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.
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.
Gradians | Arcminutes |
---|---|
0
grad
|
0
arcmin
|
5
grad
|
270
arcmin
|
10
grad
|
540
arcmin
|
15
grad
|
810
arcmin
|
20
grad
|
1080
arcmin
|
25
grad
|
1350
arcmin
|
30
grad
|
1620
arcmin
|
35
grad
|
1890
arcmin
|
40
grad
|
2160
arcmin
|
45
grad
|
2430
arcmin
|
50
grad
|
2700
arcmin
|
55
grad
|
2970
arcmin
|
60
grad
|
3240
arcmin
|
65
grad
|
3510
arcmin
|
70
grad
|
3780
arcmin
|
75
grad
|
4050
arcmin
|
80
grad
|
4320
arcmin
|
85
grad
|
4590
arcmin
|
90
grad
|
4860
arcmin
|
95
grad
|
5130
arcmin
|
100
grad
|
5400
arcmin
|
105
grad
|
5670
arcmin
|
110
grad
|
5940
arcmin
|
115
grad
|
6210
arcmin
|
120
grad
|
6480
arcmin
|
125
grad
|
6750
arcmin
|
130
grad
|
7020
arcmin
|
135
grad
|
7290
arcmin
|
140
grad
|
7560
arcmin
|
145
grad
|
7830
arcmin
|
150
grad
|
8100
arcmin
|
155
grad
|
8370
arcmin
|
160
grad
|
8640
arcmin
|
165
grad
|
8910
arcmin
|
170
grad
|
9180
arcmin
|
175
grad
|
9450
arcmin
|
180
grad
|
9720
arcmin
|
185
grad
|
9990
arcmin
|
190
grad
|
10260
arcmin
|
195
grad
|
10530
arcmin
|
200
grad
|
10800
arcmin
|
205
grad
|
11070
arcmin
|
210
grad
|
11340
arcmin
|
215
grad
|
11610
arcmin
|
220
grad
|
11880
arcmin
|
225
grad
|
12150
arcmin
|
230
grad
|
12420
arcmin
|
235
grad
|
12690
arcmin
|
240
grad
|
12960
arcmin
|
245
grad
|
13230
arcmin
|
250
grad
|
13500
arcmin
|
255
grad
|
13770
arcmin
|
260
grad
|
14040
arcmin
|
265
grad
|
14310
arcmin
|
270
grad
|
14580
arcmin
|
275
grad
|
14850
arcmin
|
280
grad
|
15120
arcmin
|
285
grad
|
15390
arcmin
|
290
grad
|
15660
arcmin
|
295
grad
|
15930
arcmin
|
300
grad
|
16200
arcmin
|
305
grad
|
16470
arcmin
|
310
grad
|
16740
arcmin
|
315
grad
|
17010
arcmin
|
320
grad
|
17280
arcmin
|
325
grad
|
17550
arcmin
|
330
grad
|
17820
arcmin
|
335
grad
|
18090
arcmin
|
340
grad
|
18360
arcmin
|
345
grad
|
18630
arcmin
|
350
grad
|
18900
arcmin
|
355
grad
|
19170
arcmin
|
360
grad
|
19440
arcmin
|
365
grad
|
19710
arcmin
|
370
grad
|
19980
arcmin
|
375
grad
|
20250
arcmin
|
380
grad
|
20520
arcmin
|
385
grad
|
20790
arcmin
|
390
grad
|
21060
arcmin
|
395
grad
|
21330
arcmin
|
400
grad
|
21600
arcmin
|
Conversion | Call to Action |
---|---|
Gradians to Radians | Go to converter |
Gradians to Degrees | Go to converter |
Gradians to Arcseconds | Go to converter |