Semicircle Area from Radius

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 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. Reference values
  2. Calculator
  3. Reference table
  4. FAQs
  5. Methodology and review
  6. Related conversions

15 units =

353.429174 sq units

Representative value from the Semicircle Area from Radius reference table.

Reference Values

Browse 20 reference values with individual detail pages for quick lookup.

Browse all reference values

Semicircle Area from Radius

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

Calculated Result

Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Semicircle Area from Radius Reference
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

Common questions about Semicircle Area from Radius, formulas, and typical use cases.

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

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

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