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Units of Measurement

UNITS OF MEASUREMENT


Measurement

Metric

SI

Length

Meter (m)

Meter (m)

Volume

Liter (L)

Cubic Meter (m3)

Mass

Gram (g)

Kilogram (kg)

Time

Second (s)

Second (s)

Temperature

Celsius (0C)

Kelvin (K)

Metric and SI Prefixes

METRIC AND SI PREFIXES


Prefix

Symbol

Meaning

Numerical Value

Scientific
Notation

Prefixes that increase the size of a unit


mega

M

one million

1,000,000

106

kilo

k

one thousand

1,000

103

Prefixes that decrease the size of a unit


deci

d

onetenth

0.1

101

centi

c

onehundredth

0.01

102

milli

m

onethousandth

0.001

103

micro

m

onemillionth

0.000001

106

nano

n

onebillionth

0.000000001

109

Conversion Factors

MEASUREMENT EQUIVALENTS


Length

1 meter (m) = 100 centimeters (cm)
1 meter (m) = 1000 millimeters (mm)
1 meter (m) = 39.4 inches (in.)
1 inch (in.) = 2.54 centimeters (cm)

Volume

1 liter (L) = 1000 milliliters (mL) = 1000 cm3
1 liter (L) = 1.06 quarts (qt)
1 quart (qt) = 946 milliliters (mL)

Mass

1 kilogram (kg) = 1000 grams (g)
1 kilogram (kg) = 2.20 pounds (lb)
1 pound (lb) = 454 grams (g)

Temperature

0F = 1.8 0C + 32
0C = (0F32)/1.8
K = 0C + 273

Gases

1 atm = 760 mm Hg
1 mole (STP) = 22.4 L

H2O

density = 1.00 g/l mL
melt = 80 cal/g
boil = 540 cal/g
SH = 1 cal/g C

Energy

1 Cal = 1 kcal = 1000 cal
1 calorie (cal) = 4.18 joules (J)

METRIC CONVERSION FACTORS


Metric Relationship (Equality)

Conversion Factors

Length


1 m = 1,000 mm

1m and 1000 mm
1000 mm 1m

1 cm = 10 mm

1cm and 10 mm
10 mm 1cm

Volume


1 L = 1,000 mL

1L and 1000 mL
1000 mL 1L

1 dL = 100 mL

1dL and 1000 mL
100 mL 1dL

Mass


1 kg = 1,000 g

1kg and 1000 g
1000 g 1kg

1 g = 1,000 mg

1g and 1000 mg
1000 mg 1g

METRICU.S. RELATIONSHIPS & CONVERSION FACTORS


Relationship

Conversion Factors

Length


2.54 cm = 1 in.

2.54 cm and 1 in.
1 in. 2.54 cm

1 m = 39.4 in.

1m and 39.4 in.
39.4 in. 1m

Volume


946 mL = 1 qt.

946 mL and _1 qt. _
1 qt. 946 mL

1 L = 1.06 qt.

1L and 1.06 qt.
1.06 qt. 1L

Mass


454 g = 1 lb.

454 g and _1 lb.
1 lb. 454 g

1 kg = 2.20 lb.

1 kg and 2.20 lb.
2.20 lb 1 kg
