arcseconds to arcminutes | Exact Decimal + Formula
1 Arcsecond = 0.016667 Arcminute
One arcminute equals exactly 60 arcseconds — a fixed ratio you can memorize. Real-world use: astronomical measurements of star positions and telescope resolution. This page expresses those values in arcminutes, which is used for astronomy (apparent sizes), optics, and navigation. Type a value above for an instant answer; the exact formula and the reference table are below.
About Arcsecond and Arcminute
Arcsecond (arcsec)
An arcsecond is 1/3,600 of a degree.
Where it's used: Astronomical measurements of star positions and telescope resolution.
Arcminute (arcmin)
An arcminute is 1/60 of a degree.
Where it's used: Astronomy (apparent sizes), optics, and navigation.
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Formula
arcmin = arcsec × 0.016666667
To convert Arcsecond to Arcminute, use the formula displayed above.
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Arcsecond to Arcminute: Quick Reference Table
| Arcsecond | Arcminute (Decimal) | Fraction |
|---|---|---|
| 0.001 arcsec | 0.000017 arcmin | - |
| 0.01 arcsec | 0.000167 arcmin | - |
| 0.1 arcsec | 0.001667 arcmin | - |
| 0.5 arcsec | 0.008333 arcmin | - |
| 1 arcsec | 0.016667 arcmin | - |
| 2 arcsec | 0.033333 arcmin | - |
| 5 arcsec | 0.083333 arcmin | - |
| 10 arcsec | 0.166667 arcmin | - |
| 25 arcsec | 0.416667 arcmin | - |
| 50 arcsec | 0.833333 arcmin | - |
| 100 arcsec | 1.666667 arcmin | - |
| 250 arcsec | 4.166667 arcmin | - |
| 500 arcsec | 8.333333 arcmin | - |
| 1000 arcsec | 16.666667 arcmin | - |
arcsec to arcmin Formula and Examples
Direct Formula
arcmin = arcsec × 0.016666667 Inverse Formula
arcsec = arcmin × 60 Mental Math Shortcut
Divide the value by roughly 60 to quickly estimate the converted result.
Common Arcsecond to Arcminute Calculations
- 5 arcsec = 0.083333 arcmin
- 10 arcsec = 0.166667 arcmin
- 50 arcsec = 0.833333 arcmin
- 100 arcsec = 1.666667 arcmin
- 500 arcsec = 8.333333 arcmin
Precision & Practical Use
For example, 10 arcsec = 0.166667 arcmin — roughly fractional unit measurement.
Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most angle applications, 2–3 significant figures are plenty.
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How to Convert Arcsecond to Arcminute
How many arcminutes are in one arcsecond?
One Arcsecond (arcsec) equals 0.016667 Arcminute (arcmin). To convert arcseconds to arcminutes, multiply the arcsecond value by 0.016667.
How do I convert Arcsecond to Arcminute?
Multiply your arcsecond value by 0.016667 to get the result in Arcminute: arcmin = arcsec × 0.016667. For example, 5 arcsec = 0.083333 arcmin.
What is the formula for converting arcsec to arcmin?
The conversion formula is arcmin = arcsec × 0.016667. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for arcsec to arcmin?
Divide the value by roughly 60 to quickly estimate the converted result.
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