---
title: "Angle Converter calculator — AperiOptic"
description: "Convert between degrees, radians, milliradians, arc-minutes and arc-seconds. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/angle-converter"
---

# Angle Converter calculator

Convert between degrees, radians, milliradians, arc-minutes and arc-seconds.

Category: [Unit Converters](https://aperioptic.com/calculators)

Formula: `1 rad = 180/π deg ≈ 57.2958°`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Angle | `x` | deg | 1 |

## Result with the default inputs

- Degrees: 1 °
- Radians: 0.0175 rad
- Milliradians: 17.4533 mrad
- Arc-minutes: 60 ′
- Arc-seconds: 3600 ″

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/angle-converter?x=1`](https://aperioptic.com/calculators/angle-converter?x=1). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Radian](https://en.wikipedia.org/wiki/Radian)

[All optics calculators](https://aperioptic.com/calculators)

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The interactive page: https://aperioptic.com/calculators/angle-converter (AperiOptic runs in the browser; free, no account). Every page of the site as Markdown: https://aperioptic.com/llms.txt