H
• Hand = 4 inches, 10.160 centimeters.
• Hectare = 2.471044 acres, 2.471058
Br acres, 395.367 square rods, 1.195985x10^4
square yards, 1.0764x10^5 square feet, 100 ares,
1x10^4 square meters.
• Hectogram = 3.52739 avoirdupois ounces,
100 grams.
• Hectoliter = 2.8378 bushels, 2.7497
Br bushels, 11.3513 pecks, 100 liters.
• Hectometer = 19.8838 rods, 109.3611
yards, 109.3614 Br yards, 328.08 feet, 100 meters.
• Hectowatt = 100 watts.
• Hemisphere = 0.5 sphere, 4 spherical
right angles, 6.2832 steradians.
• Hogshead (Br) = 63 Br gallons, 10.114
cubic feet, 0.28640 cubic meters.
• Hogshead (US) = 63 gallons, 8.4218
cubic feet, 0.23848 cubic meters.
• Horsepower = 0.70696 BTU (mean),
0.7452 kilowatt (g=980), 0.74570 kilowatt (g=980.665),
1.0139 horse power (metric) or cheval-vapeur,
10.688 kilogram-calories (mean) per minute,
42.418 BTU (mean) per minute, 550 foot-pounds
per second, 745.2 watts (g=908), 745.70 watts
(g=980.665), 3.3000x10^4 foot-pounds per minute.
• Horsepower, electrical (US and BR)
= 746.00 watt (absolute) commonly used in rating
electrical machinery.
• Horsepower, metric (cheval vapeur)
= 0.98632 horsepower (US), 75 kilogram-meters
per second, 735.399 watts, 3.2549x10^4 foot-pounds
per minute.
• Horsepower-hour = 0.7457 kilowatt-hour,
641.3 kilogram-calories (mean), 745.7 watt-hours,
2545.0 BTU (mean), 2.7374x10^5 kilogram-meters,
1.9800x10^6 foot-pounds, 2.6845x10^6 joules
(absolute).
• Horsepower-hour (electrical, US and BR)
= 2.6856x10^6 joules (absolute).
• Hour (tropical mean solar) = 0.0059524
week, 0.041667 mean solar day, 60 mean solar
minutes, 3600 mean solar seconds.
• Hundredweight (short) = 100 pounds,
0.44643 long ton, 0.05 short ton, 4 Br quarters,
1600 avoirdupois ounces, 0.0453592 metric ton,
45.3592 kilograms.
• Hundredweight (long) = 112 pounds,
0.05 long ton, 4 Br quarters, 50.8023 kilograms.
I
• Inch (US) = 1.57828x10^-5 mile, 0.00126263
Gunter's chain, 0.00505051 rod, 1/36 yard, 1/12
foot, 0.126263 Gunter's link, 72 points (printer's
type), 1000 mils, 2.540005 centimeters, 25.40005
millimeters, 2.54x10^8 Angstrom unit, 39450.33
wave lengths of red line of cadmium.
• Inch (Br) = 1/36 Br yard, 1/9 Br
linear quarter, 2.539998 centimeters, 25.39998
millimeter.
• Inch (Paris) = 1 Pouce.
• Inch of Hg (pressure) at 32 degrees F
= 0.033421 atmosphere, 0.49116 pound per square
inch, 1.13299 feet of water at 39.1 degrees
F, 13.595 inches of water at 4 degrees C, 70.727
pounds per square foot, 345.31 kilograms per
square meter, 3.38639x10^4 dynes per square
centimeter.
• Inch of water (pressure) at 4 degrees
C = 0.0024583 atmosphere, 0.036136 pounds
per square inch, 0.07 3554 inch of Hg, 0.57818
ounce per square inch, 5.2022 pounds per square
foot, 25.399 kilograms per square meter, 2490.82
dynes per square centimeter.
J
• Joule (absolute) = 2.778x10^-7 kilowatt-hour,
3.725x10^-7 horse power-hour, 2.3889x10^-4 kilogram-calorie
(mean), 2.778x10^-4 watt-hour, 3.485x10^-4 cubic
foot-atmosphere, 9.480x10^-4 BTU (mean), 0.009869
liter-atmosphere, 0.10197 kilogram-meter, 0.23889
gram-calorie (mean), 0.23895 gram-calorie at
15°C, 0.23918 gram-calorie at 20°C,
0.73756 foot-pound; 0.999680 joule (Int'l),
1 watt-second, 1 newton-meter, 23.730 foot-poundals,
1.0197x10^4 gram-centimeters; 1x10^7 ergs, 1x10^7
dyne-centimeter.
• Joule (Int'l) = 1.00032 joule (absolute).
K
• Kilderkin = 18 Br gallons, 0.081830
cubic meter.
