The arcminute, a unit of angular measurement, is an intriguing relic from astronomy and navigation. One arcminute equals 1/60th of a degree, and there are 60 arcminutes in a degree. To grasp its precision, consider that the human eye can typically perceive an angular resolution of about one arcminute, which is roughly the apparent size of a dime viewed from 75 feet away. This unit is essential in celestial mapping; for instance, the star Sirius has an apparent diameter of about six arcseconds, a subdivision of the arcminute, spotlighting just how detailed our measurement tools need to be.
Interestingly, the arcminute laid the groundwork for innovations like lunar distance in celestial navigation. Sailors in the 18th century used this unit to calculate longitudes, revolutionizing global exploration. Its precision helped navigate the vast oceans, turning the arcminute into a metric of discovery and adventure, not just measurement.
The gradian, also known as a gon, is a fascinating and less commonly used unit of angular measurement. It divides a circle into 400 equal parts, unlike the more familiar degrees or radians. Interestingly, its use is more prevalent in surveying and engineering because it simplifies calculations—each right angle is exactly 100 gradians.
The gradian was introduced during the French Revolution as part of the metric system’s attempt to decimalize units of measurement. Though it didn’t gain widespread adoption, gradian remains a testament to innovative efforts in standardizing measurements. Its legacy continues, offering an intriguing alternative for those looking to simplify complex angular calculations or explore history’s impact on our mathematical tools.
Arcminutes | Gradians |
---|---|
0
arcmin
|
0
grad
|
50
arcmin
|
0.925926
grad
|
100
arcmin
|
1.85185
grad
|
150
arcmin
|
2.77778
grad
|
200
arcmin
|
3.7037
grad
|
250
arcmin
|
4.62963
grad
|
300
arcmin
|
5.55556
grad
|
350
arcmin
|
6.48148
grad
|
400
arcmin
|
7.40741
grad
|
450
arcmin
|
8.33333
grad
|
500
arcmin
|
9.25926
grad
|
550
arcmin
|
10.18519
grad
|
600
arcmin
|
11.11111
grad
|
650
arcmin
|
12.03704
grad
|
700
arcmin
|
12.96296
grad
|
750
arcmin
|
13.88889
grad
|
800
arcmin
|
14.81481
grad
|
850
arcmin
|
15.74074
grad
|
900
arcmin
|
16.66667
grad
|
950
arcmin
|
17.59259
grad
|
1000
arcmin
|
18.51852
grad
|
1050
arcmin
|
19.44444
grad
|
1100
arcmin
|
20.37037
grad
|
1150
arcmin
|
21.2963
grad
|
1200
arcmin
|
22.22222
grad
|
1250
arcmin
|
23.14815
grad
|
1300
arcmin
|
24.07407
grad
|
1350
arcmin
|
25
grad
|
1400
arcmin
|
25.92593
grad
|
1450
arcmin
|
26.85185
grad
|
1500
arcmin
|
27.77778
grad
|
1550
arcmin
|
28.7037
grad
|
1600
arcmin
|
29.62963
grad
|
1650
arcmin
|
30.55556
grad
|
1700
arcmin
|
31.48148
grad
|
1750
arcmin
|
32.40741
grad
|
1800
arcmin
|
33.33333
grad
|
1850
arcmin
|
34.25926
grad
|
1900
arcmin
|
35.18519
grad
|
1950
arcmin
|
36.11111
grad
|
2000
arcmin
|
37.03704
grad
|
2050
arcmin
|
37.96296
grad
|
2100
arcmin
|
38.88889
grad
|
2150
arcmin
|
39.81481
grad
|
2200
arcmin
|
40.74074
grad
|
2250
arcmin
|
41.66667
grad
|
2300
arcmin
|
42.59259
grad
|
2350
arcmin
|
43.51852
grad
|
2400
arcmin
|
44.44444
grad
|
2450
arcmin
|
45.37037
grad
|
2500
arcmin
|
46.2963
grad
|
2550
arcmin
|
47.22222
grad
|
2600
arcmin
|
48.14815
grad
|
2650
arcmin
|
49.07407
grad
|
2700
arcmin
|
50
grad
|
2750
arcmin
|
50.92593
grad
|
2800
arcmin
|
51.85185
grad
|
2850
arcmin
|
52.77778
grad
|
2900
arcmin
|
53.7037
grad
|
2950
arcmin
|
54.62963
grad
|
3000
arcmin
|
55.55556
grad
|
3050
arcmin
|
56.48148
grad
|
3100
arcmin
|
57.40741
grad
|
3150
arcmin
|
58.33333
grad
|
3200
arcmin
|
59.25926
grad
|
3250
arcmin
|
60.18519
grad
|
3300
arcmin
|
61.11111
grad
|
3350
arcmin
|
62.03704
grad
|
3400
arcmin
|
62.96296
grad
|
3450
arcmin
|
63.88889
grad
|
3500
arcmin
|
64.81481
grad
|
3550
arcmin
|
65.74074
grad
|
3600
arcmin
|
66.66667
grad
|
Conversion | Call to Action |
---|---|
Arcminutes to Radians | Go to converter |
Arcminutes to Degrees | Go to converter |
Arcminutes to Arcseconds | Go to converter |