Degrees and Radians in Calculator Work 指南

本指南說明 Check angle mode and unit conversion before using trigonometry, geometry, or engineering formulas.

指南更新 2026-05-11

使用流程

Use this guide when a converted number affects scientific calculators, trigonometry, geometry, rotation, and engineering notes. A reliable result keeps the original value, source unit, target unit, conversion factor, and rounding choice visible.

The goal is not to memorize every factor. The goal is to make the calculation traceable enough that someone else can review it later.

檢查清單

Confirm whether the calculator is in degree or radian mode.
Convert degrees to radians before formulas that expect radians.
Keep symbolic pi values as long as possible before rounding.

實用事實

Many programming languages expect trigonometric inputs in radians.

實用範例

180 degrees equals pi radians.

90 degrees equals pi / 2 radians.

1 radian is about 57.2958 degrees.

常見問題

What should I check first?

Confirm the source unit and target unit before changing the number.

When should I round?

Round at the end, after formulas and related conversions are complete.

Which calculator should I use next?

Use the related calculators below to check the main values from this guide.

重點

A useful conversion is traceable: it shows the original unit, the target unit, the factor used, and the rounding decision.