Degree Rad Calculator
Degree to rad calculator works out Converted value and Unrounded result from Value, Reading and Ruler divisions per inch. The default figures on this page give converted value of 0.017453; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- 1 deg = 0.0174532925199 rad
- 1 x 0.0174532925199 = 0.01745329252 rad
Its 12 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the degree to rad calculator calculates
Converts a quantity between any two units of the same physical family using exact SI-derived factors.
How to use this degree to rad calculator
Enter Value, Reading, Ruler divisions per inch and Feet. Converted value updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Converted value, Unrounded result and Conversion.
The method follows NIST Special Publication 811, Guide for the Use of the International System of Units and BIPM, The International System of Units (SI Brochure).
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I convert degree into radians?
Converts a quantity between any two units of the same physical family using exact SI-derived factors. Open “How this is worked out” beside the result to see each step for your own figures.
How many degrees is 1 rad?
On the figures this page opens with — value 1 — the converted value is 0.017453. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How to convert degree to radian in calculator?
It needs Value, Reading, Ruler divisions per inch, Feet, Inches and Significant figures. Nothing else is required, and the figures stay in your browser.
Is 1 rad 180 degrees?
Converts a quantity between any two units of the same physical family using exact SI-derived factors. On the figures this page opens with — value 1 — the converted value is 0.017453. Put your own figures in their place and the working updates beside the result.
What information do I need for the degree to rad calculator?
You need Value, Reading, Ruler divisions per inch, Feet, Inches and Significant figures. The page opens with default figures that give converted value of 0.017453, so you can see the scale before entering your own.
What does this degree to rad calculator show?
It shows Converted value, Unrounded result, Conversion, Reading, Multiply by and Reverse conversion, with the working and any warnings for your entries.