1. What is the Diameter Formula?

The diameter formula calculates the diameter of a circle from its radius. The diameter is twice the length of the radius, making it the longest chord that passes through the center of the circle.

2. How Does the Calculator Work?

The calculator uses the diameter formula:

Where:

• \( D \) — Diameter of the circle (m)
• \( r \) — Radius of the circle (m)

Explanation: The diameter is always exactly twice the length of the radius in any circle, regardless of the circle's size.

3. Importance of Diameter Calculation

Details: Calculating diameter from radius is fundamental in geometry, engineering, construction, and various scientific applications where circular measurements are required.

4. Using the Calculator

Tips: Enter the radius value in meters. The radius must be a positive number greater than zero. The calculator will automatically compute the diameter.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between diameter and radius?
A: The diameter is exactly twice the radius (D = 2r), and the radius is half the diameter (r = D/2).

Q2: Can I use different units for radius and diameter?
A: Yes, but both radius and diameter will use the same unit system. If radius is in meters, diameter will also be in meters.

Q3: What if I have the circumference instead of radius?
A: You can calculate diameter from circumference using the formula D = C/π, where C is the circumference.

Q4: Is this formula valid for all circles?
A: Yes, the relationship D = 2r holds true for all perfect circles, regardless of size.

Q5: How accurate is this calculation?
A: The calculation is mathematically exact. The accuracy depends on the precision of your radius measurement.