Diameter to Circumference Reference Values
Convert a circle diameter directly to circumference using C = πd.
Table of Contents
Reference Value Index
This page lists 20 reference values for quick browsing and lookup.
All Reference Values
- 1 units = 3.1416 units
- 2 units = 6.2832 units
- 3 units = 9.4248 units
- 4 units = 12.5664 units
- 5 units = 15.708 units
- 6 units = 18.8496 units
- 7 units = 21.9911 units
- 8 units = 25.1327 units
- 9 units = 28.2743 units
- 10 units = 31.4159 units
- 11 units = 34.5575 units
- 12 units = 37.6991 units
- 13 units = 40.8407 units
- 14 units = 43.9823 units
- 15 units = 47.1239 units
- 16 units = 50.2655 units
- 17 units = 53.4071 units
- 18 units = 56.5487 units
- 19 units = 59.6903 units
- 20 units = 62.8319 units
Reference Table
| Diameter | Circumference |
|---|---|
| 1 units | 3.1416 units |
| 2 units | 6.2832 units |
| 3 units | 9.4248 units |
| 4 units | 12.5664 units |
| 5 units | 15.708 units |
| 6 units | 18.8496 units |
| 7 units | 21.9911 units |
| 8 units | 25.1327 units |
| 9 units | 28.2743 units |
| 10 units | 31.4159 units |
| 11 units | 34.5575 units |
| 12 units | 37.6991 units |
| 13 units | 40.8407 units |
| 14 units | 43.9823 units |
| 15 units | 47.1239 units |
| 16 units | 50.2655 units |
| 17 units | 53.4071 units |
| 18 units | 56.5487 units |
| 19 units | 59.6903 units |
| 20 units | 62.8319 units |
Frequently Asked Questions
Frequently asked questions for Diameter to Circumference and its reference values.
What does the Diameter to Circumference calculator do?
It calculates converting measured diameters to perimeter length for circular parts and layouts from the values you enter.
What formula does the Diameter to Circumference calculator use?
Circumference = π × diameter.
What inputs are valid?
Enter a positive diameter greater than zero.
When would I use this?
converting measured diameters to perimeter length for circular parts and layouts
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.
Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.