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Convert angles.
Degrees to radians for trigonometry, arcminutes and arcseconds for astronomy and surveying.
Angle
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9 units
Common angle conversions
Each of these has its own page with the formula, a values table and both directions.
Every angle unit on this page
- radian rad
- The SI base unit of angle, defined as the angle subtended by an arc whose length equals the radius. Used throughout trigonometry and calculus.
- degree °
- One 360th of a full turn. The everyday unit for angles in navigation, surveying, geometry and most general contexts.
- gradian gon
- One 400th of a full turn, also called a grade. Favoured in surveying and some engineering disciplines.
- milliradian mrad
- A thousandth of a radian. Used in military targeting, telescope sights and precision angular measurement.
- arcminute ′
- One 60th of a degree, also called a minute of arc. Essential in astronomy, surveying and high-precision angle work.
- arcsecond ″
- One 60th of an arcminute, one 3600th of a degree. Used for extreme precision in astronomy and astrometry.
- turn turn
- One complete 360-degree rotation. A natural unit when counting complete rotations or cycles.
- quadrant quad
- One quarter of a full turn, 90 degrees. The angle between perpendicular lines.
- NATO mil mil
- One 6400th of a full turn. Used in military artillery, ballistics and weapons systems for targeting.
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