unit of measure
conversions equivalences

italiano misure english measure
Conversion table
Conversion factors in PDF

equivalences unit of angle

degree minute second mill. exact mill. conventional degree cent.
1  60  3600  17.45329  17.77777  1.11111 
0.01667  1  60  0.29089  0.29630  0.01852 
0.00028  0.01667  1  0.00485  0.00494  0.00031 
0.05730  3.43775  206.26482  1  1.01859  0.06366 
0.05625  3.37500  202.50000  0.98175  1  0.06250 
0.90000  54  3240  15.70796  16  1 


1 degree = 0.017453293 radiant
1 minute = 0.000290888 radiant
1 second = 0.000004848 radiant

value of p

p represent the relationship between the circumference and the diameter of a same circle. 
p = 3.1415926535897932384626434
1/p = 0.3183098861837906715377675
p2 = 9.8696044011
p3 = 31.0062766803
radice2 p = 1.77245385509
radice3 p = 1.4645918876

The constant relationship between the area of a circle and the square of its beam, was already to acquaintance of Babylonian and Egyptian, but the value of such constant was uncertain. The Greek Archimedes (287-212 a.C.) it was the first one to expose a procedure in order to calculate the value of p, establishing that the area of the registered regular polygons in the circle of unitary area he stretches to the area of the same circle as they increase the sides of the polygon. The Swiss Eulero (1707-83) demonstrated that:
1 - 1/3 + 1/5 - 1/7 +.... = p/ 4.
Later on English J. Wallis (1616-1703) enunciated the equality:
2/1 2/3 4/3 4/5 6/5 6/7... = p/ 2.

radiant (r) degree cent. (gr) degree sexagesimal ( = ' ")
1  63.6619772  57.2957795 = 571744.81 
0.0157080  1  0.9 = 0.54 
0.0174533  1.1111111  1 

definitions report to 1 radiant

angle turn = 2 p   line (artillery) (-) = p/3200
dez = 0.174533   thousandth = 10-3
gon (g) = 0.015708   conventional thousandth () = p/3200
degree () = 0.17453   angle minute (') = 2.908882*10-4
marine line = p/16   angle second(") = 4.848137*10-6

definitions report to 1 steradian

gon square  = (p/200)2
grado square  = (p/180)2
sphere  = 4p

angular resolution

bits counts arcmins mirads
7  128  168.75  49.087 
8  256  84.375  24.544 
9  512  42.188  12.272 
10  1024  21.094  6.1359 
11  2048  10.547  3.0680 
12  4096  5.2734  1.5340 
13  8192  2.6367  0.76699 
14  16384  1.3184  0.38350 
15  32768  0.65918  0.19175 
16  65536  0.32959  0.095874 
17  131072  0.16479  0.047937 
18  262144  0.082397  0.023968 
19  524288  0.041199  0.011984 
20  1048576  0.020599  0.0059921 


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