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Unit Conversion Tables
The following tables provide multiplication factors for converting
values of a physical quantity from one unit to another. The tables
are not comprehensive but include many of the units commonly encountered
in water treatment.
Conversion Factors for
Temperature
|
From |
To |
Formula |
| Fahrenheit (ºF) |
Celsius (ºC) |
(ºF-32) x 0.556 |
| Celsius (ºC) |
Fahrenheit (ºF) |
1.8 x ºC + 32 |
Conversion Factors for
Units of Area
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| cm² |
in² |
0.155 |
6.452 |
| cm² |
ft² |
0.001 08 |
929.03 |
| m² |
ft² |
10.764 |
0.0929 |
| in² |
ft² |
0.006 94 |
144 |
Conversion Factors for
Units of Concentration
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| mg/dL |
ppm |
10 |
0.1 |
| mg/dL |
g/L |
0.01 |
100 |
| mg/L |
% |
0.0001 |
10,000 |
| mg/L |
ppm |
1 |
1 |
| g/L |
% |
0.1 |
10 |
Conversion Factors for
Units of Flow Rate
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| gpm |
L/min |
3.785 |
0.2642 |
| ft³/min |
L/min |
28.32 |
0.0353 |
| ft³/min |
gpm |
7.481 |
0.1337 |
Conversion Factors for
Units of Length
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| cm |
in |
0.3937 |
2.54 |
| cm |
ft |
0.032 81 |
30.48 |
| meters |
ft |
3.281 |
0.3048 |
Conversion Factors for
Units of Mass
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| g |
lb |
0.0022 |
453.6 |
| kg |
lb |
2.205 |
0.4536 |
Conversion Factors for
Units of Pressure
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| psi (lb/in²) |
ft H2O |
2.307 |
0.4335 |
| psi |
kPa |
6.895 |
0.145 |
Conversion Factors for
Units of Velocity
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| ft/min |
cm/sec |
0.508 |
1.969 |
| ft/sec |
cm/sec |
30.48 |
0.0328 |
| ft/min |
gpm/ft² |
7.481 |
0.1337 |
| ft/sec |
gpm/ft² |
448.9 |
0.002 23 |
| cm/sec |
gpm/ft² |
14.73 |
0.0679 |
Conversion Factors for
Units of Volume
|
Unit A |
Unit B |
To Convert from A to B, multiply A by: |
To Convert from B to A, multiply B by: |
| gal |
L |
3.785 |
0.2642 |
| gal |
ft³ |
0.1337 |
7.481 |
| gal |
M³ |
0.003785 |
264.2 |
| ft³ |
L |
28.32 |
0.035 32 |
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