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Unit of Measure

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Avoirdupois Weight

AVOIRDUPOIS WEIGHT
27-11/32 grains 1 dram
16 drams 1 ounce
16 ounces 1 pound
25 pounds 1 quarter
4 quarters 1 cwt.
2,000 pounds 1 short ton
2,240 pounds 1 long ton

Cubic Measure

CUBIC MEASURE
1 cubic centimeter 0.061 cubic inch
1 cubic inch 16.39 cubic cent
1 cubic decimeter 0.0353 cubic foot
1 cubic foot 28.317 cubic dec.
1 cubic meter 1.308 cubic yards
1 cubic yard 0.7646 cubic meter
1 stere 0.2759 cord
1 cord 3.624 steres
1 liter 0.906 qt. Dry = 1.0567 qts. Liquid
1 quart dry 1.101 liters
1 quart liquid 0.9463 liter
1 dekaliter 2.6417 gallons = 1.135 pecks
1 gallon 0.375 dekaliter
1 peck 0.881 dekaliter
1 hekoliter 2.8375 bushels
1 bushel 0.3524 hekaliter

Force

FORCE
1 pound force 1 slug x 1 foot sec/sec
1 dyne 1 gram x 1 centimeter sec/sec
1 newton 1 kilogram x 1 meter sec/sec
1 pound force 4.452 newtons
1 newton 100.000 dynes = 0.224 pounds force
1 gram force 980.6 dynes

Geometric Figures

GEOMETRIC FIGURES
Area of a circle D2 x 0.7854 = π r2 (r = radius)
Circumference of a circle π D or 2π r
Area of a sphere π D2 - 4π r2 (D + diameter)
Area of a triangle 1/2 altitude x base
Volume of a cone area of base x 1/3 alititude
Area of a trapezoid 1/2 (sum of parallel sides) x altitude

Imperial Liquid Measure

IMPERIAL LIQUID MEASURE
1 U.S. gallon .883 Imperial gallon
1 U.S. gallon 3.785 liters
1 Imperial gallon 1.201 U.S. gallons
1 Imperial gallon 4.546 liters
1 liter 0.264 U.S. gallons
1 liter 0.220 Imperial gallon

International Electrical Units

INTERNATIONAL ELECTRICAL UNITS
1 international ohm 1.000495 absolute ohms
1 international volt 1.00033 absolute volts
1 international ampere 0.999835 absolute ampere
1 international coulomb 0.999835 absolute coulomb
1 international henry 1.000495 absolute henries
1 international farad 0.999505 absolute farad
1 international watt 1.000165 absolute watts
1 international joule 1.000165 absolute joules

Lengtd

LENGtd
1 centimeter 0.3937 inches = 0.0328 feet
1 meter 39.37 inches = 3.28 feet
1 kilometer 0.62137 miles = 3280 feet
1 inch 2.54 centimeters
1 foot 0.3048 meters
1 mil 0.001 inch
1 mile 5280 feet = 1760 yards = 1.609 kilometers
1 yard 0.9144 meter
1 dekameter 1.9884 rods
1 rod 0.5029 dekameters

Liquid Weight

LIQUID WEIGHT
4 gils 1 pint
2 pints 1 quart
4 quarts 1 gallon
31-1/2 gallons 1 barrel

Dry Measure

DRY MEASURE
2 pints 1 quart
8 quarts 1 peck
4 pecks 1 bushel

Long Measure

LONG MEASURE
12 inches 1 foot
3 feet 1 yard
5 1/2 yards 1 rod
40 rods 1 furlong
8 furlongs 1 statue mile
3 miles 1 league

Mariner's Measure

MARINER'S MEASURE
6 feet 1 fatdom
120 fatdoms 1 cable lengtd
7-1/3 cable lengtds 1 mile
5,280 feet 1 statue mile
6,080.2 feet 1 nautical mile

Mass

MASS
1 slug 32.2 pounds mass = 14.606 kilograms
1 pound mass 453.6 grams

Metric System Prefixes

METRIC SYSTEM PREFIXES
Mega 1,000,000
Kilo 1,000
Hecto 100
Deka 10
Deci .10
Centi .01
Milli 0.001
Micro 0.000001

Miscellaneous Constants

MISCELLANEOUS CONSTANTS
Loge X 2.30259 log10 X
Electronic charge 4.8 x 10-10 e.s.u. = 1.60 x 10-20 e.m.u.
Mass units 1.07 x 10-3 x Mev = 6.71 x 10-2 ergs
Speed of light 3 x 108 meters/sec
Speed of sound (in air at sea level) 1100 ft/sec
π 3.14159
e 2.71828

Power

POWER
1 Watt 1 joule/sec
1 horsepower 550 ft. lb/sec = 716 watts
1 Watt 3.412 BTU/hr = 0.239 gram calorie/sec
P(watts) R (ohms) x I (amperes)2
P(watts) E (volts)2 / R (ohms)

Pressure

PRESSURE
1 atmosphere 14.69 ponuds/sq inch = 29.92 in. of Hg
1 atmosphere 76 cm of Hg = 33.9 ft of water
1 in. Hg 0.491 pounds/sq. in
Water Pressure pounds/sq. in head in ft x 0.434

Square Measure

SQUARE MEASURE
1 sq. mile 2.59 kilometers
1 circular mil 0.7854 sq. mils
1 sq. inch 1,000,000 sq. mils
1 sq. decimeter 0.1076 sq. foot
1 acre 60 sq. rod
1 sq. cm 0.155 sq. inches
1 sq. meter 1.196 sq. yards = 10.784 sq. ft
1 sq. kilometer 0.386 sq. miles
1 sq. inch 6.452 sq. centimeters
1 sq. foot 929.03 sq. cm = 0.092903 sq. meters
1 sq. yard 0.8361 sq. meters

Temperature Conversion

TEMPERATURE CONVERSION
°C = 5/9 (°F - 32)
°F = 9/5 (°C + 32)

Time

TIME
1 day 86,400 seconds
1 year 8760 hours (approx.)

Angles

ANGLES
1 circle 360 degrees
1 radian 57.3 degrees
1 degree 8760 0.01745 radians

Troy Weight

TROY WEIGHT
24 grains 1 pwt.
20 pwt 1 ounce
12 ounces 1 pound
(Used for weighing gold, silver, and jewels)

Weights

WEIGHTS
1 gram 0.03527 ounce
1 ounce 28.35 grams
1 kilogram 2.2046 pounds
1 pound 0.4536 kilogram
1 metric ton 0.98421 English ton
1 English ton 1.016 metric ton

Work & Energy