Arctangent to Radians Reference Values
Calculate inverse tangent and return the principal angle in radians.
Table of Contents
Reference Value Index
This page lists 25 reference values for quick browsing and lookup.
All Reference Values
- -20 Tangent Value = -1.520838 rad
- -15 Tangent Value = -1.504228 rad
- -12.5 Tangent Value = -1.490966 rad
- -10 Tangent Value = -1.471128 rad
- -8 Tangent Value = -1.446441 rad
- -6 Tangent Value = -1.405648 rad
- -5 Tangent Value = -1.373401 rad
- -4 Tangent Value = -1.325818 rad
- -3 Tangent Value = -1.249046 rad
- -2 Tangent Value = -1.107149 rad
- -1 Tangent Value = -0.785398 rad
- -0.5 Tangent Value = -0.463648 rad
- 0 Tangent Value = 0 rad
- 0.5 Tangent Value = 0.463648 rad
- 1 Tangent Value = 0.785398 rad
- 2 Tangent Value = 1.107149 rad
- 3 Tangent Value = 1.249046 rad
- 4 Tangent Value = 1.325818 rad
- 5 Tangent Value = 1.373401 rad
- 6 Tangent Value = 1.405648 rad
- 8 Tangent Value = 1.446441 rad
- 10 Tangent Value = 1.471128 rad
- 12.5 Tangent Value = 1.490966 rad
- 15 Tangent Value = 1.504228 rad
- 20 Tangent Value = 1.520838 rad
Reference Table
| Tangent Value | atan(x) |
|---|---|
| -20 Tangent Value | -1.520838 rad |
| -15 Tangent Value | -1.504228 rad |
| -12.5 Tangent Value | -1.490966 rad |
| -10 Tangent Value | -1.471128 rad |
| -8 Tangent Value | -1.446441 rad |
| -6 Tangent Value | -1.405648 rad |
| -5 Tangent Value | -1.373401 rad |
| -4 Tangent Value | -1.325818 rad |
| -3 Tangent Value | -1.249046 rad |
| -2 Tangent Value | -1.107149 rad |
| -1 Tangent Value | -0.785398 rad |
| -0.5 Tangent Value | -0.463648 rad |
| 0 Tangent Value | 0 rad |
| 0.5 Tangent Value | 0.463648 rad |
| 1 Tangent Value | 0.785398 rad |
| 2 Tangent Value | 1.107149 rad |
| 3 Tangent Value | 1.249046 rad |
| 4 Tangent Value | 1.325818 rad |
| 5 Tangent Value | 1.373401 rad |
| 6 Tangent Value | 1.405648 rad |
| 8 Tangent Value | 1.446441 rad |
| 10 Tangent Value | 1.471128 rad |
| 12.5 Tangent Value | 1.490966 rad |
| 15 Tangent Value | 1.504228 rad |
| 20 Tangent Value | 1.520838 rad |
Frequently Asked Questions
Frequently asked questions for Arctangent to Radians and its reference values.
What does the Arctangent to Radians calculator do?
It helps with recovering angles from slope-like values and tangent ratios.
What formula does the Arctangent to Radians calculator use?
atan(x) returns the principal inverse tangent angle in radians, in the range (-π/2, π/2).
What inputs are valid?
Any finite tangent input value is valid.
When would I use this?
recovering angles from slope-like values and tangent ratios
Methodology and Review
Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.
Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.