 -71 2.17
-12 2160 -42 102 -72 1.87
-13 1980 -43 90 -73 1.61
-14 1800 -44 80 -74 1.37
-15 1650 -45 71.9 -75 1.17
-16 1500 -46 63.5 -76 1.01
-17 1360 -47 56.2 -77 0.86
-18 1250 -48 49.9 -78 0.73
-19 1140 -49 44 -79 0.618
-20 1030 -50 39 -80 0.522
-21 940 -51 34.2 -81 0.498
-22 860 -52 30.4 -82 0.378
-23 765 -53 26.7 -83 0.315
-24 697 -54 23.4 -84 0.262
-25 625 -55 20.6 -85 0.221
-26 553 -56 18.2 -86 0.186
-27 517 -57 15.9 -87 0.156
-28 467 -58 13.9 -88 0.130
-29 426 -59 12.1 -89 0.110

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Useful Gas Constants
Numerical Constant Value Units of measurement
Volume of ideal gas at STP 22.414L Litres, 0oC, 1 atm
Volume of ideal gas at NTP 24.146L Litres, 70oF, 1atm
Avogadro's Number 6.22045x1023 molecules/gm-mol
Gas Law Constant, R 1.98719 cal/(gm-mol)(oK)
  82.568 (cm3)(atm)/(gm-mol)(oK)
Density of air (STP) 1.293x10-3 g/cm3 0oC, 760 mm Hg

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