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Conversions: English & Metric Measurement

Measurement is the estimation of the magnitude of some attribute of an object, such as its length or weight, relative to a unit of measurement. Measurement usually involves using a measuring instrument, such as a ruler or scale, which is calibrated to compare the object to some standard, such as a meter or a kilogram. In science, however, where accurate measurement is crucial, a measurement is understood to have three parts: first, the measurement itself, second, the margin of error, and third, the confidence level — that is, the probability that the actual property of the physical object is within the margin of error. For example, we might measure the length of an object as 2.34 meters plus or minus 0.01 meter, with a 95% level of confidence.

Metrology is the scientific study of measurement. In measurement theory a measurement is an observation that reduces an uncertainty expressed as a quantity. As a verb, measurement is making such observations. It includes the estimation of a physical quantity such as distance, energy, temperature, or time. It could also include such things as assessment of attitudes, values and perception in surveys or the testing of aptitudes of individuals.

In the physical sciences, measurement is most commonly thought of as the ratio of some physical quantity to a standard quantity of the same type, thus a measurement of length is the ratio of a physical length to some standard length, such as a standard meter. Measurements are usually given in terms of a real number times a unit of measurement, for example 2.53 meters, but sometimes measurements use complex numbers, as in measurements of electrical impedance.

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Conversions: English & Metric Measurement
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29 Items found Print
58-Piece Metric Weight Set
from Learning Resources
for Kindergarten-5th grade
in Scales & Balances (Location: B08-TOP)
Beginner's Balance
by Learning Resources
from Learning Resources
for Preschool-3rd grade
in Scales & Balances (Location: B08-TOP)
$15.00
Brass Mass Set
from Learning Resources
for 3rd-6th grade
in Scales & Balances (Location: B08-TOP)
$14.95
Bucket Balance
from Ideal School Supply Company
for Kindergarten-6th grade
in Scales & Balances (Location: B08-TOP)
$8.00 (1 in stock)
Customary Weight Set
from Learning Resources
for 3rd-6th grade
in Scales & Balances (Location: B08-TOP)
$26.99
DK Eyewitness: Money
DK Eyewitness Series
from Alfred A. Knopf, Inc.
for 4th-8th grade
in Money (Coins & Currency) (Location: B08-03C)
$6.00 (1 in stock)
English/Metric Tape Measure
from Learning Resources
for Kindergarten-6th grade
$2.00
English/Metric Tape Measure (Set of 10)
from Learning Resources
for Kindergarten-6th grade
$9.99
How Big is a Foot?
by Rolf Myller
from Yearling
for Kindergarten-1st grade
in Picture Books (Location: CPB-03)
$3.50 (1 in stock)
Key to Measurement - Set
by Betsy Franco
from Key Curriculum Press
for 4th-7th grade
$14.00 (1 in stock)
Key to Measurement 1-4 - Answers and Notes
by Betsy Franco
from Key Curriculum Press
for 4th-8th grade
$5.95
Key to Metric Measurement 1-4 - Answers and Notes
by Betsy Franco
from Key Curriculum Press
for 4th-8th grade
$3.50 (1 in stock)
Key to Metric Measurement 2
by Betsy Franco
from Key Curriculum Press
for 4th-8th grade
$2.50 (2 in stock)
Key to Metric Measurement 3
by Betsy Franco
from Key Curriculum Press
for 4th-8th grade
$2.50 (1 in stock)
Key to Metric Measurement 4
by Betsy Franco
from Key Curriculum Press
for 4th-8th grade
$2.50 (1 in stock)
Math 2 Flipper
from Christopher Lee Publications
for 6th-12th grade
in Math Flippers (Location: B08-top)
$9.95
Math Terminology Flipper
from Christopher Lee Publications
for 4th-10th grade
in Flippers (Location: BLG-FLP)
$9.95
My Book of Measurement: Length
from Kumon Publishing
for 1st-3rd grade
in Kumon Math Skills (Location: B08-07E)
$7.95
My Book of Measurement: Volume
Act Csm Wk from Kumon Publishing
for 1st-3rd grade
in Kumon Math Skills (Location: B08-07E)
$7.95
My Book of Measurement: Weight
Act Csm Wk from Kumon Publishing
for 1st-3rd grade
in Kumon Math Skills (Location: B08-07E)
$7.95
My First Book of Time
by Claire Llewellyn
from DK Publishing
for Preschool-2nd grade
in Time & Clocks (Location: B08-03B)
$7.50 (1 in stock)
Platform Scale
from Learning Resources
for 1st-3rd grade
in Scales & Balances (Location: B08-TOP)
Primary Bucket Balance
by Learning Resources
from Learning Resources
for Kindergarten-6th grade
in Scales & Balances (Location: B08-TOP)
$19.99
Ray's New Arithmetics - Key to Primary, Intellectual and Practical
by Joseph Ray, M.D.
from Mott Media
for 1st-6th grade
in Ray's New Arithmetic (Location: B08-06A)
$12.99 $6.50 (1 in stock)
Ray's New Higher Arithmetic
by Joseph Ray, M.D.
from Mott Media
for 7th-10th grade
in Ray's New Arithmetic (Location: B08-06A)
$10.50 (2 in stock)
Ray's New Higher Arithmetic - Key
by Joseph Ray, M.D.
from Mott Media
for 7th-10th grade
in Ray's New Arithmetic (Location: B08-06A)
$6.50 (2 in stock)
Ray's New Practical Arithmetic
by Joseph Ray, M.D.
from Mott Media
for 5th-6th grade
in Ray's New Arithmetic (Location: B08-06A)
$8.50 (1 in stock)
Student Thermometer
by Learning Resources
from Learning Resources
for 2nd-7th grade
$1.50
Ton
by Taro Miura
from Chronicle Books
for 1st-3rd grade
in Math Picture Books (Location: B08-07B)
$7.50 (1 in stock)