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RADIANS
RADIANS multiplies an angle in degrees by π/180 to produce the equivalent radian measure. Since Excel and Google Sheets trigonometric functions (SIN, COS, TAN) expect radians, this function is the standard bridge when your data is in degrees.
Excel
=RADIANS(A2)Google Sheets
=RADIANS(A2)✓
Verified example
Computed by a real spreadsheet engine on the sample data below.
| Degrees | Radians |
| 0 | |
| 90 | |
| 180 | |
| 360 |
=RADIANS(A2)→0
Try it with your data
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How it works
- 1A2 is the angle in degrees to convert (e.g. 180).
- 2RADIANS multiplies the value by π/180, so RADIANS(180) returns π ≈ 3.14159.
- 3Pipe directly into trig functions: =SIN(RADIANS(A2)).
Need a version for your data?
Try: “Convert a column of degree angles to radians for use in trig formulas”