Angle Converter
Convert between 7 angle units — degree, radian, gradian (gon), turn, arc minute, arc second, NATO mil. Math, astronomy, surveying, military.
What powers the Angle Converter
7 angle units
360° = 2π rad = 400 gon = 1 turn
Arc minute / arc second for astronomy
NATO mil for military / artillery
All units shown simultaneously
Why the Angle Converter is different
Browser-native
The Angle Converter runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Math / physics homework (degree ↔ radian)
- Astronomy (arc seconds for star separation)
- Surveying (degrees, gradians for European maps)
- Military / ballistics (mils for elevation/azimuth)
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.