Circle Circumference from Radius Reference Values
Calculate circle circumference from radius using C = 2πr.
Table of Contents
Reference Value Index
This page lists 20 reference values for quick browsing and lookup.
All Reference Values
- 1 units = 6.2832 units
- 2 units = 12.5664 units
- 3 units = 18.8496 units
- 4 units = 25.1327 units
- 5 units = 31.4159 units
- 6 units = 37.6991 units
- 7 units = 43.9823 units
- 8 units = 50.2655 units
- 9 units = 56.5487 units
- 10 units = 62.8319 units
- 11 units = 69.115 units
- 12 units = 75.3982 units
- 13 units = 81.6814 units
- 14 units = 87.9646 units
- 15 units = 94.2478 units
- 16 units = 100.531 units
- 17 units = 106.8142 units
- 18 units = 113.0973 units
- 19 units = 119.3805 units
- 20 units = 125.6637 units
Reference Table
| Radius | Circumference |
|---|---|
| 1 units | 6.2832 units |
| 2 units | 12.5664 units |
| 3 units | 18.8496 units |
| 4 units | 25.1327 units |
| 5 units | 31.4159 units |
| 6 units | 37.6991 units |
| 7 units | 43.9823 units |
| 8 units | 50.2655 units |
| 9 units | 56.5487 units |
| 10 units | 62.8319 units |
| 11 units | 69.115 units |
| 12 units | 75.3982 units |
| 13 units | 81.6814 units |
| 14 units | 87.9646 units |
| 15 units | 94.2478 units |
| 16 units | 100.531 units |
| 17 units | 106.8142 units |
| 18 units | 113.0973 units |
| 19 units | 119.3805 units |
| 20 units | 125.6637 units |
Frequently Asked Questions
Frequently asked questions for Circle Circumference from Radius and its reference values.
What does the Circle Circumference from Radius calculator do?
It calculates estimating perimeter distance around circular objects, wheels, or round openings from the values you enter.
What formula does the Circle Circumference from Radius calculator use?
Circumference = 2 × π × radius.
What inputs are valid?
Enter a positive radius greater than zero.
When would I use this?
estimating perimeter distance around circular objects, wheels, or round openings
Methodology and Review
Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.
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