Use this circle area calculator to quickly compute the area of a circle using its radius. Perfect for calculate circle area tasks.
A = area of the circle
r = radius of the circle
π ≈ 3.14159
| Radius | Area |
|---|---|
| 1 | 3.141593 |
| 2 | 12.566371 |
| 3 | 28.274334 |
| 5 | 78.539816 |
| 10 | 314.159265 |
1. Measure the radius of the circle.
2. Square the radius.
3. Multiply the squared radius by π.
This circle area calculator automatically computes the area with up to six decimal places. Ideal for students, engineers, and designers who need precise calculate circle area results.
• Circles have infinite lines of symmetry.
• The concept of π dates back to ancient civilizations.
• Circles appear in wheels, coins, and architecture.
• The area formula is derived from integral calculus.
• Circle geometry is fundamental in physics and engineering.