Units of Measurement and their Conversion

 

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Surface Measurements
Symbols of Units
Unit =
sq.cm
sq.m
sq.in.
sq.ft.
sq.yd.
1 sq.cm
1
-
0,155
-
-
1 sq.m
10 000
1
1 550
10,76
1,196
1 sq.in.
6,452
-
1
-
-
1 sq.ft.
929
0,0929
144
1
0,1111
1 sq.yd.
8 361
0,8361
1 296
9
1
Length
Surface
m
Metre
sq.m
Squaremetre
km
Kilometre
sq.cm
Sq.centimetre
cm
Centimetre
sq.in.
Square inch
in
inch
sq.ft.
Square foot
ft
foot
sq.yd.
Square yard
yd
yard
 
Solid Measures
Unit =
cu.cm
cu.m
cu.in.
cu.ft.
cu.yd
1 cu.cm
1
-
0,06102
-
-
1 cu.m
-
1
61 023
35,31
1,31
1 cu.in.
16,39
-
1
-
-
1 cu.ft.
28 316
0,02832
1 728
1
0,037
1 cu.yd.
-
0,7646
46 656
27
1
Tem
perature
Solid
°C
Degree Celsius
cu.m
Cubic metre
°F
Degree Fahrenheit
cu.cm
Cu. centimetre
cu.in.
Cubic inch
cu.ft.
Cubic foot
cu.yd.
Cubic yard
Energy Measures
Unit =
kcal
kJ
kWh
btu.
1 kcal
1
4,1868
1,1628x 10¯³
3,968
1 kJ
0,2388
1
2,777x 10¯ 4
0,9477
1 kWh
860
3,6
1
3 412
1 btu
0,2520
1,0551
2,930 x 10¯4
1
 
Power
/Weight
Energy
N
Newton
kcal
Kilocalorie
kp
Kilopond
J
Joule
lb.
Pound (libre)
kWh
Kilowatt-Hour
btu
British Thermal
Unit
 
Wattage
Ion
Dosage
kJ/h
Kilojoule per hour
R
Roentgen
kcal/h
Kilocalorie per hour
C
Coulomb
kW
Kilowatt
btu/h
British thermal
units per hour
A
Ampere
Wattage Measures
Unit =
kcal/h
kJ/h
kW
btu/
1 kcal/h
1
4,1868
1,1628x 10¯³
3,968
1 kJ/h
0,2388
1
2,777x 10¯ 4
0,9477
1 kW
860
3,6
1
3 412
1 btu/h
0,2520
1,0551
2,930 x 10¯4
1
Ion Dosage Energy
1 mr/h = 71,7 pA/kg = 0,258 µC/kg

Temperature Measures
°C = 0,555 x (F° - 32)
°F = 1,8 x °C + 32
 

 

Power Measures
 
Unit =
kp
N
lb.
1 kp
1
9,80665
2,205
1 N
0,1019
1
0,2248
1 lb.
0,4535
4,447
1
 

 

Linear Measures
Unit =
cm
m
km
in.
ft.
yd.
stat.mile
1 cm
1
0,01
10¯5
0,3937
0,03281
0,01094
-
1 m
100
1
0,001
39,37
3,281
1,094
-
1 km
100 000
1 000
1
39 20
3 281
1 094
0,6214
1 in.
2,54
0,0254
2,54 x 10¯5
1
0,08333
0,02778
-
1 ft.
30,48
0,3048
3,048 x 10¯4
12
1
0,3333
-
1 yd.
91,44
0,9144
9,144 x 10¯4
36
3
1
-
1 stat. mile
-
1 609,3
1,609
63 360
5 280
1 760
1
 
Pressure Measures
Unit =
N / sq.m
N / sq.cm
kp / sq.m
kp / sq.cm
lb. / sq.ft.
lb. / sq.in.
1 N / sq.m
1
10¯4
0,1019
0,1019 x 10¯4
2,088 x 10¯2
1,45 x 10¯4
1 N / sq.cm
10 000
1
1,019 x 10³
0,1019
208,8
1,45
1 kp / sq.m
9,80665
9,8066 x 10¯4
1
10¯4
0,2048
1,422 x 10¯³
1 kp / sq.cm
9,8066x 10 000
9,80665
10 000
1
2 048
14,22
1 lb. / sq.ft.
47,87
4,787 x 10¯³
4,882
4,882 x 10¯4
1
6,943 x 10¯³
1 lb. / sq.in.
6 896
0,6896
703
7,032 x 10¯²
144
1
 
