measurement
Measurement is defined as the act of measuring or the size of something.
(noun)- An example of measurement means the use of a ruler to determine the length of a piece of paper.
- An example of measurement is 15" by 25".
See measurement in Webster's New World College Dictionary
noun
- a measuring or being measured; mensuration
- extent, quality, or size as determined by measuring; dimension: a waist measurement of 32 inches
- a system of measuring or of measures
See measurement in American Heritage Dictionary 4
noun
- The act of measuring or the process of being measured.
- A system of measuring: measurement in miles.
- The dimension, quantity, or capacity determined by measuring: the measurements of a room.
Conversion From U.S. Customary to Metric units
| When You Know | Multiply By | To Find |
|---|---|---|
| inches | 25.4 | millimeters |
| 2.54 | centimeters | |
| feet | 30.48 | centimeters |
| yards | 0.91 | meters |
| miles | 1.61 | kilometers |
| teaspoons | 4.93 | milliliters |
| tablespoons | 14.79 | milliliters |
| fluid ounces | 29.57 | milliliters |
| cups | 0.24 | liters |
| pints (liquid) | 0.47 | liters (liquid) |
| quarts (liquid) | 0.95 | liters (liquid) |
| gallons | 3.79 | liters |
| cubic feet | 0.028 | cubic meters |
| cubic yards | 0.76 | cubic meters |
| ounces | 28.35 | grams |
| pounds | 0.45 | kilograms |
| short tons (2,000 lbs) | 0.91 | metric tons |
| square inches | 6.45 | square centimeters |
| square feet | 0.09 | square meters |
| square yards | 0.84 | square meters |
| square miles | 2.60 | square kilometers |
| acres | 0.40 | hectacres |
From Metric to U.S. Customary Units
| When You Know | Multiply By | To Find |
|---|---|---|
| millimeters | 0.04 | inches |
| centimeters | 0.39 | inches |
| meters | 3.28 | feet |
| 1.09 | yards | |
| kilometers | 0.62 | miles |
| milliliters | 0.20 | teaspoons |
| 0.06 | tablespoons | |
| 0.03 | fluid ounces | |
| liters (liquid) | 1.06 | quarts (liquid) |
| 0.26 | gallons | |
| 4.23 | cups | |
| 2.12 | pints (liquid) | |
| cubic meters | 35.32 | cubic feet |
| 1.35 | cubic yards | |
| grams | 0.035 | ounces |
| kilograms | 2.21 | pounds |
| metric ton (1,000 kg) | 1.10 | short ton |
| square centimeters | 0.16 | square inches |
| square meters | 1.20 | square yards |
| square kilometers | 0.39 | square miles |
| hectacres | 2.47 | acres |
Temperature Conversion Between Celsius and Fahrenheit
| °C = (°F - 32) ÷ 1.8 |
| °F = (°C × 1.8) + 32 |
| Condition | Fahrenheit | Celsius |
|---|---|---|
| Boiling point of water | 212° | 100° |
| A very hot day | 104° | 40° |
| Normal body temperature | 98.6° | 37° |
| A warm day | 86° | 30° |
| A mild day | 68° | 20° |
| A cool day | 50° | 10° |
| Freezing point of water | 32° | 0° |
| Lowest temperature Gabriel Fahrenheit could obtain by mixing salt and ice | 0° | -17.8° |
U.S. Customary System: Length
| Unit | Relation to Other U.S. Customary Units | Metric Equivalent |
|---|---|---|
| inch | 1/12 foot | 2.54 centimeters |
| foot | 12 inches or 1/3 yard | 0.3048 meter |
| yard | 36 inches or 3 feet | 0.9144 meter |
| rod | 16 1/2 feet or 5 1/2 yards | 5.0292 meters |
| furlong | 220 yards or 1/8 mile | 0.2012 kilometer |
| mile (statute) | 5,280 feet or 1,760 yards | 1.6093 kilometers |
| mile (nautical) | 2,025 yards | 1.852 kilometers |
U.S. Customary System: Volume or Capacity (Liquid Measure)
