Measurement and Tools
From automated teller machines and atomic clocks to mammograms and semiconductors, innumerable products and services rely in some way on technology, measurement, and standards provided by the National Institute of Standards and Technology.
Founded in 1901, NIST is a nonregulatory federal agency within the U.S. Commerce Department's Technology Administration. NIST's mission is to develop and promote measurement, standards, and technology to enhance productivity, facilitate trade, and improve the quality of life. NIST carries out its mission in four cooperative programs:
Conversion Table
hectares 
x 0.4047 
= 
acres 

ounces 
x 35.3 
= 
kilograms 
sq. kilometres 
/ 247 
= 
acres 

pounds 
x 2.2046 
= 
kilograms 
sq. metres 
x 4047 
= 
acres 

tonnes 
/ 1000

= 
kilograms 
sq. miles 
/ 640

= 
acres 

tons (UK/long) 
/ 1016 
= 
kilograms 
cu.metres 
/ 6.29 
= 
barrels
(oil) 

tons (US/short) 
/ 907 
= 
kilograms 
gallons ( 
x 34.97 
= 
barrels
(oil) 

metres 
x 1000

= 
kilometres 
gallons (US) 
x 42

= 
barrels
(oil) 

miles 
x 0.6214 
= 
kilometres 
litres 
x 159 
= 
barrels
(oil) 

cu.inches 
x 61.02 
= 
litres 
feet 
/ 30.48

= 
centimetres 

gallons ( 
x 0.2200 
= 
litres 
inches 
/ 2.54

= 
centimetres 

gallons (US) 
x 0.2642 
= 
litres 
metres 
/ 100

= 
centimetres 

pints ( 
x 1.760 
= 
litres 
millimetres 
x 10

= 
centimetres 

pints (US liquid) 
x 2.113 
= 
litres 
cubic inches 
x 0.06102 
= 
cubic cm 

yards 
/ 0.9144

= 
metres 
litres 
/ 1000

= 
cubic cm 

centimetres 
x 100

= 
metres 
millilitres 
x 1

= 
cubic cm 

kilometres 
x 1.609 
= 
miles 
cubic inches 
x 1728

= 
cubic
feet 

inches 
/ 25.4

= 
millimetres 
cubic metres 
x 0.0283 
= 
cubic
feet 

grams 
x 28.35 
= 
ounces 
cubic yards 
/ 27

= 
cubic
feet 

litres 
x 0.5683 
= 
pints ( 
gallons ( 
x 6.229 
= 
cubic
feet 

pints (US liquid) 
x 1.201 
= 
pints ( 
gallons (US) 
x 7.481 
= 
cubic
feet 

litres 
x 0.4732 
= 
pints (US
liquid) 
litres 
x 28.32 
= 
cubic
feet 

pints ( 
x 0.8327 
= 
pints (US
liquid) 
cubic cm 
x 16.39 
= 
cubic
inches 

kilograms 
x 0.4536 
= 
pounds 
litres 
x 0.01639 
= 
cubic
inches 

ounces 
x 16

= 
pounds 
cubic feet 
x 35.31 
= 
cubic
metres 

sq. inches 
x 0.1550 
= 
square cm 
centimetres 
x 30.48

= 
feet 

sq. inches 
x 144

= 
square
feet 
metres 
x 0.3048

= 
feet 

sq. metres 
x 0.0929 
= 
square
feet 
yards 
/ 3

= 
feet 

square cm 
x 6.4516

= 
square
inches 
fl.ounces (US) 
x 0.961 
= 
fl.ounces
( 

square feet 
/ 144

= 
square
inches 
millilitres 
x 28.41 
= 
fl.ounces
( 

acres 
x 247 
= 
square km 
fl.ounces ( 
x 1.041 
= 
fl.ounces
(US) 

hectares 
x 100

= 
square km 
millilitres 
x 29.57 
= 
fl.ounces
(US) 

square miles 
x 0.3861 
= 
square km 
pints 
x 8

= 
gallons 

acres 
/ 4047 
= 
square
metres 
cubic feet 
x 0.1605 
= 
gallons ( 

hectares 
/ 10 000

= 
square
metres 
gallons (US) 
x 1.2009 
= 
gallons ( 

square feet 
x 10.76 
= 
square
metres 
litres 
x 4.54609

= 
gallons ( 

square yards 
x 1.196 
= 
square
metres 
cubic feet 
x 0.1337 
= 
gallons
(US) 

acres 
x 640

= 
square
miles 
gallons ( 
x 0.8327 
= 
gallons
(US) 

hectares 
x 259 
= 
square
miles 
litres 
x 3.785 
= 
gallons
(US) 

square km 
x 2.590 
= 
square
miles 
kilograms 
/ 1000

= 
grams 

square metres 
/ 1.196 
= 
square
yards 
ounces 
/ 28.35 
= 
grams 

kilograms 
x 1000

= 
tonnes 
acres 
x 2.471 
= 
hectares 

tons (UK/long) 
x 0.9842 
= 
tonnes 
square km 
/ 100

= 
hectares 

tons (US/short) 
x 1.1023 
= 
tonnes 
square metres 
x 10000

= 
hectares 

kilograms 
x 1016 
= 
tons
(UK/long) 
square miles 
/ 259 
= 
hectares 

tonnes 
x 1.016 
= 
tons
(UK/long) 
square yards 
x 11 960 
= 
hectares 

kilograms 
x 907.2 
= 
tons
(US/short) 
centimetres 
x 2.54

= 
inches 

tonnes 
x 0.9072 
= 
tons
(US/short) 
feet 
/ 12

= 
inches 

metres 
x 0.9144

= 
yards 
Measurement
Method of determining how long, wide, tall, short
or other physical sizes of a object. Below is a listing of different types of
measurements used when dealing with measurements and computers or computer
equipment.
atto
angstrom
cm
centi
centimeter
deci
deka
yotta [Y] 1 000 000 000 000 000 000 000 000 = 10^24 zetta [Z] 1 000 000 000 000 000 000 000 = 10^21 exa [E] 1 000 000 000 000 000 000 = 10^18 peta [P] 1 000 000 000 000 000 = 10^15 tera [T] 1 000 000 000 000 = 10^12 giga [G] 1 000 000 000 (a thousand millions = a billion) mega [M] 1 000 000 (a million) kilo [k] 1 000 (a thousand) hecto [h] 100 (a hundred) deca [da]10 (ten) 1 deci [d] 0.1 (a tenth) centi [c] 0.01 (a hundredth) milli [m] 0.001 (a thousandth) micro [µ] 0.000 001 (a millionth) nano [n] 0.000 000 001 (a thousand millionth) pico [p] 0.000 000 000 001 = 10^12 femto [f] 0.000 000 000 000 001 = 10^15 atto [a] 0.000 000 000 000 000 001 = 10^18 zepto [z] 0.000 000 000 000 000 000 001 = 10^21 yocto [y] 0.000 000 000 000 000 000 000 001 = 10^24