Is my data uploaded to a server?

No. All calculations run locally in your browser using JavaScript.

What is the difference between degrees and radians?

Both measure the same thing — the size of an angle. Degrees split a circle into 360 parts (historical convention). Radians are the mathematically natural unit: the angle equals the arc length divided by the radius. Programming functions like Math.sin() in JavaScript use radians.

What are gradians used for?

Gradians (also called gons or grades) divide a circle into 400 parts. A right angle is exactly 100 gradians, making right-angle arithmetic clean. They are used in European surveying, cartography and some scientific fields.

What is a milliradian (mrad)?

A milliradian is 1/1000 of a radian. It is used in military ballistics and optics for precision angular measurements. At 1000m range, 1 mrad corresponds to exactly 1m of movement.

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Angle Converter

Convert angles between degrees, radians, gradians, turns and arcminutes instantly. Free, browser-based, no signup.

🔄 Conversion Tools Free Browser-based

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Value

Unit

Angle Units Explained

Angles can be measured in several ways. Degrees (°) divide a full circle into 360 parts. Radians are the SI unit — a full circle is 2π radians. Gradians (or gons) divide a full circle into 400 parts, used in surveying. Turns express angle as a fraction of a full revolution.

Conversion Reference

Angle	Degrees	Radians	Gradians
Right angle	90°	π/2 ≈ 1.5708	100 grad
Straight angle	180°	π ≈ 3.1416	200 grad
Full circle	360°	2π ≈ 6.2832	400 grad
1 radian	≈ 57.296°	1	≈ 63.662

Arcminutes & Arcseconds

Used in astronomy, navigation and optics: 1° = 60 arcminutes (′) = 3600 arcseconds (″). GPS coordinates use decimal degrees or degrees-minutes-seconds (DMS) notation.

Angle Converter

Angle Units Explained

Conversion Reference

Arcminutes & Arcseconds

Frequently Asked Questions