| Unit | Relation to Other U.S. Customary Units | Metric Equivalent |
|---|---|---|
| ounce | 1/16 pint | 29.574 milliliters |
| gill | 4 ounces | 0.1183 liter |
| pint | 16 ounces | 0.4732 liter |
| quart | 2 pints or 1/4 gallon | 0.9463 liter |
| gallon | 128 ounces or 8 pints | 3.7853 liters |
| barrel | ||
| (wine) | 31 1/2 gallons | 119.24 liters |
| (beer) | 36 gallons | 136.27 liters |
| (oil) | 42 gallons | 158.99 liters |
U.S. Customary System: Volume or Capacity (Dry Measure)
| Unit | Relation to Other U.S. Customary Units | Metric Equivalent |
|---|---|---|
| pint | 1/2 quart | 0.5506 liter |
| quart | 2 pints | 1.1012 liters |
| peck | 8 quarts or 1/4 bushel | 8.8098 liters |
| bucket | 2 pecks | 17.620 liters |
| bushel | 2 buckets or 4 pecks | 35.239 liters |
U.S. Customary System: Weight
| Unit | Relation to Other U.S. Customary Units | Metric Equivalent |
|---|---|---|
| grain | 1/7000 pound | 64.799 milligrams |
| dram | 1/16 ounce | 1.7718 grams |
| ounce | 16 drams | 28.350 grams |
| pound | 16 ounces | 453.6 grams |
| ton (short) | 2,000 pounds | 907.18 kilograms |
| ton (long) | 2,240 pounds | 1,016.0 kilograms |
U.S. Customary System: Geographic Area
| Unit | Relation to Other U.S. Customary Units | Metric Equivalent |
|---|---|---|
| acre | 4,840 square yards | 4,047 square meters |
Cooking Measures
| Unit | Relation to Other Cooking Measures | Conversion to Metric Units |
|---|---|---|
| drop | 1/76 teaspoon | 0.0649 milliliter |
| teaspoon | 76 drops or 1/3 tablespoon | 4.9288 milliliters |
| tablespoon | 3 teaspoons | 14.786 milliliters |
| cup | 16 tablespoons or 1/2 pint | 0.2366 liter |
| pint | 2 cups | 0.4732 liter |
| quart | 4 cups or 2 pints | 0.9463 liter |
British Imperial System: Volume or Capacity (Liquid Measure)
| Unit | Relation to Other British Imperial Units | Conversion to U.S. Customary Units | Conversion to Metric Units |
|---|---|---|---|
| pint | 1/2 quart | 1.201 pints | 0.5683 liter |
| quart | 2 pints or 1/4 gallon | 1.201 quarts | 1.137 liters |
| gallon | 8 pints or 4 quarts | 1.201 gallons | 4.546 liters |
British Imperial System: Volume or Capacity (Dry Measure)
| Unit | Relation to Other British Imperial Units | Conversion to U.S. Customary Units | Conversion to Metric Units |
|---|---|---|---|
| peck | 1/4 bushel | 1.0320 pecks | 9.092 liters |
| bushel | 4 pecks | 1.0320 bushels | 36.369 liters |
Apothecary Weights
| Unit | Relation to Other Apothecary Units | Conversion to U.S. Customary Units | Conversion to Metric Units |
|---|---|---|---|
| grain | 160 dram or 1/5760 pound | equal to the U.S. Customary grain | 64.799 milligrams |
| dram | 60 grains or 1/8 ounce | 2.1943 drams | 3.8879 grams |
| ounce | 8 drams | 1.0971 ounces | 31.1035 grams |
| pound | 12 ounces or 96 drams | 0.8232 pound | 373.242 grams |
Units of the International System
The International System (abbreviated SI, for Systeme International, the French name for the system) was adopted in 1960 by the 11th General Conference on Weights and Measures. An expanded and modified version of the metric system, International System addresses the needs of modern science for additional and more accurate units of measurement. The key features of the International System are decimalization, a system of prefixes, and a standard defined in terms of an invariable physical measure.
