Convert

Arcsecond to Degree

Exact answer: 1 ″ = 0.000277777778 ° (exact defined factor)

Arcsecond and Degree describe the same quantity from the Angle family but come from different systems of units. The factor is defined exactly. Angles appear in geometry, navigation, surveying, mechanical engineering and graphics.

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Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

What do you want to convert?

From1 ″

Result0.000278 °

Factor1 ″ = 0.000277777778 °

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

011 ″ = 0.000278 °

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

Degrees and radians are often mixed in software, geometry and trigonometry. Formulas usually expect a specific angle unit.

03Base unit: rad

1 ″ = 4.8481368111e-6 rad. Then the value is converted through the base unit rad into Degree.

Table

Arcsecond to Degree
Arcsecond	Degree
1	0.000278
60	0.016667
3,600	1
7,200	2
36,000	10
1,000,000	277.777778

Formula

1 ″ = 4.8481368111e-6 rad. Then the value is converted through the base unit rad into Degree.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

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Degree to Radian° → radAngle Radian to Degreerad → °Angle Turn to Degreeturn → °Angle Degree to Turn° → turnAngle

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Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Angle. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Arcsecond to Degree?

1 ″ = 0.000277777778 °

Which formula does Arcsecond to Degree use?

1 ″ = 0.000004848137 rad. Then the value is converted through the base unit rad into Degree.

What is the most common mistake?

Degrees and radians are often mixed in software, geometry and trigonometry. Formulas usually expect a specific angle unit.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.