Circle Area from Radius Reference Values
Calculate the area of a circle from radius using A = πr².
Table of Contents
Reference Value Index
This page lists 20 reference values for quick browsing and lookup.
All Reference Values
- 1 units = 3.1416 sq units
- 2 units = 12.5664 sq units
- 3 units = 28.2743 sq units
- 4 units = 50.2655 sq units
- 5 units = 78.5398 sq units
- 6 units = 113.0973 sq units
- 7 units = 153.938 sq units
- 8 units = 201.0619 sq units
- 9 units = 254.469 sq units
- 10 units = 314.1593 sq units
- 11 units = 380.1327 sq units
- 12 units = 452.3893 sq units
- 13 units = 530.9292 sq units
- 14 units = 615.7522 sq units
- 15 units = 706.8583 sq units
- 16 units = 804.2477 sq units
- 17 units = 907.9203 sq units
- 18 units = 1,017.876 sq units
- 19 units = 1,134.1149 sq units
- 20 units = 1,256.6371 sq units
Reference Table
| Radius | Circle Area |
|---|---|
| 1 units | 3.1416 sq units |
| 2 units | 12.5664 sq units |
| 3 units | 28.2743 sq units |
| 4 units | 50.2655 sq units |
| 5 units | 78.5398 sq units |
| 6 units | 113.0973 sq units |
| 7 units | 153.938 sq units |
| 8 units | 201.0619 sq units |
| 9 units | 254.469 sq units |
| 10 units | 314.1593 sq units |
| 11 units | 380.1327 sq units |
| 12 units | 452.3893 sq units |
| 13 units | 530.9292 sq units |
| 14 units | 615.7522 sq units |
| 15 units | 706.8583 sq units |
| 16 units | 804.2477 sq units |
| 17 units | 907.9203 sq units |
| 18 units | 1,017.876 sq units |
| 19 units | 1,134.1149 sq units |
| 20 units | 1,256.6371 sq units |
Frequently Asked Questions
Frequently asked questions for Circle Area from Radius and its reference values.
What does the Circle Area from Radius calculator do?
It calculates finding surface coverage for circular plates, pipes, and round cutouts from the values you enter.
What formula does the Circle Area from Radius calculator use?
Area = π × radius².
What inputs are valid?
Enter a positive radius greater than zero.
When would I use this?
finding surface coverage for circular plates, pipes, and round cutouts
Methodology and Review
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