# ArcCalc — Arc Calculator

> Calculates circular arc and segment dimensions given any two values. (iPhone/iPad app by Roseller Sunga.)

- Source: https://appshunter.io/ios/app/arccalc/id607185155 (this page in markdown: same URL + `.md`)
- Developer: [Roseller Sunga](https://appshunter.io/developer/607185158)
- Category: Productivity, Utilities
- Price: Free (on sale, was $0.99)
- Rating: 4.80/5 from 232 App Store ratings · 42 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 3 MB
- Languages: American English
- Released: 2013-03-05
- Data updated: 2026-09-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/arccalc/id607185155/reviews.md

## What is ArcCalc?

ArcCalc is a simple and easy to use app for calculating all the parts of a circular arc or segment. Given any two values, this app will calculate for the radius, length, width, height, apothem, angle, and area of a circular arc. Very useful for carpenters, architects, handymen, machinists, welders, designers, technicians, engineers, do it yourselfers, and many more. 

This calculator utilizes simple and complex mathematics to do all the calculating for you. If you are one of those who went to calculus class and wondered where all that knowledge can be practically applied -- this is one of them.

Features:

* This calculator will do calculations for all twenty one cases when given any two inputs of the radius, length, width, height, apothem, angle, and area of a circular arc. All possible solutions are presented for the given two inputs.

* Length units in feet, inch, meter, centimeter, millimeter can be  specified for all inputs and values to be calculated. Angle unit can be in degrees or radians. 

* All calculations are automatically saved in the "Saved Results" window. Saved results are grouped by date of entry. Just swipe to delete an entry no longer needed.

* Complete error checking function for inputs that are out of range in relation to the other given input. The calculator will give the limits for all inputs that are out of range.

* Results can be shared by email.

The Arc Calculator is the mobile app version of the popular online calculator "The Complete Circular Arc Calculator". Please check it out at https://www.handymath.com/cgi-bin/arc18.cgi?submit=Entry.

Please check out also other calculators you might need at www.handymath.com and on the App Store.

Additional Notes:

The circular segment screenshots above gives a visual illustration of the parts of a circular segment. "Width" is used in place of the more proper term "Chord" as more people go with "Width".

## Key features

- Calculates 21 cases for circular arcs
- Supports length units in feet, inches, meters, centimeters, millimeters
- Angle units in degrees or radians
- Automatic saving of results
- Error checking for out-of-range inputs
- Share results via email

## What do users think of ArcCalc?

Overall sentiment: positive

**Pros**

- 👍 Accurate calculations
- 👍 Very useful for work
- 👍 Great for curved surfaces
- 👍 Simple and quick
- 👍 Free to use
- 👍 Saves time
- 👍 User-friendly
- 👍 Handy for DIY
- 👍 Good for architects and designers
- 👍 Excellent support
- 👍 Flawless performance
- 👍 Saves previous results
- 👍 Helpful for CNC machines
- 👍 Clean and simple interface

**Cons**

- 🐛 Optimization needed for large screens
- 🐛 No metric units (initially)
- 🐛 Needs more unit choices
- 🐛 Incompatible with older iOS versions

**Commonly reported bugs**

- Not supported by iOS 11
- No longer works with iOS 11.0

**Most requested features**

- Include diagram from webpage in app
- More unit choices, especially for radius
- More calculator apps from developer in one app
- Ability to set default units

## Recent user reviews (10 of 42)

All indexed reviews: https://appshunter.io/ios/app/arccalc/id607185155/reviews.md

### 5/5 — Barry

*2026-04-07, version 1.4*

Good

### 5/5 — Wood worker

*2026-03-12, version 1.4*

Use it all the time to calculate curved box tops

### 5/5 — ArcCalc

*2026-02-25, version 1.4*

Great little app does just what it says it should

### 5/5 — Very useful

*2025-12-02, version 1.4*

Functions as expected and accurate

### 5/5 — Stairs

*2025-11-23, version 1.4*

Noori

### 5/5 — Best free radius calculator

*2025-04-15, version 1.4*

Great tool I use every day at work.

### 5/5 — Great solution

*2024-07-21, version 1.4*

Simple, quick, accurate and free. What more could a brother want?

### 5/5 — Great app

*2024-05-07, version 1.4*

I use it every day at work!

### 5/5 — Great

*2024-02-16, version 1.4*

Nice

### 5/5 — Ali

*2024-02-13, version 1.4*

Good

## Frequently asked questions about ArcCalc

### What does the ArcCalc app do?

ArcCalc is a mobile application designed to calculate all the parts of a circular arc or segment. You can input any two known values, and the app will compute the radius, length, width, height, apothem, angle, and area.

### What are the key features of ArcCalc?

Key features include the ability to calculate for all twenty-one possible cases given any two inputs, support for various length units (feet, inches, meters, centimeters, millimeters), angle units in degrees or radians, automatic saving of results, and error checking for invalid inputs.

### Is ArcCalc free to use?

Yes, ArcCalc is a free application. There are no costs associated with downloading or using its calculation features.

### What kind of users would find ArcCalc useful?

This app is very useful for a wide range of professionals and hobbyists, including carpenters, architects, handymen, machinists, welders, designers, technicians, engineers, and do-it-yourselfers who frequently work with circular measurements.

### Can I save and share my calculations?

Yes, all calculations are automatically saved in the 'Saved Results' window, grouped by date. You can also share your results via email directly from the app.

## Version history (last 4 releases)

### 1.4 — 2020-03-16

- Dark Mode display issue has been fixed
- More improvements to user interface
- Supports iOS 13

### 1.3 — 2019-12-16

- Updates and bug fixes to support iOS 13
- New improved user interface

### 1.2 — 2013-08-13

Bug fixes:
- No duplicate values in results

### 1.0 — 2013-03-05

No release notes.

## Apps similar to ArcCalc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [AngleCalculator](https://appshunter.io/ios/app/anglecalculator/id1116393725) | 4.6 (87) | Free | Productivity |
| [Lumber Board Foot Calculator](https://appshunter.io/ios/app/lumber-board-foot-calculator/id1619537641) | 3.8 (8) | Free | Productivity |
| [Smart Glazier Shower Measure](https://appshunter.io/ios/app/smart-glazier-shower-measure/id1475725835) | 4.3 (17) | Free | Productivity |
| [Machining Advisor Pro](https://appshunter.io/ios/app/machining-advisor-pro/id1321154225) | 4.0 (162) | Free | Productivity |
| [The Phillips Machinist](https://appshunter.io/ios/app/the-phillips-machinist/id1046408069) | 4.6 (394) | Free | Productivity |
| [CNC Machinist Calculator Ultra](https://appshunter.io/ios/app/cnc-machinist-calculator-ultra/id6474093839) | 4.9 (24) | Free | Productivity |

## Related topics

[circular sector](https://appshunter.io/ios/topics/circular-sector)

---

*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 2026-09-06.*