Conversion Table
Concentrations
Common Units of Mass & Weight
Common Units of Length
Common Units of Volume
Common Units of Pressure
Common Units of Energy
Gas Constant
Common units of Temperature
Transmittance to Absorbance Conversion
Particle size Conversion
Concentrations
Concentrations
| Percentage (%) | Part per Million (ppm) | Part per Billion (ppb) | Part per Trillion (ppt) |
|---|---|---|---|
| 1 | 10,000 | 10,000,000 | 10,000,000,000 |
| 0.1 | 1,000 | 1,000,000 | 1,000,000,000 |
| 0.0001 | 1 | 1,000 | 1,000,000 |
| 0.0000001 | 0.001 | 1 | 1,000 |
| 0.0000000001 | 0.000001 | 0.001 | 1 |
| 0.0000000000001 | 0.000000001 | 0.000001 | 0.001 |
Common Units of Mass & Weight
Common Units of Mass & Weight
1 pound = 453.5924 grams1 pound = 453.5924 grams = 0.45359 kilograms = 7000 grains
1 kilogram = 1000 grams = 2.205 pounds1 pound = 453.5924 grams = 0.45359 kilograms = 7000 grains
1 metric ton = 1000 kilograms = 2204.62 pounds
Common Units of Length
Common Units of Length
1 inch = 2.54 centimeters
1 mile = 5280 feet = 1.609 kilometers = 0.3048 meters
1 mile = 5280 feet = 1.609 kilometers
1 mile = 5280 feet = 1.609 kilometers
1 yard = 36 inches = 0.9144 meter
1 meter = 100 centimeters = 39.37 inches = 3.281 feet = 1.094 yards
1 kilometer = 1000 meter = 1094 yards = 0.6215 mileyards
1 angstrom = 1.0 X 10-8 centimeter = 0.10 nanometer = 1.0 X 10-10 meter
Common Units of Volume
Common Units of Volume
1 liter = 1 cubic decimeter = 1000 cubic centimeters = 0.001 cubic meter
1 milliliter = 1 cubic centimeter = 0.001 liter
1 gallon = 3.7853 liters
Common Units of Pressure
Common Units of Pressure
| Unit | N.m-2(Pa) | bar | atm | Torr (mm Hg) | lbs/sq.in. (psi) |
|---|---|---|---|---|---|
| 1N.m-2(1Pa) | 1 | 10-5 | 9.8692X10-6 | 7.50062X10-3 | 1.45038X10-4 |
| 1 bar | 105 | 1 | 0.98692 | 750.062 | 14.5038 |
| 1 atm | 101325 | 1.01325 | 1 | 759.9988 | 14.6960 |
| 1 Torr (1 mm Hg) | 133.3224 | 1.333224X10-3 | 1.31579X10-3 | 1 | 1.93368 X10-2 |
| 10 lbs/sq.in. (psi) | 68948 | 0.68948 | 0.68046 | 517.148 | 10 |
Common Units of Energy
Common Units of Energy
1 joule = 1 X 107 ergs
1 calorie = 4.184 joules = 4.184 X 107 ergs = 4.129 X 10-2 liter-atmosphere = 2.612 X 10-19 electron volts
1 erg = 1 X 10-7 joule = 2.3901 X 10-8 calorie
1 electron volt = 1.6022 X 10-19 joule = 1.6022 X 10-12 erg = 96.487 kJ/mol
1 liter atmosphere = 24.217 calories = 101.32 joules = 1.0132 X 109 ergs
1 British Thermal Unit = 1055.06 joules = 1.05506 X 1010 ergs = 252.2 calories
Gas Constant
Gas Constant
R = 1.987 cal/mol K = 8.314 (N/m2) (m3)/ mol K = 0.08205 liter ·atm/ mole K
Common units of Temperature
Common units of Temperature
1 centigrade or Celsius degree = 1.8 Fahrenheit degree
Temperature, Kelvin = T°C + 273.15
Temperature, Fahrenheit = 9/5 °C +32
Temperature, centigrade or Celsius = 5/9 (°F-32)
Transmittance to Absorbance Conversion
Transmittance to Absorbance Conversion
A = 2.00-log %T
Temperature, Kelvin = T°C + 273.15
%T = %Transmittance
Particle size Conversion
Particle size Conversion Concentrations
| Approximate Millimeter | Mesh Size | Approximate MicroneSize |
|---|---|---|
| 0.010 | 850 | 10 |
| 0.020 | 635 | 20 |
| 0.038 | 400 | 38 |
| 0.045 | 325 | 45 |
| 0.053 | 270 | 53 |
| 0.063 | 230 | 63 |
| 0.075 | 200 | 75 |
| 0.090 | 170 | 90 |
| 0.106 | 140 | 106 |
| 0.125 | 120 | 125 |
| 0.150 | 100 | 150 |
| 0.180 | 80 | 180 |
| 0.212 | 70 | 212 |
| 0.250 | 60 | 250 |
| 0.300 | 50 | 300 |
| 0.355 | 45 | 355 |
| 0.425 | 40 | 425 |
| 0.500 | 35 | 500 |
| 0.600 | 30 | 600 |
| 0.710 | 25 | 710 |
| 0.850 | 20 | 850 |
| 1.180 | 16 | 1180 |
| 1.400 | 14 | 1400 |
| 2.000 | 10 | 2000 |
| 2.360 | 8 | 2360 |
| 2.800 | 7 | 2800 |
| 3.350 | 6 | 3350 |
| 4.000 | 5 | 4000 |
| 4.750 | 4 | 4750 |
| 0.425 | 40 | 425 |
| 0.500 | 35 | 500 |
| 0.600 | 30 | 600 |