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Angle Converter

The Angle Converter allows you to convert between various angle units quickly and accurately. It supports degrees, radians, gradians, arcminutes, and arcseconds.

Unit Converter

Convert angle units instantly.

Mode

Batch mode converts multiple values (paste one number per line).

Value

Values (batch mode)

From

Precision (decimal places)

Free · API · MCPToolYour platform

Use Angle Converter three ways

The free Angle Converter on this page works in your browser. The same workflow is available via REST API for apps and via MCP for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the unit-conversions module under Business Tools.

Free in browserUse Angle Converter here — no account required.
REST APICall from your server with X-Api-Key.
MCP for agentsConnect Cursor or Claude to ToolYour MCP with the same key.

1. Get an API keySign in and open Dashboard → API Keys (works for REST and MCP).
2. Call or connectUse the REST API from your server, or paste the MCP URL into your agent config.
3. Same qualityOutput matches the free web tool across all three surfaces.

Manage API keys MCP setup API reference Create free account

What is Angle Converter?

Use the Angle Converter to easily convert between angle units like degrees, radians, and gradians. Perfect for geometry, navigation, or physics calculations, this tool delivers instant results directly in your browser. Simply enter your angle value, select the units, and get accurate conversions without any software installation. Try it today for quick and reliable angle conversions.

What are common questions about Angle Converter?

How do I convert radians to degrees?

To convert Radians to Degrees, select 'Radians' as your 'Convert From' unit and 'Degrees' as your 'Convert To' unit. Enter the value in Radians, and the converter will instantly show you the equivalent in Degrees. The conversion factor is 180/π (since π radians = 180 degrees).

How accurate is the Angle Converter?

Our online Angle Converter uses precise, standard mathematical conversion factors based on the defined relationships between angle units (e.g., 360 degrees in a circle, 2π radians in a circle), ensuring high accuracy suitable for mathematical, scientific, and technical applications.

What angle units are supported by this converter?

Our tool supports a wide range of angle units, including Degrees (°), Radians (rad), Gradians (grad or gon), Arcminutes ('), Arcseconds ("), and Turns or Circles.

What are Gradians (gon) and where are they used?

The Gradian (grad or gon) is an angular unit where a right angle is divided into 100 gradians. There are 400 gradians in a full circle. Gradians are primarily used in surveying and some areas of engineering in certain countries as part of the metric system, although degrees and radians are more common globally in mathematics and physics.

Is the Angle Converter tool completely free?

Yes, our Angle Converter is 100% free to use online. There are no costs, subscriptions, or limitations on the number of angle conversions you can perform.

How do I convert degrees to radians?

To convert Degrees to Radians, select 'Degrees' as your 'Convert From' unit and 'Radians' as your 'Convert To' unit. Enter the value in Degrees, and the converter will instantly show you the equivalent in Radians. The conversion factor is π/180 (since 180 degrees = π radians).

What are the key features of Angle Converter?

Supports All Major Angle Units (Degrees, Radians, Gradians, Arcminutes, Arcseconds)

Convert between a comprehensive range of angle units, including Degrees (°), Radians (rad), Gradians (grad or gon), Arcminutes ('), Arcseconds ("), and full Circles or Turns. Covers units used in mathematics, engineering, surveying, navigation, and astronomy.

Get Instant, Accurate Angle Conversions

Receive precise angle conversion results in real-time as you enter values. Our converter uses standard, accurate formulas based on the relationships between units (e.g., 360 degrees = 2π radians) for reliable measurements every time.

Precise Results for Geometry, Navigation, & Astronomy

Whether you're performing calculations in geometry or trigonometry, calculating bearings in navigation, analyzing astronomical positions (using arcminutes/seconds), or converting survey data, rely on our tool for high-precision angle conversions.

Easy-to-Use Angle Converter

Convert angle units quickly and effortlessly with a clean, intuitive interface. Our tool is designed for speed and simplicity, accessible on any device.

How do you use Angle Converter?

Get Your Accurate Conversion Results

See the precise converted angle displayed immediately for the target unit you selected. Fast, accurate, and reliable angle unit conversion.

Select Your Angle Units

Choose the angle unit you want to convert from and to. For example, select Degrees to Radians, Gradians to Degrees, or Arcminutes to Arcseconds.

Enter the Angle Value

Input the angle measurement value that you need to convert into the designated field. The tool will instantly calculate the conversion.

What is an Angle?

An angle is a measure of the rotation between two intersecting lines or planes. It quantifies the amount of turning around a point or axis. Angles are fundamental in geometry, trigonometry, physics, engineering, and various applications involving direction, orientation, and rotation.

Applications in Surveying, Navigation, and Astronomy

Our Angle Converter is highly applicable. Surveyors convert angles between degrees, gradians, and decimal degrees. Navigators use degrees and related units for bearings and positions. Astronomers measure positions and separations of celestial objects in degrees, arcminutes, and arcseconds. Engineers convert rotational angles (often in degrees or radians) for mechanical or electrical system design. It's a versatile tool for anyone working with angular measurements.

Degrees, Minutes, Seconds (DMS) vs. Decimal Degrees

Angles less than a degree can be expressed in decimal degrees (e.g., 45.5°) or in Degrees, Minutes, and Seconds (DMS) format (e.g., 45° 30' 0''). One degree equals 60 minutes, and one minute equals 60 seconds. Conversions between DMS and decimal degrees are common. Our converter primarily works with decimal values for input and output but can handle conversions between degrees, arcminutes, and arcseconds.

Why Accurate Angle Conversion is Important

Accurate angle conversion is crucial for ensuring correctness in mathematical and scientific calculations (especially in trigonometry and calculus, where radians are often required), for compatibility between different measuring instruments or software (which might use different units), and for precision in fields like surveying, navigation, astronomy, and mechanical engineering involving rotation and orientation. Precision prevents significant errors.

Converting Between Different Angle Units

Converting between angle units involves applying specific conversion factors based on the fundamental relationships between them. For example, since a full circle is 360 degrees, 2π radians, and 400 gradians, we have conversion factors like 1 degree = π/180 radians, 1 radian = 180/π degrees, 1 gradian = 0.9 degrees, etc. Converting degrees to arcminutes and arcseconds involves factors of 60. Our online converter handles these precise calculations automatically.

Common Angle Units: Degrees, Radians, and Gradians

The **Degree (°) ** is the most common unit for everyday use, with a circle divided into 360 degrees. Each degree is subdivided into 60 Arcminutes (') and each arcminute into 60 Arcseconds (''). The Radian (rad) is the standard unit for angular measurement in mathematics and physics; one radian is the angle subtended by an arc whose length is equal to the radius of the circle (a full circle is 2π radians). The Gradian (grad or gon) divides a right angle into 100 gradians, with 400 gradians in a circle, sometimes used in surveying.