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Angle Converter - Degrees, Radians & Angle Unit Converter

Convert between degrees, radians, gradians, mils, arcminutes, arcseconds and more instantly

What is Angle Converter?

Angle Converter is a free online tool that converts between different units of angular measurement. It supports common units (degrees, radians, gradians), precise units (arcminutes, arcseconds), military units (mils, milliradians), and surveying units. Perfect for mathematics, engineering, navigation, and astronomy.

How to Use Angle Converter

  1. Enter the angle value in the input field
  2. Select the source unit from the dropdown menu
  3. Select the target unit from the output dropdown
  4. The conversion happens automatically as you type
  5. Use the "Swap Units" button to quickly reverse the conversion
  6. Copy the result using the copy button
  7. Use "Clear" to reset all values

Supported Units

Common Units

  • • Degrees (°) - 360° in a full circle
  • • Radians (rad) - 2Ï€ rad in a full circle
  • • Gradians (grad) - 400 grad in a full circle
  • • Turns - 1 turn = full rotation

Precise Units

  • • Arcminutes (′) - 1/60 of a degree
  • • Arcseconds (″) - 1/3600 of a degree

Military Units

  • • Mils (NATO) - 6400 mils in a full circle
  • • Milliradians (mrad) - 1000 mrad ≈ 57.3°

Surveying Units

  • • Gons (gon) - Same as gradians

Common Angle Conversions

Key Conversions

  • • 1° = Ï€/180 rad ≈ 0.01745 rad
  • • 1 rad = 180°/Ï€ ≈ 57.296°
  • • 90° = Ï€/2 rad ≈ 1.571 rad
  • • 180° = Ï€ rad ≈ 3.14159 rad

Common Angles

  • • Right angle: 90° = Ï€/2 rad
  • • Straight angle: 180° = Ï€ rad
  • • Full circle: 360° = 2Ï€ rad
  • • 45°: Ï€/4 rad ≈ 0.785 rad

Frequently Asked Questions

How accurate are the conversions?

All conversions use standard conversion factors and are accurate to 6 decimal places. For most practical purposes, this provides excellent precision.

When should I use radians vs degrees?

Degrees are more intuitive for everyday use, while radians are preferred in mathematics and physics because they simplify many formulas and calculations.

What are mils used for?

Mils are commonly used in military applications for artillery and navigation because they provide a convenient way to measure small angles with good precision.

Is my data secure?

Yes, all calculations happen locally in your browser. Your data never leaves your device.

Can I use this offline?

Yes, once loaded, the converter works completely offline in your browser.