Plane Angle Unit Converter
Effortlessly switch between any angle units. Our tool provides instant and accurate conversions for your needs.
Fast, Free, Private Angle Unit Converter (Offline)
Convert plane angle units instantly radians (rad), degrees (°), gradians (gon), arcminutes (′), arcseconds (″), milliradians (mrad), and turns (rev). 100% client side, lifetime free, unlimited use. No uploads, no sign ups, truly private.
Top, fast, best-in-class, and unlimited. Your information is 100% confidential and secure.
Why people love this angle converter
Offline & secure
Runs entirely in your browser. Your values never leave your device.
Unlimited & free forever
No accounts, no limits convert as much as you want.
Fast & simple
Pick units, type a value, get results instantly with clear precision.
Works everywhere
Modern browsers on Windows, Mac, Linux, and mobile devices.
No data collected
100% client-side processing keeps your data private.
Accurate results
Precise π-based conversion factors with smart rounding.
Popular uses worldwide
Math & trigonometry
Convert rad ↔ deg for formulas, exams, and tutoring.
Engineering & CAD
Snap between degrees and radians for models and simulations.
Navigation & surveying
Work with gradians (gon), bearings, and precise arcs.
Astronomy
Convert arcminutes and arcseconds to radians or degrees.
Optics & physics
Use milliradians and small-angle approximations.
Shooting & ballistics
Compare MOA (arcminutes) and mrad for zeroing and adjustments.
How to convert angle units
- Select your “From” unit (e.g., degrees).
- Enter a value (e.g., 45).
- Select your “To” unit (e.g., radians).
- See instant results and the 1 unit summary below.
- Use “Reset” to start again.
Tip: Change either side both fields update intelligently.
Supported units
Best practices
- Know your unit conventions (deg, rad, gon) before sharing calculations.
- For small angles, arcminutes and arcseconds preserve precision.
- In shooting, “true MOA” (1/60°) vs “IPHY” can differ on targets check your scope/manual.
- Round only at the end if you’ll do further calculations.
- Keep original values for auditing and reproducibility.
Frequently Asked Questions
Radians vs degrees what’s the difference?
Degrees split a circle into 360 parts; radians use arc length relative to radius (2π rad in a full turn).
How do I convert degrees to radians?
radians = degrees × π/180. Example: 90° = π/2 rad.
What is a turn (revolution)?
One full circle. 1 rev = 360° = 2π rad = 400 gon.
What are arcminutes and arcseconds?
1° = 60′ (arcminutes); 1′ = 60″ (arcseconds). Useful for fine angular measurements.
What about MOA vs mrad for shooting?
1 MOA = 1/60°. 1 mrad = 0.001 rad. At 100 yd, 1 MOA ≈ 1.047 in; 0.1 mrad ≈ 0.36 in. Check scope specs.
Does it work offline?
Yes. Your browser can cache assets after the first visit and run offline.
Global availability (GEO)
Built for users worldwide: USA, UK, Canada, Australia, India, EU (Germany, France, Spain, Italy, Netherlands), Middle East (UAE, Saudi Arabia), Asia (Singapore, Malaysia, Philippines, Indonesia, Japan, South Korea), Africa (Nigeria, South Africa, Egypt), and Latin America (Brazil, Mexico, Argentina).
Also searched as: angle unit converter, radians to degrees, degrees to radians, arcminutes to degrees, arcseconds to radians, gradians (gon) to degrees, mrad to degrees, turn to degrees, revolution to radians, MOA to mrad.
Multilingual: conversor de ángulos / radianes a grados (ES), convertisseur d’angle / radians en degrés (FR), Winkel-Umrechner / Radiant in Grad (DE), convertitore di angoli / radianti in gradi (IT), conversor de ângulo / radianos para graus (PT), конвертер углов / радианы в градусы (RU), 角度変換 / ラジアンから度へ (JA), 角度单位换算 / 弧度转角度 (ZH), 각도 변환기 / 라디안↔도 (KO), açı dönüştürücü (TR), konwerter kątów (PL), hoek converter (NL), bộ chuyển đổi góc (VI), konverter sudut (ID), ตัวแปลงหน่วยมุม (TH), محول الزوايا (AR), कोण परिवर्तक (HI).
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