Circumference to Diameter Reference Values

Convert circumference to diameter using d = C / π.

Author

Prof. Ingrid Johansson

Math editorial contributor

Norwegian political scientist at the University of Oslo, studying democratic resilience in Nordic welfare states

Reviewed for accuracy by

Dr. Samuel Okafor

Math content reviewer

Nigerian-Canadian data scientist with a PhD from the University of Toronto, building ML models for early cancer detection

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Table of Contents

  1. All value pages
  2. Reference table
  3. FAQs
  4. Methodology and review
  5. Related conversions

Reference Value Index

This page lists 20 reference values for quick browsing and lookup.

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All Reference Values

Reference Table

Circumference to Diameter reference values
CircumferenceDiameter
3.1416 units1 units
6.2832 units2 units
9.4248 units3 units
12.5664 units4 units
15.708 units5 units
18.8496 units6 units
21.9911 units7 units
25.1327 units8 units
28.2743 units9 units
31.4159 units10 units
34.5575 units11 units
37.6991 units12 units
40.8407 units13 units
43.9823 units14 units
47.1239 units15 units
50.2655 units16 units
53.4071 units17 units
56.5487 units18 units
59.6903 units19 units
62.8319 units20 units

Frequently Asked Questions

Frequently asked questions for Circumference to Diameter and its reference values.

What does the Circumference to Diameter calculator do?

It calculates estimating circle diameter when only perimeter length is measured from the values you enter.

What formula does the Circumference to Diameter calculator use?

Diameter = Circumference / π.

What inputs are valid?

Enter a positive circumference greater than zero.

When would I use this?

estimating circle diameter when only perimeter length is measured

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.