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For length
For area
For liquid volume
For mass ( weight )
For pressure
For temperature
For length:

1 kilometer (km)= 1000 m= 102= 39370" (inch) = 3281' (feet)
1 meter (m) = 10 dm = 100 cm = 39.37" (in.) = 3.28' (ft)
1 decimeter (dm) = 10 cm = 100 mm = 3.94" = 0.33'
1 centimeter (cm)= 10 mm  = 0.39" = 0.03'
1 millimeter (mm)  = 0.04" = 0.003'
     
1 inch (in) 1" = 0.00254 m = 25.4 mm
1 foot (ft.) = 12"1' = 0.3048 m = 304.8 mm
1 yard (yd.) = 3' 1 yd = 0.9144 m = 914.4 mm
1 fathom = 2 yd. = 1.8288 m 
1 pole, rod= 5.5 yd. = 5.0292 m 
1 chain = 4 rods  = 20.1168 m 
1 furlong = 10 chains  = 201.168 m 
1 statute (English) mile = 1760 yd.  = 1609.3 m = 1.609 km
1 nautical mile= 6080 feet  = 1853.2 m = 1.853 km
   (= 1853.12 m in England,
   = 1853.25 m in USA)

Connversion from inch (") into millimeters (mm) 
 
"
mm
"
mm
"
mm
"
mm
1/32
1/16
3/32
1/8
5/32
3/16
7/32
1/4
9/32
5/16
11/32
3/8
13/32
7/16
15/32
1/2
0.79
1.59
2.38
3.17
3.97
4.76
5.56
6.35
7.14
7.94
8.73
9.52
10.32
11.11
11.91
12.70
17/32
9/16
19/32
5/8
21/32
11/16
23/32
3/4
25/32
13/16
27/32
7/8
29/32
15/16
31/32
1
13.49
14.29
15.08
15.87
16.67
17.46
18.26
19.05
19.84
20.64
21.43
22.22
23.02
23.81
24.61
25.40
1 1/8
1 1/4
1 3/8
1 1/2
1 5/8
1 3/4
1 7/8
2
2 1/8
2 1/4
2 3/8
2 1/2
2 5/8
2 3/4
2 7/8
3
28.57
31.75
34.92
38.10
41.27
44.45
47.62
50.80
53.97
57.15
60.32
35.50
66.67
69.85
73.02
76.20
3 1/4
3 1/2
3 3/4
4
4 1/4
4 1/2
4 3/4
5
5 1/2
6
7
8
9
10
11
12" = 1' 
82.55
88.90
95.25
10.60
10.95
11.30
12.65
12.00
139.70
152.40
177.80
203.20
228.60
254.00
279.40
304.80

Conversion from feet ( ' ) into meters (m) 
 


3' = 1 yd. 

0.304 8 
0.609 6 
0.914 4 
1.219 2 
1.524 0 
6' = 2yds. 


9' = 3yds. 
10 
1.828 8 
2.133 6 
2.438 4 
2.743 2 
3.048 0 
12' = 4yds. 
20 
30 
40 
50 
3.658 
6.096 
9.144 
12.192 
15.240 
60 
70 
80 
90 
100 
18.288 
21.336 
24.384 
27.432 
30.480 

Inserting decimal values of inch as: 1/16" = 0.0625; 1/8" = 0.125"; 1/4" = 0.25"; 1/2" = 0.50"; 3/4" = 0.75" etc. you can recon:

Conversion millimeters in inches
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Conversion inches in millimeters
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Conversion centimeters (cm) in feet (')
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Conversion feet (') in centimeters (cm)
Insert feet: centimeters: 
Conversion m (meters) into ' (feet)
Insert m value : 
feet' value (dec.) : 
Conversion from feet ( ' ) into meters (m)
Insert ' (feet) value 
m value (dec.) : 
Conversion meters in yards
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Conversion yards in meters
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Conversion kilometers in miles
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Conversion miles in kilometers
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For area:

Conversion square centimeters in square inches
Insert sq cm: sq inches: 
Conversion square inches in square centimeters
Insert sq inches: sq cm: 
Conversion square meters in square feet
Insert sq meters: sq feet: 
Conversion square feet in square meters
Insert sq feet: sq meters: 
Conversion square meters in square yards
Insert sq meters: sq yards: 
Conversion square yards in square meters
Insert sq yards: sq meters: 
Conversion square kilometers in square miles
Insert sq km: sq miles: 
Conversion square miles in square kilometers
Insert sq miles: sq kilometers: 
Conversion hectares in acres
Insert hectares: acres: 
Conversion acres in hectares
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For liquid volume:

Conversion liters in fluid ounces
Insert liters: fluid ounces: 
Conversion fluid ounces in liters
Insert fluid ounces: liters: 
Conversion liters in pints (Engl.)
Insert liters: pints: 
Conversion pints in liters (Engl.)
Insert pints: liters: 
Conversion liters in pints (Amer.)
Insert liters: pints: 
Conversion pints in liters (Amer.)
Insert pints: liters: 
Conversion liters in quarts (Engl.)
Insert liters: quarts: 
Conversion quarts in liters (Engl.)
Insert quarts: liters: 
Conversion liters in quarts (Amer.)
Insert liters: quarts: 
Conversion quarts in liters (Amer.)
Insert quarts: liters: 
Conversion liters in gallons (Engl.)
Insert liters: gallons: 
Conversion gallons in liters (Engl.)
Insert gallons: liters: 
Conversion liters in gallons (Amer.)
Insert liters: gallons: 
Conversion gallons in liters (Amer.)
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For mass (weight):