Base Units
The International System has base units from which all others in the system are derived. The standards for the base units, except for the kilogram, are defined by unchanging and reproducible physical occurences. For example, the meter is defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second. The standard for the kilogram is a platinum-iridium cylinder kept at the International Bureau of Weights and Standards in Sèvres, France.
| Unit | Quantity | Symbol |
|---|---|---|
| meter | length | m |
| kilogram | mass | kg |
| second | time | s |
| ampere | electric current | A |
| kelvin | temperature | K |
| mole | amount of matter | mol |
| candela | luminous intensity | cd |
Supplementary Units
The International System uses two supplementary units that are based on abstract geometrical concepts rather than physical standards.
| Unit | Quantity | Symbol |
|---|---|---|
| radian | plane angles | rad |
| steradian | solid angles | sr |
Prefixes
A multiple of a unit in the International System is formed by adding a prefix to the name of that unit. The prefixes change the magnitude of the unit by orders of ten from 1024 to 10-24.
| Prefix | Symbol | Multiplying Factor |
|---|---|---|
| yotta- | Y | 1024 = 1,000,000,000,000,000,000,000,000 |
| zetta- | Z | 1021 = 1,000,000,000,000,000,000,000 |
| exa- | E | 1018 = 1,000,000,000,000,000,000 |
| peta- | P | 1015 = 1,000,000,000,000,000 |
| tera- | T | 1012 = 1,000,000,000,000 |
| giga- | G | 109 = 1,000,000,000 |
| mega- | M | 106 = 1,000,000 |
| kilo- | K | 103 = 1,000 |
| hecto- | h | 102 = 100 |
| deca- | da | 10 = 10 |
| deci- | d | 10-1 = 0.1 |
| centi- | c | 10-2 = 0.01 |
| milli- | m | 10-3 = 0.001 |
| micro- | µ | 10-6 = 0.000,001 |
| nano- | n | 10-9 = 0.000,000,001 |
| pico- | p | 10-12 = 0.000,000,000,001 |
| femto- | f | 10-15 = 0.000,000,000,000,001 |
| atto- | a | 10-18 = 0.000,000,000,000,000,001 |
| zepto- | z | 10-21 = 0.000,000,000,000,000,000,001 |
| yocto- | y | 10-24 = 0.000,000,000,000,000,000,000,001 |
Additional Units
Listed below are a few of the non-SI units that are commonly used with the International System.
| Unit | Quantity | Symbol |
|---|---|---|
| angstrom (= 10-10m) | length | Å |
| electron-volt (= 0.160 aJ) | energy | eV |
| hectare (= 10,000 m2) | land area | ha |
| liter (= 1.0dm3) | volume or capacity | l |
| standard atmosphere (= 101.3 kPa) | pressure | atm |
Derived Units
Most of the units in the International System are derived units, that is units defined in terms of base units and supplementary units. Derived units can be divided into two groups - those that have a special name and symbol, and those that do not.
| Without Names and Symbols | |
|---|---|
| Measure of | Derivation |
| acceleration | m/s2 |
| angular acceleration | rad/s2 |
| angular velocity | rad/s |
| density | kg/m3 |
| electric field strength | V/m |
| luminance | cd/m2 |
| magnetic field strength | A/m |
| velocity | m/s |
| With Names and Symbols | |||
|---|---|---|---|
| Unit | Measure of | Symbol | Derivation |
| coulomb | electric charge | C | A·s |
| farad | electric capacitance | F | A·s/V |
| henry | inductance | H | V·s/A |
| hertz | frequency | Hz | cycles/s |
| joule | quantity of energy | J | N·m |
| lumen | flux of light | lm | cd·sr |
| lux | illumination | lx | lm/m2 |
| newton | force | N | kg·m/s2 |
| ohm | electric resistance | ω | V/A |
| pascal | pressure | Pa | N/m2 |
| tesla | magnetic flux density | T | Wb/m2 |
| volt | voltage | V | W/A |
| watt | power | W | J/s |
| weber | magnetic flux | Wb | V·s |
Copyright © 2000 by Houghton Mifflin Company
See measurement in Ologies
Measurement
See also instruments.
acetimetry
the measurement of the relative amount of acetic acid in a given subtance. —acetimetrical, adj.
Chemistry. the determination of the amount of free acid in a liquid. —acidimeter, n. —acidimetrical, adj.
measurement of pain by means of an algometer.
atmidometry
the measurement of evaporation in the air. —atmidometer, n.
autometry
1. the measurement of oneself.
