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This list is based on Basic Units and Derived Units. I use the standard Multiples of Ten where appropriate.
If you find any errors or can't find some unit; email me and I will include the conversion.
| To Convert | To | Multiply By |
| acres | ft2 | 43560 |
| acres | m2 | 4046.9 |
| acres | rods2 | 160 |
| acres | hectares | .4047 |
| acre feet | barrels | 7758 |
| acre feet | m3 | 1233.5 |
| angstrom, å | cm | 10-8 |
| angstrom, å | nm | 0.1 |
| astronomical unit, AU | cm | 1.496E13 |
| astronomical unit | Tm | 0.1496 |
| atmospheres (atm) | feet of water | 33.94 |
| atmospheres | in of Hg | 29.92 |
| atmospheres | mm of Hg | 760 |
| atmospheres | psi | 14.7 |
| bar | atm | .98692 |
| bar | dyne cm-2 | 106 |
| bar | psi (lb in-2) | 14.5038 |
| bar | mm Hg | 750.06 |
| bar | MPa | 10-1 |
| barrel (bbl) | ft3 | 5.6146 |
| barrel | m3 | .15898 |
| barrel | gal (US) | 42 |
| barrel | liter | 158.9 |
| BTU | Canadian BTU | 1.000418022 |
| BTU | ISO BTU | 1.000527124 |
| BTU | cal | 251.996 |
| BTU | erg | 1.055055853 * 1010 |
| BTU | joule | 1054.35 |
| calorie (gm) (cal) | joule | 4.184 |
| centimeter (cm) | inch | 0.39370 |
| cm | m | 10-2 |
| darcy | m2 | 9.8697E-13 |
| dyne | g cm s-2 | 1 |
| dyne | Newton | 10-5 |
| erg | cal | 2.39006E-8 |
| erg | dyne cm | 1 |
| erg | joule | 10-7 |
| fathom (fath) | ft | 6 |
| feet (ft) | in | 12 |
| feet | m | 0.3048 |
| furlong | yd | 220 |
| gallon (US) (gal) | in3 | 231 |
| gallon | liter | 3.78541 |
| gallon (Imp.) (gal) | in3 | 277.419 |
| gallon | liter | 4.54608 |
| gamma | gauss | 10-5 |
| gamma | tesla | 10-9 |
| gauss | tesla | 10-4 |
| gram (g) | pound | 0.0022046 |
| gram | kg | 10-3 |
| hectare | acre | 2.47105 |
| hectare | cm2 | 108 |
| horsepower | W | 745.700 |
| inch (in) | cm | 2.54 |
| inch (in) | mm | 25.4 |
| joule (J) | erg | 107 |
| joule | cal | 0.239006 |
| kilogram (kg) | g | 103 |
| kilogram | pound | 2.20462 |
| kilometer (km) | m | 103 |
| kilometer | ft | 3280.84 |
| kilometer | mile | 0.621371 |
| kilometer hr-1 (kph) | mile hr-1 (mph) | 0.621371 |
| kilowatt | hp | 1.34102 |
| knot | mph | 1.150779 |
| liter | cm3 | 103 |
| liter | gal (US) | 0.26417 |
| liter | in3 | 61.0237 |
| meter | angstrom | 1 x 1010 |
| meter | ft | 3.28084 |
| micron | cm | 10-4 |
| mile | ft | 5280 |
| mile | km | 1.60934 |
| mm Hg | dyne cm-2 | 1333.22 |
| Newton | dyne | 105 |
| Newton | pound (lbf) | 0.224809 |
| Newton-meter (torque) | foot-pound-force | .737562 |
| ounce | lb | 0.0625 |
| Pascal | atmospheres | 9.86923 * 10-6 |
| Pascal | psi | 1.45 * 10-4 |
| Pascal | torr | 7.501 * 10-3 |
| pint | gallon | 0.125 |
| poise | g cm-1 s-1 | 1 |
| poise | kg m-1 s-1 | 0.1 |
| pound (lbm) | kg | 0.453592 |
| pound (lbf) | newton | 4.4475 |
| rod | feet | 16.5 |
| quart | gallon | 0.25 |
| stoke | cm2 s-1 | 1 |
| slug | kg | 14.594 |
| tesla | gauss | 104 |
| Torr | Millibar | 1.333224 |
| Torr | Millimeter of Hg | 1 |
| ton (long) | lb | 2240 |
| ton (Metric) | lb | 2205 |
| ton (Metric) | kg | 1000 |
| ton (short or net) | lb | 2000 |
| ton (short or net) | kg | 907.185 |
| ton (short or net) | ton (Metric) | .907 |
| watt | J s-1 | 1 |
| yard | in | 36 |
| yard | m | 0.9144 |
| year (cal) | days | 365.242198781 |
| year (cal) | s | 3.15576 x 107 |
| Length | meter | m |
| Time | second | s |
| Mass | kilogram | kg |
| Temperature | Kelvin | K |
| Electrical Current | ampere | A |
| Force | Newton | N | kg m s-2 |
| Energy | joule | J | kg m2 s-2 |
| Power | watt | W | kg m2 s-3 |
| Frequency | hertz | Hz | s-1 |
| Charge | coulomb | C | A s |
| Capacitance | farad | F | C2 s2 kg-1 m-2 |
| Magnetic Induction | tesla | T | kg A-1 s-2 |
| 10-12 | pico | p |
| 10-9 | nano | n |
| 10-6 | micro | µ |
| 10-3 | milli | m |
| 103 | kilo | k |
| 106 | mega | M |
| 109 | giga | G |
| 1012 | tera | T |
While these multipliers are most often used with metric basic or derived units, the multipliers are sometimes used with english units, creating confusing combinations.
Examples are kip which stands for kilopounds (1000 pounds) and ksi which is a combination of k and psi resulting in thousands of psi.
Back to My Home Page
Who I Am
Material Properties
My On-Line Resume