1 ton (t) = 1000 kg= 1.1023 short t = 2204.6 lbs= 22.05 cwt (USA)
  = 0.9842 long t = 2204.6 lbs = 19.684 cwt. (Engl.)
1 quintal (q) = 100 kg   
1 kilogram (kg)= 100 dag = 1000 g = 35.2 oz. = 2.2 lbs = 0.02 cwt.
1 decagram (dag)  = 0.01 kg (10-2 kg) = 10 g
1 gram (g) = 0.001 kg (10-3 kg) 
1 decigram (dg)  = 0.0001 kg (10-4 kg) = 0.1 g (10-1 g)
1 centigram (cg)  = 0.00001 kg (10-5 kg) = 0.01 g (10-2 g)
1 milligram (mg)  = 0.000001 kg (10-6 kg) = 0.001 g (10-3 g)
     
1 grain = 0.0648 g  
1 dram = 1.772 g  
1 ounce (oz.)  = 16 drams = 0.02835 kg
1 pound (libra, lb)  = 16 oz.  = 0.45359 kg
1 cental (ctl.)  = 100 lbs.  = 45.359 kg
1 hundredweight (cent weight, cwt.):  
     In USA:1 cwt. = 100 lbs.  = 45.359 kg
     In England: 1 cwt. = 112 lbs.  = 50.802 kg
1 short ton = 2000 lbs. = 907.18 kg
1 (long) ton  = 20 cwt.  = 1016.05 kg
Conversion kilograms in ounces
Insert kilograms: ounces: 
Conversion ounces in kilograms
Insert ounces: kilograms: 
Conversion kilograms in ponds
Insert kilograms: pounds: 
Conversion pounds in kilograms
Insert pounds: kilograms: 
Conversion metric tons in short tons
Insert metric tons: short tons: 
Conversion short tons in metric tons
Insert short tons: metric tons: 
Conversion metric tons in long tons
Insert metric tons: long tons: 
Conversion long tons in metric tons
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For pressure:


Unit in international measuring system:    
1 Newton per square meter:N/m2= 0.102 kp/m2 
Unit in technical measuring system:    
1 kilopond per sq. meter:kp/ m2= 9.81 N/m2 
Other pressure measures:   
Newton per sq. meter:1 N/mm2= 106 N/m2 
bar:1 bar = 105 N/ m2 
milli-bar: 1 mb = 102 N/m2 
micro-bar: 1µbar = 0.1 N/m2 
kilopond at sq. centimeter: 1 kp/cm2= 104 kp/m2 
kilopond at sq. millimeter:1 kp/mm2= 106 kp/m2 
height of water:1mm H2O =1 kp/m2 
height of mercury: 1 mm Hg (Torr) = 13.595 1 kp/m2 
atmosphere (physical): 1 atm = 760 mm Hg = 101.325 N/ m2=14.69 lb/in2
atmosphere (technical): 1 at  = 1 kp/cm2 
     
1 pound per square inch (p. s. i.) = 703.1 kp/m2= 6.895 kN/m2 
1 pound per square foot = 4.882 kp/m2= 47.88 N/m2 
1 pound per square yard = 0.542 5 kp/m2= 5.320 N/m2 
1 (long) ton per square foot = 10 937 kp/m2= 107.3 N/m2 
1 (long) ton per square inch = 157.488 x 104 kp/m2= 15 444 kN/m2 
1 inch of mercury = 345.3 kp/m2= 3.386 kN/m2 
1 inch of water = 25.40 kp/m2= 249.1 N/m2 
1 foot of water = 304.8 kp/m2= 2.989 kN/m2 
 

Comparative table of pressure measures:
 
 

 

 
N/m2
bar
kp/m2= mm H2O
kp/cm2 = at
 
1N/m2=
1N/m/m2=
1bar=
1mbar=
1µbar=
1kp/m2=
1kp/cm2=
1kp/mm2=
1mm H O=
1mm HG=
1atm=
1at=
 
1
 
10
6
10
5
10
2
0.100
 
9.810
 
9.810
* 104
9.810
* 106
9.810
 
133.322
 
101.325
 
9.810
* 102
 
10
-5
10
 
1
 
10
-3
10
-6
0.9810
* 10-4
0.9810
 
0.9810
* 102
0.9810
* 10-4
13.332
* 10-3
10.130
25
0.9810
 
0.102
 
0.102
* 106
0.102
* 105
10.2
 
0.0102
 
1
 
10
4
10
6
1
 
135.951
 
10
332
10
4
0.102
* 10-4
0.102
* 102
0.102
* 10
0.102
* 10-2
0.102
* 10-5
10
-4
1
 
10
2
10
-4
13.600
* 10-4
1.033
2
1
 

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For temperature:


Freezing-point of water: 0oC  =  32oF
Boiling-point of water: 100oC = 212oF

Conversion Fahrenheit's degrees into Celsius' and vice versa:
oC = 5/9 * (oF - 32) = 0.5556 * (oF - 32)
oF = 9/5 *  oC + 32  = 1.8 * oC + 32

Celsius:
Insert Fahrenheit's value : 
Celsius' value : 
Fahrenheit:
Insert Celsius' value : 
Fahrenheit's value : 

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