Arctangent to Radians
Calculate inverse tangent and return the principal angle in radians.
Table of Contents
0 Tangent Value =
0 rad
Representative value from the Arctangent to Radians reference table.
Reference Values
Browse 25 reference values with individual detail pages for quick lookup.
Arctangent to Radians
Calculate inverse tangent and return the principal angle in radians.
Calculated Result
—
Reference Table
Use this complete table for quick lookup and internal linking to specific value pages.
| 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
Common questions about Arctangent to Radians, formulas, and typical use cases.
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
This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.
Editorial metadata (author, reviewer, and update date) is rendered on the page and in structured data. See our editorial policy, review process, and corrections policy.
For compliance-sensitive work, verify final values against project requirements, governing standards, and manufacturer documentation.