Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Degrees to Arcseconds Converter (° to ″)
arcseconds = degrees × 3,600.
3,600 arcseconds in a degree. Seeing of 1″, GPS, and IAU constants live here. 1/3600° is one arcsecond. Parallax of 1″ at 1 au defines the parsec.
Degrees
° → ″
3,600 ″
1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
- You typed
- 1 °
- One ″ is
- 0 °
- How it’s calculated
- arcseconds = degrees × 3,600.
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Degrees
The “Degrees” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
3,600 arcseconds in a degree. Seeing of 1″, GPS, and IAU constants live here. 1/3600° is one arcsecond. Parallax of 1″ at 1 au defines the parsec. arcseconds = degrees × 3,600. Example: 1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
arcseconds = degrees × 3,600.
Example: 1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
When to use this Degrees to Arcseconds
Common use cases
- 3,600 arcseconds in a degree. Seeing of 1″, GPS, and IAU constants live here. 1/3600° is one arcsecond. Parallax of 1″ at 1 au defines the parsec.
- Sanity-check with this case: 1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
- The relationship is: arcseconds = degrees × 3,600.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Degrees
- arcseconds = degrees × 3,600.
- Example on the page: 1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
How to Convert Degrees to Arcseconds Step-by-Step
- 1Enter Degrees. Use the values you have, not a catalog average, unless that is all you know.
- 2arcseconds = degrees × 3,600.
- 3Worked case: 1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
arcseconds = degrees × 3,600.
1° = 3,600″. 0.001° = 3.6″. 1″ = 1/3600°.
Example: set Degrees = 1, then read the result.
Variable definitions
- value
Degrees
The “Degrees” field. Default 1; typical range 0–1000000000.
- The conversion (arcseconds = degrees × 3,600.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Milliarcseconds are 0.001″. Use SI-style milli on the arcsecond if you need that split.
Related calculators
Unit Converters
- Degrees to ArcminutesSixty arcminutes in a degree. Survey bearings, astronomy declination, and map minutes all use this 60, not SI prefixes. 0.5° is 30′. A full turn is 21,600′.
- Degrees to GradiansA right angle is 100 gon (gradians), 90°, π/2 rad. Surveying in some countries still uses gon. A full circle is 400 gon. Do not mix gon and degrees in a bearing without saying so.
- Fahrenheit to Gas MarkAn American 350 °F cake is UK Gas Mark 4. The mark scale jumps about 25 °F per number. Round to the nearest mark your knobs actually have. Pizza steel at 500 °F is past Mark 9 — just use the number.
- Milliradians to DegreesA milliradian is 0.001 rad ≈ 0.057296°. Optics, ballistics “mils,” and some scopes use mrad. NATO mil is often 1/6400 of a circle (~0.98175 mrad) — not this SI milliradian. Read the reticle manual.
- Radians to Degreesπ rad is 180°. A full turn is 2π rad or 360°. Calculators in radian mode will ruin a trig exam if you type 90 thinking it is a right angle.
- Rankine to FahrenheitRankine is absolute Fahrenheit: 0 °R is absolute zero, and the degrees are the same size as °F. Subtract 459.67. Thermodynamics homework in US customary units lives here. 530 °R is about 70 °F.
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4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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