1,000 ″ to mrad — 1,000 arcseconds in milliradians
Exact 1,000 ÷ 206.264806 = 4.848137
16 arcminutes 40 arcseconds
1,000 arcseconds in other units
| Degrees | 0.27777778 | ° |
|---|---|---|
| Radians | 0.004848136811 | rad |
| Milliradians | 4.848137 | mrad |
| Gradians | 0.30864198 | gon |
| Arcminutes | 16.666667 | ′ |
| Turns | 0.000771604938 | turn |
″ to mrad at a glance
| Arcseconds | Milliradians |
|---|---|
| 1 ″ | 0.004848136811 mrad |
| 2 ″ | 0.009696273622 mrad |
| 3 ″ | 0.01454441 mrad |
| 5 ″ | 0.02424068 mrad |
| 10 ″ | 0.04848137 mrad |
| 20 ″ | 0.09696274 mrad |
| 25 ″ | 0.12120342 mrad |
| 50 ″ | 0.24240684 mrad |
| 100 ″ | 0.48481368 mrad |
| 250 ″ | 1.212034 mrad |
| 500 ″ | 2.424068 mrad |
| 1,000 ″ | 4.848137 mrad |
How to convert arcseconds to milliradians
Multiply by 0.004848136811 — one arcsecond is 0.004848136811 milliradians. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 1,000 ÷ 206.264806 = 4.848137
In words: about five milliradians.
What these units are
The arcsecond and the milliradian are covered in the angle unit guide, along with every other unit on this page.
Questions
How many milliradians are in a arcsecond?
One arcsecond is 0.004848136811 milliradians. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 1,000 arcseconds in milliradians?
1,000 arcseconds is 4.848137 milliradians. The working is 1,000 ÷ 206.264806 = 4.848137.
How many degrees is one radian?
About 57.3°, or exactly 180/π. A radian is the angle you get when the arc along a circle is as long as its radius, which is why the number is awkward: it comes from the geometry rather than from someone choosing a round figure.
Why does maths use radians instead of degrees?
Because the calculus only comes out clean in radians. The derivative of sine is cosine only when the angle is in radians; in degrees a factor of π/180 turns up everywhere. Degrees are a human convention, radians are the circle's own unit.
Why 360 degrees in a circle?
Babylonian arithmetic, most likely, and it stuck because 360 divides so willingly — by 2, 3, 4, 5, 6, 8, 9, 10, 12 and more. Halves, thirds and quarters of a circle all land on whole numbers, which is more than can be said for 100.
What is a gradian for?
It is the metric attempt at angle: 100 gradians in a right angle, 400 in a full circle. It never displaced the degree in general use but survives in surveying in parts of Europe, and most scientific calculators still have a GRAD mode next to DEG and RAD.