Semicircle Area from Radius Reference Values

Calculate semicircle area from radius using A = (1/2)πr².

Author

Dr. Elif Yilmaz

Math editorial contributor

Turkish computational biologist at the Max Planck Institute, mapping gene regulatory networks in rare diseases

Reviewed for accuracy by

Dr. Emeka Nwosu

Math content reviewer

Nigerian legal scholar with an SJD from Yale, focused on international trade law and African continental free trade agreements

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

Semicircle Area from Radius reference values
RadiusSemicircle Area
0.5 units0.392699 sq units
1 units1.570796 sq units
1.5 units3.534292 sq units
2.5 units9.817477 sq units
4 units25.132741 sq units
5 units39.269908 sq units
6 units56.548668 sq units
7.5 units88.357293 sq units
10 units157.079633 sq units
12.5 units245.436926 sq units
15 units353.429174 sq units
20 units628.318531 sq units
25 units981.747704 sq units
37.5 units2,208.932335 sq units
50 units3,926.990817 sq units
62.5 units6,135.923152 sq units
75 units8,835.729338 sq units
100 units15,707.963268 sq units
125 units24,543.692606 sq units
150 units35,342.917353 sq units

Frequently Asked Questions

Frequently asked questions for Semicircle Area from Radius and its reference values.

What does the Semicircle Area from Radius calculator do?

It helps with estimating half-circle area for arches, cutouts, and geometry problems.

What formula does the Semicircle Area from Radius calculator use?

Semicircle area = (1/2) × π × radius².

What inputs are valid?

Radius must be zero or greater. Physical values are typically positive.

When would I use this?

estimating half-circle area for arches, cutouts, and geometry problems

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.