Linear Measures
1 inch (in.) = 2,54 cm
1 foot (ft) = 12 inches = 30,48 cm
1 yard (yd) = 3 feet = 91,44 cm
 
 
 
Surface Measures
1 square inch (sq.in.) = 6,45 sq.cm
1 square foot (sq.ft.) = 144 square inches = 929,03 sq.cm
1 square yard (sq.yd) = 9 square feet = 0,836 sq.m
1 square rod (sq.rd) = 30,25 square yards = 25,29 sq.m
1 rood (ro.) = 40 square rods = 10,12 a
1 acre (a.) = 4 roods = 40,47 a
1 square mile (sq.ml./sq.mi) = 640 acres = 2,59 sq.km
 
Solid Measures
1 cubic inch (cu.in.) = 16,387 cu.cm
1 cubic foot (cu.ft) = 1 728 cubic inches = 0,028 cu.m
1 cubic yard (cu.yd) = 27 cubic feet = 0,765 cu.m
1 register ton (reg.ton) = 100 cubic feet = 2,832 cu.m
 
Measuring Measures
1 link (li./l.) = 7,92 inches = 20,12 cm
1 rod (rd.), pole or perch (p.) = 25 links = 5,03 m
1 chain (ch.) = 4 rods = 20,12 m
1 furiong (fur.) = 10 chains = 201,17 m
1 (statute) mile (ml/mi) = 8 furlongs = 1 609,34 m

 

British Dry and Liquid Measures (Measures of Capacity)
1 imperial gill (gi./gl) = 0,142 ltr.
1 imperial pint (pt) = 4 gills = 0,568 ltr.
1 imperial quart (qt) = 2 imperial pints = 1,136 ltr.
1 imperial gallon (imp.gal.) = 4 imperial quarts = 4,546 l
British Dry Measures
1 imperial peck (ok) = 2 imperial gallons = 9,092 ltr
1 imperial bushel (bu./bsh.) = 4 imperial pecks = 36,36 ltr.
1 imperial quarter (qr) = 8 imperial bushels = 290,94 ltr.
 
 
British Liquid Measure
1 imperial barrel (bbl./bl.) = 36 imperial gallons = 1,636 hl

 

American Dry Measures (Measures of Capacity)
1 U.S. dry pint = 0,551 ltr
1 U.S. dry quart = 2 dry pints = 1,1 ltr.
1 U.S. peck = 8 dry quarts = 8,8 ltr.
1 U.S. bushel (grain measure) = 4 pecks =35,24 ltr.
 
 
American Liquid Measures
1 U.S. liquid gill = 0,118 ltr.
1 U.S. liquid pint = 4 gills = 0,473 ltr.
1 U.S. liquid quart = 2 liquid pints = 0,946 ltr.
1 U.S. gallon = 4 liquid quarts = 3,785 ltr.
1 U.S. barrel = 31,5 gallons = 119,2 ltr.
1 U.S. barrel petroleum = 42 gallons = 158,97 ltr.

 

Commercial Weights
1 grain (gr.) = 0,0648 g
1 dram (dr.av.) = 27,34 grains = 1,77 g
1 ounce (oz av.) = 16 drams = 28,35 g
1 pound (lb.av.) = 16 ounces = 0,453 kg
1 stone (st.) = 14 pounds = 6,35 kg
 
 
Commercial Weights
1 Br. quarter (qr) = 28 pounds = 12,7 kg
1 Am. quarter (qr) = 25 pounds = 11,34 kg
1 Br. hundredweight (cwt/cwt.l)) = 112 pounds = 50,8 kg
1 Am. hundredweight (cwt/cwt.sh.) =100 pound =45,36 kg
1 Br. ton (t/tn/tn.l.)=2 240 pounds (=20 cwt.l) = 1 016 kg
1 Am. ton (tn.sh)= 2 000 pounds (=20 cwt.sh.) = 907,18 kg

SI - System
Base Units
Length
Metre
m
Mass
Kilogramms
kg
Time
Seconds
s
electr. Power
Ampere
A
Temperature
Kelvin
K
Luminous Intensity
Candela
cd
Derivation
Power
Newton
(N) = m x kg : s²
Pressure
Pascal
(PA) = N : s²
Energy
Joule
(J) = N x m
Wattage
Watt
(W) = N x m : s = J : s
Mass related to Length
Tex
(tex) = g : 1000m
  Conclusion
1 kp = 9,81 kg x (m : s²) = 9,81 N
1 N = (1: 9,81) kp = 0,102 kp = 102 p
Tearing Power related to fineness: Rkm = (p:tex) ~ (cN : tex)

 

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