Arc Length Calculator

Enter exactly two values to calculate the third:

r

Blue: Radius (r) | Green: Angle (θ) | Red: Arc (s)

Formula

s = r × θ (in radians) = r × (θ° × π/180)

Where: s = arc length, r = radius, θ = central angle

Overview

This calculator finds the missing value among radius, angle, and arc length. It uses a simple formula to compute the answer. It makes the math easy to follow.

How It Works

You provide two values. The tool then calculates the missing value. It converts degrees to radians when needed. The tool shows the steps and formula used.

How to Use This Tool

  1. Enter any two fields. You can choose between radius, angle, and arc length.
  2. Click the "Calculate" button.
  3. View the result on the screen.
  4. If you want to start over, click the "Clear All" button.

Input Field Explanation

Understanding the Output

The result area shows the missing value. It also presents each calculation step. You can see how the result is computed.

Limitations and Notes

Only two values must be entered at once. The tool works best with numbers. Do not enter all three values.

Common Use Cases

This calculator is useful for homework, engineering projects, and design plans. It helps verify manual computations in a clear way.

Formula

The formula is:

s = r × θ (in radians) = r × (θ° × π/180)

Where s is arc length, r is radius, and θ is the central angle.