Degree to Radian Converter
Convert degrees to radians instantly. Free, bidirectional, and fully in-browser.
About this tool
Degree to Radian Converter
Convert degrees to radians instantly. Free, bidirectional, and fully in-browser.
1 degree equals 0.01745329252 radians — enter any degree value to convert it to radians instantly. This Degree to Radian converter is a client-side tool: it applies a single multiplication (rad = ° × 0.01745329252) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert radians back to degrees. A reference table lists common degree values already converted, and nothing you enter is sent to a server.
How to use Degree to Radian Converter
- 1
Open Degree to Radian Converter on AltFTool — it loads instantly in your browser.
- 2
Type the value you want to convert into the Degree field.
- 3
Read the equivalent in radians in the result field, and copy it if needed.
- 4
Use the decimal-places slider for more or less precision, or press swap to convert radians to degrees.
Why use Degree to Radian Converter
Instant, both ways
The result updates as you type, and the swap button flips the conversion to radian → degree without reloading.
Exact Angle math
The conversion uses the precise factor (rad = ° × 0.01745329252), so the number matches a manual calculation to the decimal places you choose.
Adjustable precision
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Private and free
Everything runs locally in your browser — no upload, no account, no limit on conversions.
Common use cases
- Converting a degree measurement to radians for a spec, listing, or report.
- Checking degree↔radian figures while comparing products, datasets, or documentation.
- Learning the degree-to-radian relationship from the worked formula and the common-value table.
Frequently asked questions
How many radians are in a degree?
One degree is 0.01745329252 radians. Multiply the degree value by 0.01745329252 to convert. For example, 10 ° = 0.1745329252 rad.
What is the formula to convert degrees to radians?
rad = ° × 0.01745329252. This tool applies it automatically and shows a worked example: 10 ° = 0.1745329252 rad.
Can it convert radians back to degrees?
Yes. Press the swap button, or type into the radian field, and the tool converts radians to degrees using the inverse of the same relationship.
Is the conversion accurate?
It uses the standard angle and rotation definition (rad = ° × 0.01745329252), not a rounded approximation, so results are exact to the number of decimal places you select.
Does this work offline and stay private?
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Embed this tool on your site
Add the Degree to Radian Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/degrees-to-radians-converter"
title="Degree to Radian Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/degrees-to-radians-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>