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.
An arcsecond is a fascinating unit of angular measurement used extensively in astronomy and geodesy. To grasp its minuteness, consider that an arcsecond is 1/3600th of a degree, and there are 360 degrees in a full circle. For practical perspective, the apparent size of a U.S. dime viewed from about 4 kilometers (or 2.5 miles) away roughly equals an arcsecond.
In the realm of astronomy, arcseconds are crucial for measuring celestial events and distances. The Hubble Space Telescope’s resolution power is often celebrated for its ability to distinguish details as tiny as about 0.05 arcseconds—akin to seeing a bumblebee 800 kilometers away! This unit’s precision is vital for understanding the cosmos, from determining stellar positions to mapping distant galaxies.
Gradians | Arcseconds |
---|---|
0
grad
|
0
arcsec
|
5
grad
|
16200
arcsec
|
10
grad
|
32400
arcsec
|
15
grad
|
48600
arcsec
|
20
grad
|
64800
arcsec
|
25
grad
|
81000
arcsec
|
30
grad
|
97200
arcsec
|
35
grad
|
113400
arcsec
|
40
grad
|
129600
arcsec
|
45
grad
|
145800
arcsec
|
50
grad
|
162000
arcsec
|
55
grad
|
178200
arcsec
|
60
grad
|
194400
arcsec
|
65
grad
|
210600
arcsec
|
70
grad
|
226800
arcsec
|
75
grad
|
243000
arcsec
|
80
grad
|
259200
arcsec
|
85
grad
|
275400
arcsec
|
90
grad
|
291600
arcsec
|
95
grad
|
307800
arcsec
|
100
grad
|
324000
arcsec
|
105
grad
|
340200
arcsec
|
110
grad
|
356400
arcsec
|
115
grad
|
372600
arcsec
|
120
grad
|
388800
arcsec
|
125
grad
|
405000
arcsec
|
130
grad
|
421200
arcsec
|
135
grad
|
437400
arcsec
|
140
grad
|
453600
arcsec
|
145
grad
|
469800
arcsec
|
150
grad
|
486000
arcsec
|
155
grad
|
502200
arcsec
|
160
grad
|
518400
arcsec
|
165
grad
|
534600
arcsec
|
170
grad
|
550800
arcsec
|
175
grad
|
567000
arcsec
|
180
grad
|
583200
arcsec
|
185
grad
|
599400
arcsec
|
190
grad
|
615600
arcsec
|
195
grad
|
631800
arcsec
|
200
grad
|
648000
arcsec
|
205
grad
|
664200
arcsec
|
210
grad
|
680400
arcsec
|
215
grad
|
696600
arcsec
|
220
grad
|
712800
arcsec
|
225
grad
|
729000
arcsec
|
230
grad
|
745200
arcsec
|
235
grad
|
761400
arcsec
|
240
grad
|
777600
arcsec
|
245
grad
|
793800
arcsec
|
250
grad
|
810000
arcsec
|
255
grad
|
826200
arcsec
|
260
grad
|
842400
arcsec
|
265
grad
|
858600
arcsec
|
270
grad
|
874800
arcsec
|
275
grad
|
891000
arcsec
|
280
grad
|
907200
arcsec
|
285
grad
|
923400
arcsec
|
290
grad
|
939600
arcsec
|
295
grad
|
955800
arcsec
|
300
grad
|
972000
arcsec
|
305
grad
|
988200
arcsec
|
310
grad
|
1004400
arcsec
|
315
grad
|
1020600
arcsec
|
320
grad
|
1036800
arcsec
|
325
grad
|
1053000
arcsec
|
330
grad
|
1069200
arcsec
|
335
grad
|
1085400
arcsec
|
340
grad
|
1101600
arcsec
|
345
grad
|
1117800
arcsec
|
350
grad
|
1134000
arcsec
|
355
grad
|
1150200
arcsec
|
360
grad
|
1166400
arcsec
|
365
grad
|
1182600
arcsec
|
370
grad
|
1198800
arcsec
|
375
grad
|
1215000
arcsec
|
380
grad
|
1231200
arcsec
|
385
grad
|
1247400
arcsec
|
390
grad
|
1263600
arcsec
|
395
grad
|
1279800
arcsec
|
400
grad
|
1296000
arcsec
|
Conversion | Call to Action |
---|---|
Gradians to Radians | Go to converter |
Gradians to Degrees | Go to converter |
Gradians to Arcminutes | Go to converter |