Degrees to Radians Calculator
Convert an angle from degrees to radians.
Enter your values
Enter the angle in degrees.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Radians
- 2.356194 rad
- As multiple of pi
- 0.75π
- Degrees
- 135°
Quick answer
Radians = degrees x (pi/180).
rad = deg * pi/180
At a glance
| What it does | Convert an angle from degrees to radians. |
|---|---|
| Category | Math |
| Inputs needed | Angle |
| Main output | Radians |
| Formula | rad = deg * pi/180 |
| Cost | Free — no sign-up, no download |
How to use the Degrees to Radians Calculator
- 1Enter the angle in degrees.
- 2Multiply by pi/180 to convert to radians.
- 3The result is also shown as a fraction of pi for common angles.
Inputs explained
- Angle(degrees)
- Enter the angle in degrees.
Worked example
Using the values the calculator loads with:
Inputs
- Angle135 degrees
Results
- Radians2.356194 rad
- As multiple of pi0.75π
- Degrees135°
Frequently asked questions
Why use radians?
Radians are the natural unit for calculus and trig identities since they relate arc length directly to angle.
What is 180 degrees in radians?
Exactly pi radians (~3.1416).
What do I need to enter into the Degrees to Radians Calculator?
Just 1 value: angle. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Degrees to Radians Calculator work out the answer?
Radians = degrees x (pi/180). It applies the formula rad = deg * pi/180 and shows the working so you can check each step by hand.
Is the Degrees to Radians Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.