2. the measurement of a part of a figure as a fraction of the total figure’s height. —autometric, adj.
baculometry
the measurement of distance or lines by means of a stave or staff.
chorometry
the science of land surveying.
chronoscopy
accurate measurement of short intervals of time by means of a chronoscope. —chronoscopic, adj.
cosmometry
the science of measuring the universe.
cryometry
the measurement of extremely low temperatures, by means of a cryometer.
cyclometry
the measurement of circles.
the measurement by a dosimeter of the dosage of radiation a per-son has received. See also drugs. —dosimetrist, n. —dosimetric, dosimetrical, adj.
erythrocytometry
measurement of the red blood cells in the blood, by use of an erythrocytometer.
the science of measuring and analyzing gases by means of a eudiometer.
the measurement of fluorescence, or visible radiation, by means of a fluorometer. —fluorometric, adj.
the measurement of the strength of electric currents, by means of a galvanometer. —galvanometric, galvanometrical, adj.
the measurement of the amounts of the gases in a mixture. —gasometer, n. —gasometric, gasometrical, adj.
the practice or theory of measuring angles, especially by means of a goniometer.
halometry
the measurement of the dimensions and angles of the planes of salt crystals. —halometer, n.
heliometry
the practice of measuring the angular distance between stars by means of a heliometer. —heliometric, heliometrical, adj.
horometry
the art or science of measuring time. —horometrical, adj.
the measurement of altitude and heights, especially with refer-ence to sea level. —hypsometric, hypsometrical, adj.
indigometry
the practice and art of determining the strength and coloring power of an indigo solution.
equality of measure. —isometric, isometrical, adj.
konimetry
the measurement of impurities in the air by means of a konimeter. —konimetric, adj.
1. the measuring and recording of variations in fluid pressure, as blood pressure.
2. the measuring and recording of the angular oscillations of an aircraft in flight, with respect to an axis or axes flxed in space. —kymograph, n. —kymographic, adj.
megameter
Rare. an instrument for measuring large objects. See also geography.
1. the act, process, or science of measurement.
2. the branch of geometry dealing with measurement of length, area, or volume. —mensurate, mensurational, adj.
the study and science of measures and weights. —metrologist, n. —metrological, adj.
osmometry
the measurement of osmotic pressure, or the force a dissolved substance exerts on a semipermeable membrane through which it cannot pass when separated by it from a pure solvent. —osmometric, adj.
osteometry
the measurement of bones.
oxidimetry
the determination or estimation of the quantity of oxide formed on a substance. —oxidimetric, adj.
pantometry
Obsolete, the realm of geometrical measurements, taken as a whole. —pantometer, n. —pantometric, pantometrical, adj.
the measurement of pressure or compressibility, as with a piezometer. —piezometric, adj.
plastometry
the measurement of the plasticity of materials, as with a plastometer. —plastometric, adj.
pulmometry
the measurement of the capacity of the lungs. —pulmometer, n.
the measurement of temperatures greater than 1500 degrees Celsius. —pyrometer, n. —pyrometric, pyrometrical, adj.
the measurement of radiant energy by means of a radiometer. —radiometric, adj.
the measurement of electric current, usually with a galvanometer. —rheometric, adj.
a means of surveying in which distances are measured by reading intervals on a graduated rod intercepted by two parallel cross hairs in the telescope of a surveying instrument. —stadia, adj.
1. the process of determining the volume and dimensions of a solid.
2. the process of determining the specific gravity of a liquid. —stereometric, adj.
the measurement of distance, height, elevation, etc., with a tachymeter.
the science or use of the telemeter; long-distance measurement.
the measurement of the turbidity of water or other fluids, as with a turbidimeter. —turbidimetric, adj.
measurement of the specific gravity of urine, by means of an urinometer.
volumenometry
the measurement of the volume of a solid body by means of a volumenometer.
volumetry
the measurement of the volume of solids, gases, or liquids; volumetric analysis. —volumetric, volumetrical, adj.
the measurement and comparison of the sizes of animals and their parts. —zoometric, adj.
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