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 |
1 pound = 453.5924 grams
1 pound = 453.5924 grams = 0.45359 kilograms = 7000 grains
1 kilogram = 1000 grams = 2.205 pounds
1 gram = 10 decigrams = 100 centigrams = 1000 milligrams
1 metric ton = 1000 kilograms = 2204.62 pounds
1 inch = 2.54 centimeters
1 mile = 5280 feet = 1.609 kilometers = 0.3048 meters
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 mile
1 angstrom = 1.0 X 10-8 centimeter = 0.10 nanometer = 1.0 X 10-10 meter
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
Unit | N·m-2 (Pa) | bar | atm | Torr (mm Hg) | lbs/sq.in. (psi) |
---|---|---|---|---|---|
1 N·m-2 (1 Pa) |
1 | 10-5 | 9.8692X10-6 | 7.50062 X 10-3 | 1.45038 X 10-4 |
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 | 1.333224 X 10-3 | 1.31579 X 10-3 | 1 | 1.93368 X 10-2 |
10 lbs/sq.in. (psi) | 68948 | 0.68948 | 0.68046 | 517.148 | 10 |
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
R = 1.987 cal/mol K = 8.314 (N/m2) (m3)/ mol K = 0.08205 liter ·atm/ mole K
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)
To view complete detail of Common Units of Temperature Click here.
A = 2.00-log %T
Temperature, Kelvin = T°C + 273.15
%T = %Transmittance
To view complete detail of Transmittance to Absorbance Click here.
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 |
1.000 | 18 | 1000 |
1.180 | 16 | 1180 |
1.400 | 14 | 1400 |
1.700 | 12 | 1700 |
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 |