• Kilogram = 9.842064x10^-4 long ton,
0.0011023112 short ton, 0.001 metric ton, 0.019684
long hundredweight, 0.022046223 short hundredweight,
0.07874 Br quarter, 2.2046223 avoirdupois pounds,
2.6792285 apothecary or troy pounds, 32.150742
apothecary or troy ounces, 35.273957 avoirdupois
ounces, 257.21 apothecary or troy dram, 564.38
avoirdupois dram, 643.01 pennyweight, 771.62
scruples, 1.54324x10^4 grains, 1000 grams.
• Kilogram-calorie or large calorie (mean)
= 0.0011628 kilowatt-hour, 0.0015593 horse power-hour,
1.1628 watt-hour, 3.9685 BTU (mean), 426.85
kilogram-meters, 1000 small or gram-calories,
3087.4 foot-pounds, 4186 joules, 4.2686x10^7
gram-centimeters, 4.186x10^10 ergs.
• Kilogram-meter = 2.7235x10^-6 kilowatt
hour, 3.6530x10^-6 horse power-hour, 0.0027235
watt-hour, 0.0034177 cubic foot-atmosphere,
0.0092972 BTU (mean), 0.096782 liter-atmosphere,
2.3427 gram-calories (mean), 7.2330 foot-pounds,
9.80665 joules (absolute); 232.71 foot-poundals,
1x10^5 gram-centimeters, 9.80665x10^7 ergs.
• Kiloliter = 1.3080 cubic yards, 35.316
cubic feet, 264.18 gallons, 1.000027 cubic meters,
1000 liters.
• Kilometer = 1.0567x10^-13 light year,
0.53996 nautical mile, 0.62137 statute mile,
1093.6 yards, 3280.8 feet, 0.1 myriameter, 1000
meters, 1x10^5 centimeters.
• KiloPascal = 9.869x10^-3 Standard
Atmospheres, 0.14515 psi.
• Kilowatt = 0.23889 kilogram-calorie
(mean) per second, 0.94827 BTU (mean), 1.3410
horsepower, 1.3597 horse power (metric), 14.333
kilogram-calories (mean) per minute, 56.896
BTU (mean) per minute, 737.56 foot-pounds per
second, 1000 watts, 2.6552x10^6 foot-pounds
per hour.
• Kilowatt-hour = 1.3410 horse power-hours;
1000 watt-hours, 3413.0 BTU (mean), 3.6710x10^5
kilogram-meters, 8.6001x10^5 gram-calories (mean)
2.6552x10^6 foot-pounds, 3.6000x10^6 joules
(absolute).
• Knot (as a unit of length) = 1 nautical
mile.
• Knot (velocity) = 1 nautical mile
per hour, 1.1516 miles per hour, 1.689 feet
per second, 1.853 kilometers per hour, 51.48
centimeters per second., 6080.20 feet per hour.
L
• Large calorie = See kilogram-calorie.
• Last (Br) = 80 bushels (variable),
2.9095 cubic meters.
• League (statute) = 3 statute miles,
4.8280 kilometers.
• League (nautical) = 3 nautical miles,
5.5560 kilometers.
• Light (speed of) = 2.9986x10^10 centimeters
per second.
• Light Year = 5.9x10^12 miles, 9.4637x10^12
kilometers.
• Ligne (Paris line) = 1/12 pouce or
Paris inch, 0.22583 centimeter.
• Line (Br) = 1/12 inch, 0.21167 centimeters.
• Link (Engineer's or Ramden's) = 0.01
Engineer's chain, 1 foot, 12 inches, 30.480
centimeters.
• Link (Surveyor's or Gunter's) = 1.25x10^-4
miles, 0.01 Gunter's chain, 0.04 rod, .22 yards,
0.66 foot, 7.92 inches, 0.2011684 meter, 20.11684
centimeter.
• Liter = 0.0013080 cubic yard, 0.028378
bushel, 0.027497 Br bushel, 0.26417762 gallon,
0.21998 Br gallon, 0.035316 cubic feet, 0.11351
peck, 0.10999 Br peck, 0.908102 dry quart, 1.056710
liquid quarts, 0.87990 Br quart, 1.8162 dry
pints, 2.1134 liquid pints, 1.7598 Br pints,
8.4538 gills, 7.0392 Br gills, 33.8147 fluid
ounces, 35.196 Br fluid ounces, 61.025 cubic
inches, 270.5179 fluid drams, 0.001000027 cubic
meter, 1.000027 cubic decimeter, 1000.027 cubic
centimeter.
• Liter-atmosphere (normal) = 3.7745x10^-5
horse power-hour, 0.035319 cubic foot-atmosphere,
0.09607 BTU (mean), 10.333 kilogram-meters,
24.206 gram-calories (mean), 74.735 foot-pounds,
101.328 joules (absolute), 2404.5 foot-poundals.
