Angle Converter
Convert between angle units: degrees, radians, gradians (gons). Free, instant, with formula display.
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How It Works
- Enter an angle value — Type any number (positive or negative) into the input field.
- Select the source unit — Choose degrees, radians, or gradians as your starting unit.
- Select the target unit — Choose what to convert to. The result updates instantly.
- Check the formula — The conversion math is shown below the result so you can verify the calculation.
Common Angle Conversions
| Conversion | Formula |
|---|---|
| Degrees to Radians | rad = deg × (π/180) |
| Radians to Degrees | deg = rad × (180/π) |
| Degrees to Gradians | grad = deg × (200/360) = deg × 0.9 |
| Gradians to Degrees | deg = grad ÷ 0.9 |
| Radians to Gradians | grad = rad × (200/π) |
Quick Reference: 180° = π rad = 200 grad. A full circle = 360° = 2π rad = 400 grad.
About Angle Converter
Quickly convert between degrees, radians, and gradians (also called gons). Whether you're doing trigonometry, surveying, or engineering calculations, this tool handles all common angle units.
3 Angle Units
Degrees (°), radians (rad), and gradians (gon). Covers all common angle measurement systems used in math and engineering.
Real-Time Conversion
Results update instantly as you type or change units. No button clicking required.
Formula Display
See the exact conversion formula used. Great for learning the relationship between angle units.
Private & Offline
All math runs in your browser. No data is sent to any server. Works without internet after loading.