Arcseconds to Arcminutes
Convert arcseconds to arcminutes instantly — one arcsecond is 0.0166667 arcminutes.
| Arcseconds | Arcminutes |
|---|---|
| 1 ″ | 0.016667 ′ |
| 2 ″ | 0.033333 ′ |
| 3 ″ | 0.05 ′ |
| 5 ″ | 0.083333 ′ |
| 10 ″ | 0.166667 ′ |
| 25 ″ | 0.416667 ′ |
| 50 ″ | 0.833333 ′ |
| 100 ″ | 1.666667 ′ |
How to use
- Enter a value in the Arcseconds field.
- The Arcminutes figure appears immediately — no button to press.
- Typing in the Arcminutes field converts back to Arcseconds the same way.
- Use the reference table for the values that come up most often.
Arcseconds to Arcminutes formula
Converting arcseconds to arcminutes is a single multiplication by 0.0166666667.
′ = ″ × 0.0166666667
Put another way, one arcsecond is exactly 1/60 of an arcminute.
Why this factor: the arcsecond and the arcminute are both defined against the degree, so dividing one definition by the other gives 0.0166666667 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0166666667 — or use the Arcminutes to Arcseconds converter, which is the same calculation reversed.
Worked example
Start with 90 ″. Multiply by 0.0166666667 to get 1.5 ′.
90 ″ × 0.0166666667 = 1.5 ′
The converter above does this for any value you type, in either direction.
What is an arcsecond?
An arcsecond is one 3,600th of a degree — the precision unit of astronomy.
Definition: Exactly 1/3600 degree, or 1/60 arcminute. Symbol is the double prime (″).
Where it is used: Telescope resolution and seeing, stellar parallax (the basis of the parsec), and precision surveying.
What is an arcminute?
An arcminute is one sixtieth of a degree, used where degrees are too coarse.
Definition: Exactly 1/60 degree. Symbol is the prime (′).
Where it is used: Navigation and latitude (one arcminute of latitude is one nautical mile), astronomy, and optometry.
Arcseconds vs Arcminutes
The arcsecond and the arcminute belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many arcminutes are in an arcsecond?
One arcsecond equals 0.0166666667 arcminutes.
What is the formula to convert arcseconds to arcminutes?
Multiply the number of arcseconds by 0.0166666667. To reverse it, divide by 0.0166666667 instead.
How do I convert arcminutes back to arcseconds?
Divide by 0.0166666667, which is the same as multiplying by 60.
How many arcminutes are in 10 arcseconds?
10 ″ works out to 0.166667 ′.
How is the arcsecond defined?
Exactly 1/3600 degree, or 1/60 arcminute. Symbol is the double prime (″).