• Liter-atmosphere (lat. 45°, g=980.616)
= 101.323 joules (absolute).
• La livre (French Pound) = 0.5 kg.
• Lumen = 0.001496 watt.
M
• Mean Solar Day = 1440 minutes, 86,400
seconds.
• Megalerg = 1x10^6 ergs.
• Megameter = 1x10^6 meter.
• Meter = 5.3996x10^-4 nautical mile,
6.2137x10^-4 statute mile, 0.00497096 furlong,
0.0497096 Gunter's chain, 0.198838 rod, 0.54681
fathom, 1.093611 yard, 1.093614 Br yard, 3.280833
feet, 3.280843 Br feet, 3.0784 Fr pied, 4.970960
Gunter's links, 39.3700 inches, 39.3701 Br inches,
1x10^06 megameter, 0.001 kilometer, 100 centimeters,
1x10^9 millimicrons (micromillimeter), 1x10^10
angstrom units, 1x10^12 millionth microns, 1.55316413x10^6
wavelength of red line of cadmium.
• Metric Ton = 1 tonne, 1 millier.
• Microgram = 1x10^-6 gram, 0.001 milligram.
• Microliter = 1x10^-6 liter.
• Micromicron = 1x10^-12 meter.
• Microradian = 0.206265 seconds.
• Micron = 3.937x10^-5 inch, 0.039370
mil, 39.37 millionths of an inch, 1x10^-6 meter,
1x10^-4 centimeter, 0.001 millimeter, 1000 milli-microns
(micro-millimeters), 1x10^4 Angstrom units.
• Mil = 0.001 inch, 0.00254001 centimeter,
0.0254001 millimeter, 25.4001 microns.
• Mil (Angular) = 1x10^-3 radians.
• Mil (Military) = 360/6400 degrees.
• Mile (statute) = 1.69x10^-13 light
year, 0.86898 nautical mile, 8 furlongs, 80
Gunter's chains, 320 rods, 1760 yards, 5280
feet, 8000 Gunter's links, 6.3360x10^4 inches,
0.160935 myriameters, 1.60935 kilometers, 1609.35
meters.
• Mile (nautical) = The length of 1
minute of arc on the earth's surface at the
equator, 1/3 league, 1.15078 statute miles,
2025.37 yards, 6076.12 feet, 1.8520 kilometers.
• Mile (British) = 1.60934 kilometers.
• Millier = 1 tonne, 1 metric ton.
• Milligram = 2.2046x10^-6 avoirdupois
pound, 2.67923x10^-6 apothecary or troy pound,
3.52739x10^-5 avoirdupois ounce, 3.215074x10^-5
apothecary or troy ounce, 5.64383x10^-4 avoirdupois
dram, 2.57206x10^-4 apothecary or troy dram,
6.43015x10^-4 pennyweight, 7.71618x10^-4 scruple,
0.01543236 grains, 1x10^-6 kilogram, 0.001 gram,
0.005 metric carat.
• Milliliter = 0.0084538 gill, 0.0338147
fluid ounce, 0.035196 fluid Br ounce, 0.061025
cubic inch, 0.2705179 fluid dram, 16.2311 minims,
0.001 liter, 1.000027 cubic centimeter.
• Millimeter = 0.0393700 inch, 0.0393701
Br inch, 39.37 mils, 0.001 meter, 0.1 centimeter,
1000 microns.
• Milli-micron = 1 micro-millimeter,
1x10^-9 meter, 1x10^-7 centimeter, 0.001 micron,
10 Angstrom units.
• Millionth Micron = 1 micromicron,
1x10^-12 meter, 1x10^-10 centimeter, 0.01 Angstrom
units.
• Miner's Inch = 1.5 cubic feet per
minute or 11.25 GPM (in AZ CA MT NV OR), 1.2
cubic feet per minute or 9.0 GPM (in ID KS NE
NM ND SD UT).
• Minim (fluid US) = 1/61440 gallon,
1.3021x10^-4 liquid pint, 5.2083x10^-4 gill,
1/480 fluid ounce, 1/60 fluid dram, 0.061610
milliliter, 0.061612 cubic centimeter, 61.612
cubic millimeter.
• Minim (Br) = 0.059194 cubic centimeter.
• Minute (angle) = 1.8519x10^-4 quadrant,
2.90888x10^-4 radian, 1/60 degree, 60 seconds.
• Minute (time) = 9.9206x10^-5 week,
6.94446x10^-4 days, 0.016667 hour, 60 seconds.
• Month (mean calendar) = 30.42 days,
730 hours, 4.38x10^4 minutes, 2.628x10^6 seconds.
• Month (lunar) = 29 days 12 hours
44 minutes.
• Myriagram = 22.04622 avoirdupois
pounds, 10 kilograms, 1x10^4 grams.
