|
Units
of length |
|
|
1millimetre
|
=
0.03937 inch
|
|
10
mm
|
=
1 centimetre
|
=
0.3937 inch
|
|
10
cm
|
=1
decimetre
|
=3.937inches
|
|
10
dm |
=
1 metre
|
=39.37inches
|
|
10
m |
= 1
decametre
|
=10.94 yards
|
|
10
dam |
= 1
hectometre
|
=
109.4 yards
|
|
10
hm |
=1 kilometre
|
=
0.6214mile
|
|
|
|
Units of capacity |
|
|
1
millitre
|
=
0.00176 pint
|
|
10 ml
|
= 1
centilitre
|
=
0.0176 pint
|
|
10 cl
|
= 1
decilitre
|
=
0.176 pint
|
|
1 dl
|
= 1
litre
|
= 1.76
pints = 0.22 uk gallon
|
|
10 l |
= 1
decalitre
|
= 2.20
gallons
|
|
10 dal |
= 1
hectolitre
|
= 22.0
gallons
|
|
10 hl |
= 1
kilolitre
|
=
220.0 gallons
|
|
|
|
Square measure |
| |
1
square
millimetre |
=
0.00155 square inch |
|
100
mm2 |
= 1
square centimetre |
=
0.1550 square inch |
|
100
cm2 |
= 1
square metre= 1
square metre |
=
1.196 square yards |
|
100
m2 |
= 1
are |
=
119.6 square yards |
|
100
ares |
=
1 hectare |
=
2.471 acres |
|
100
ha |
= 1
square kilometre |
=
247.1 acres
|
|
|
Circular measura |
|
1
micrordian
|
=
0.206 seconds
|
|
|
1000
µ rad
|
= 1
milli-
|
|
|
|
radian
|
=
3.437 minutes
|
|
1000
mrad
|
= 1
radian
|
=
57.296
|
|
|
degrees |
=
180 / π
degrees
|
|
|
|
Square measura |
|
|
1
Square inch |
=
645.16 mm2 |
|
144
Square inches |
= 1
Square foot |
=
0.0929 m2 |
|
9
Square feet |
= 1
Square yard |
=
0.8361m2 |
|
4840
Square yards |
= 1
acre |
=
4047 m2 |
|
640
acres |
= 1
Square mile |
=
259 ha |
|
|
|
Cubic
measure |
|
|
1
cubic inch
|
=
16.39 cm3
|
|
1728
cubic inches
|
= 1
cubic foot
|
=
0.02832 m3
|
|
|
|
=
28.32 dm3
|
|
27
cubic feet
|
= 1
cubic yard
|
=
0.7646 m3
|
|
|
|
=
764.6 dm3 |
|
|
|
Circular measure |
|
|
1
second
|
=
4.860 µrad |
|
60
seconds |
= 1
minute |
=
0.2909 µrad |
|
60
minutes |
= 1
degree |
=
17.45 µrad |
|
|
|
/180 π= |
|
45
degree |
=1oxtant |
=
π / 4
rad |
|
60
degree |
= 1
sextant |
=
π / 3
rad |
|
90
degree |
= 1
quadrant or |
|
|
|
1
right angle |
=
π / 2
rad |
|
360
degree |
= 1
circle or |
|
|
|
1
circumference |
= 2
π
rad |
|
1
grade or |
=
1/100th of
a |
|
|
gon |
right angle |
=
π/200
rad |
|
|
|
Units of weight
|
|
|
1
grain |
=
64.8 mg |
|
|
1
dram |
=
1.772 g |
|
16
drams |
=1 ounce
|
=28.35 g |
|
16
ounces
|
=1 pound
|
=0.4536 kg |
|
14
pounds |
=1
stone |
=
6.350 kg |
|
2
stones |
=1
quarter |
=
12.70 kg |
|
4
quarters |
=1
(long) |
|
|
|
hundredweight |
=
50.80 kg |
|
20
hundredweight |
=1
(long) ton |
=
1.016 tonnes |
|
100
pounds |
=1
(short) |
|
|
|
hundredweight |
=
45.36 kg |
|
2000
pounds |
= 1
(short) ton |
=
0.9072 |
|
|
|
tonnes
|
|
|
|
Units
of length |
|
|
1 inch
|
=
2.54 cm
|
|
12
inches
|
=
1 foot
|
=
0.3048m
|
|
3
feet
|
=
1 yard
|
=
0.9144 m
|
|
5½
yard
|
= 1
rod, pole,or
|
|
|
|
Perch
|
=
5.029 m
|
|
22
yards |
= 1
chain
|
=
20.12m
|
|
10
chains |
= 1
furlong
|
=
0.2012 km
|
|
8
furlongs
|
=
1 mile
|
=
1.609 km
|
|
6076.12 feet |
= 1
nautical mile
|
=
1852m
|
|
|
Units of
capacity |
|
|
1 fluid
ounce |
=
28.41 cm3
|
|
5
fluid ounces |
=
1gill |
=
0.1421dm3
|
|
4
gills |
=
1 pint |
=
0.5683 dm3
|
|
2
pints |
=
1 quart
|
=
1.137 dm3
|
|
4
quarts |
= 1
(uk) gallon |
=
4.546 dm3 |
|
231
cubic inches |
= 1
(us) gallon |
=
3.785 dm3 |
|
8
gallons |
= 1
bushel |
=
36.369 dm3 |
|
|
|
|
Units of weight |
|
1
milligram |
= 0.015
grain
|
10
mg |
= 1
centigram
|
= 0.154
grain
|
10
cg |
= 1
decigram
|
= 1.543
grain
|
10
dg |
= 1
gram |
= 15.43 grains
= 0.035 ounces
|
10
g |
= 1
decagram
|
= 0.353
ounce
|
10
dag
|
= 1
hectogram
|
= 3.527
ounces
|
10
hg |
= 1
kilogram |
= 2.205
pound
|
1000
kg |
= 1
tonne |
= 0.984 (long)
ton
|
|
(metric
ton)
|
= 2204.62
pounds
|
|
|
|
Metric
prefixes |
|
|
Abbreviation |
Factor |
|
tera- |
T |
10
12 |
|
giga-
|
G |
109
|
|
mega- |
M |
106
|
|
kilo- |
K |
103
|
|
hecto-
|
h |
102
|
|
deca-
|
da |
101
|
|
deci- |
d |
10-1
|
|
centi-
|
c |
10-2
|
|
milli- |
m |
10-3
|
|
micro- |
µ |
10-6
|
|
nano- |
n |
10-9
|
|
pico- |
p |
10-12
|
|
femto- |
f |
10-15
|
|
atto- |
a |
10-18
|
|
|
|
US
liquid measure |
|
1
fluid ounce |
=
1.0408 uk fluid ounces |
|
|
=
0.0296 dm3 |
|
16
fluid ounces |
= 1
pint = 0.8327 uk pint |
|
|
=
0.4732 dm3 |
|
8
pints |
= 1
gallon = 0.8327 uk gallon |
|
|
=
3.7853 dm3 |
|
|
|
US dry
measur |
|
1
pint |
=
0.9689 uk pint
|
=
0.5506 dm3 |
|
1
bushel |
=
0.9689 uk bushel |
=
35.238 dm3 |
|
|
|
Cubic measure |
|
|
1
cubic centimetre
|
=
0.06102 cubic inch
|
|
1000
cm3
|
= 1
cubic decimetre
|
=
0.03532 cubic foot
|
|
1000
dm3
|
= 1
cubic metre
|
=
1.308 cubic yards
|
|
|
|
