# Circular Segment Calculator — Chord, Arc & Angle Solver

> Calculates circular segment properties from two input values. (iPhone/iPad app by Heng Jia Liang.)

- Source: https://appshunter.io/ios/app/circular-segment-calculator/id1628037532 (this page in markdown: same URL + `.md`)
- Developer: [Heng Jia Liang](https://appshunter.io/developer/1532000635)
- Category: Education, Utilities
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 1 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2022-06-06
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/circular-segment-calculator/id1628037532/reviews.md

## What is Circular Segment Calculator?

Circular Segment Calculator is the fastest way to solve any circular segment - enter just two values and instantly get all six properties: radius, central angle, arc length, chord length, segment height, and area.
Whether you're a student, engineer, architect, woodworker, or CNC machinist, this calculator handles the geometry so you don't have to.

TWO FLEXIBLE INPUT MODES
Angle & Radius - Know the circle's radius and the central angle? Every other property is solved instantly.
Chord & Height - Working from a physical measurement? Enter the chord length and segment height (sagitta) to back-calculate the radius, angle, and everything else.

WHAT YOU GET
Arc length - exact curved distance along the segment
Chord length - straight-line distance between the two endpoints
Segment height - the sagitta, from chord midpoint to arc
Central angle - in degrees or radians, your choice
Radius - recovered from any two known values
Segment area - precise enclosed area calculation


BUILT FOR REAL WORK
• Real-time results — calculations update as you type, no submit button needed
• Step-by-step explanations — every formula shown with your actual numbers
• Tap to copy — tap any result row to copy the value instantly to clipboard
• Unit flexibility — switch between cm, m, inches, and feet; degrees or radians
• Visual diagram — live canvas updates as you enter values, labeled with r, θ, c, h, and L
• Reference sheet — full formula reference with annotated diagram, always one tap away
• Dark Mode — full system dark and light mode support

WHO USES THIS
Students working through geometry, trigonometry, or engineering coursework
Engineers & architects calculating curved structural elements, arches, and vaults
Woodworkers & makers laying out curved cuts, jigs, and templates
CNC & CAM operators computing toolpaths for circular profiles
Surveyors working with circular curves and road alignment
Anyone who needs quick, reliable circular segment math on the go

Circular segment - is an area of a circle which is "cut off" from the rest of the circle by a secant (chord).

A circular sector or circle sector, is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. In the diagram, θ is the central angle in radians, r the radius of the circle, and L is the arc length of the minor sector.

A sector with the central angle of 180° is called a half-disk and is bounded by a diameter and a semicircle. Sectors with other central angles are sometimes given special names, these include quadrants (90°), sextants (60°) and octants (45°), which come from the sector being one 4th or 6th or 8th part of a full circle, respectively.

The angle formed by connecting the endpoints of the arc to any point on the circumference that is not in the sector is equal to half the central angle.

PRIVACY
No account required. No ads. No tracking. All calculations run entirely on your device.

Download Circular Segment Calculator and solve segment geometry in seconds.

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

## Key features

- Calculate radius, angle, arc length, chord length, height, and area
- Two input modes: Angle & Radius or Chord & Height
- Real-time results update as you type
- Step-by-step formula explanations
- Tap to copy results
- Supports multiple units and dark mode

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/circular-segment-calculator/id1628037532/reviews.md

### 1/5 — Could be better

*2025-08-20*

Not enough variable choices.

### 1/5 — Other fields

*2022-10-24*

It would be better if you could fill other fields like arc length and radius to auto fill the other fields

## Frequently asked questions about Circular Segment Calculator

### What is the price of Circular Segment Calculator?

Circular Segment Calculator is a paid app priced at $2.99. This one-time purchase grants you full access to all its features without any recurring fees.

### Does Circular Segment Calculator have ads?

No, Circular Segment Calculator is ad-free. The developer explicitly states 'No ads. No tracking.' ensuring an uninterrupted user experience.

### What devices does Circular Segment Calculator support?

Circular Segment Calculator is available for iPhone and iPad devices. It is designed to run on Apple's mobile operating systems.

### How often is Circular Segment Calculator updated?

The latest version of Circular Segment Calculator is 1.5, last updated on March 21, 2026. This indicates a recent update, suggesting ongoing support and development.

### What is the age rating for Circular Segment Calculator?

Circular Segment Calculator has an age rating of 4+. This means it is suitable for children aged 4 and older, with no mature content.

### How does Circular Segment Calculator help with learning?

Circular Segment Calculator provides step-by-step explanations for every formula used in its calculations. This feature is invaluable for students learning geometry and trigonometry, allowing them to understand the underlying math.

### Can I track my progress with Circular Segment Calculator?

While Circular Segment Calculator provides detailed calculations and formula explanations, it does not include explicit progress tracking features for educational courses. Its focus is on providing accurate and immediate geometric solutions.

### Does Circular Segment Calculator offer certifications?

Circular Segment Calculator does not offer certifications. It is a tool designed to assist with calculations for educational and professional purposes, rather than a formal learning platform.

## Version history (last 3 releases)

### 1.5 — 2026-03-21

- Optimized for the latest devices.
- Fixed minor bugs.
- Improved and redesigned the UI.

### 1.1 — 2026-01-15

- Updated for the newest devices.
- Minor bugs fixed.

### 1.0 — 2022-06-06

No release notes.

## More apps by Heng Jia Liang

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All apps by Heng Jia Liang: https://appshunter.io/developer/1532000635

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*