Convert degrees to radians instantly: 1 degree = 0.01745329252 rad. Type a value to see the result with the formula, swap direction with one tap, or pick any other angle units from the dropdowns. Convert between 6 angle units, with the formula and a full table of equivalents.
What does this tool do?
The angle converter is a fast, no-sign-up converter for angle units from degrees to radians and gradians. Enter any number in the Degree field and the equivalent in radians appears immediately, together with the conversion formula for transparency. You can reverse the conversion with the swap control, choose any of the 6 angle units from the dropdowns, and copy the result in one tap. Everything runs in your browser, so it works on slow connections and never sends your numbers anywhere.
Keep it bookmarked or on your home screen — utilities prove their worth through repetition, and the one you can open in two taps is the one you will actually use when the need strikes.
How do I use this tool?
The tool is ready the moment the page opens — no setup, no account. The steps below cover everything it does.
- Type the value into the “Degree” field.
- Read the converted value in radians — the formula used is shown underneath.
- Tap “Copy result” to copy the answer to your clipboard.
- Use the swap button (⇄) to reverse the conversion direction.
- Pick any other angle units from the “From” and “To” dropdowns.
How Degree to Radian conversion works
rad = ° × 0.01745329252
Both units are defined exactly against the SI base unit, so the factor 0.01745329252 is exact, not an approximation. Example: 10 ° = 0.1745329252 rad. The result is displayed with up to 10 significant figures — more precision than any everyday measurement needs.
Timing and randomness use the browser’s high-resolution clocks and cryptographic random source — the best available in a web page, accurate far beyond what everyday uses need. Display rounding is the only approximation.
Degree to Radian conversion table
| Unit | Symbol | About |
|---|---|---|
| Degree | ° | One 360th of a full turn. |
| Radian | rad | The SI unit of angle; a full turn is 2π radians. |
| Gradian | gon | One 400th of a full turn, used in surveying. |
| Arcminute | ′ | One 60th of a degree. |
| Arcsecond | ″ | One 60th of an arcminute. |
| Turn | tr | One full rotation. |
Where is this tool used in Pakistan?
Students across Pakistan’s boards convert degrees to radians for mathematics and physics, from BISE exams to university engineering courses. Masons and welders set angles in degrees on site, navigation and the Qibla bearing are expressed in degrees, and technical drawings sometimes use gradians. Quick conversion between these units keeps both homework and site work accurate.
These are the tools people recommend to each other on WhatsApp — simple, free, no install — because they solve the small problems everyone hits: timing something, picking fairly, testing a device. Bookmark the ones you use; they age well.
Limitations
Conversions are mathematically exact. Displayed decimals are rounded; for precision machining or navigation, carry as many digits as your instrument can actually resolve.
Convenience tools are not certified instruments: fine for everyday purposes, but do not stake safety, money or legal outcomes on a browser utility. Know which category your use falls into.
Frequently asked questions
How many radians are in one degree?
Exactly 0.01745329252 rad. Both units have exact international definitions, so this factor is not rounded — any rounding you see is only in how many decimals are displayed.
How do I convert radians back to degrees?
Tap the swap button (⇄) above the result to reverse the direction instantly, or open the dedicated Radian to Degree converter page.
Can I convert between other angle units?
Yes. The From and To dropdowns list all 6 angle units this converter knows — pick any pair, for example Degree to degree or gradian to radian.
How accurate is the result?
It uses the exact defined values of both units and displays up to 10 significant figures — far more precision than any ruler, scale or bill needs. The conversion itself introduces no error; only the displayed decimals are rounded.
Is my conversion private? Does anything get uploaded?
Yes, it is private. The conversion runs as JavaScript in your browser the moment you type — your numbers are never uploaded, stored or sent to any server.
What is the ° to rad formula in words?
Multiply the degrees value by 0.01745329252 to get radians. To go the other way, divide by the same factor.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested