Arcseconds to Degrees Converter
Convert arcseconds to degrees — 3,600 arcseconds to the degree. Results update as you type; exact factors shown.
One arcsecond is 0.0003 degrees — see the exact factor, not a rounded rule of thumb.
How the arcseconds to degrees converter works
Angles convert through the radian. A full turn is 2π radians = 360° = 400 gon = 6,400 NATO mils. A degree is 60 arcminutes, an arcminute 60 arcseconds.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common angle conversions
| From | To | Units |
|---|---|---|
| 1 ″ | 0.0003 ° | arcsecond to degrees |
| 10 ″ | 0.0028 ° | arcseconds to degrees |
| 60 ″ | 0.0167 ° | arcseconds to degrees |
| 100 ″ | 0.0278 ° | arcseconds to degrees |
| 360 ″ | 0.1 ° | arcseconds to degrees |
| 600 ″ | 0.1667 ° | arcseconds to degrees |
| 1,000 ″ | 0.2778 ° | arcseconds to degrees |
| 1,800 ″ | 0.5 ° | arcseconds to degrees |
| 3,600 ″ | 1 ° | arcseconds to degrees |
| 7,200 ″ | 2 ° | arcseconds to degrees |
| 36,000 ″ | 10 ° | arcseconds to degrees |
| 129,600 ″ | 36 ° | arcseconds to degrees |
Units in this converter and their exact factors
| Unit | Symbol | One unit in radians |
|---|---|---|
| degree | ° | 0.0174532925 radian |
| radian | rad | 1 radian |
| gradian (gon) | gon | 0.0157079633 radian |
| arcminute | ′ | 0.0002908882 radian |
| arcsecond | ″ | 0.0000048481 radian |
| turn (revolution) | rev | 6.2831853072 radian |
| NATO mil (1/6400 turn) | mil | 0.0009817477 radian |
FAQFrequently asked questions about angle conversion
How many arcseconds in a degree?
Exactly 3,600 — sixty arcminutes of sixty arcseconds each.
What is an arcsecond?
A very small angle: about the width of a coin seen from four kilometres away.
Why do astronomers use them?
Because the angles involved are tiny. Stellar parallaxes are fractions of an arcsecond.
What is a parsec?
The distance at which one astronomical unit subtends one arcsecond — about 3.26 light years.
What is 3,600 arcseconds?
One degree.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.