# Circle & Diameter Calculator — Radius, Area & Circumference

> Instant calculator for circle diameter, radius, circumference, and area. (iPhone/iPad app by Krzysztof Gwiazda.)

- Source: https://appshunter.io/ios/app/circle-and-diameter-calculator/id6463205574 (this page in markdown: same URL + `.md`)
- Developer: [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15 · 10 MB
- Languages: American English
- Released: 2023-08-24
- Data updated: 2026-11-12
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/circle-and-diameter-calculator/id6463205574/reviews.md

## What is Circle & Diameter Calculator?

# Circle Calculator: Diameter

Calculate circle diameter, radius, circumference, and area instantly with a simple, accurate, and easy-to-use circle calculator.

Whether you're working on geometry problems, studying mathematics, measuring circular objects, or performing everyday calculations, Circle Calculator: Diameter makes finding circle measurements quick and convenient.

**ALL CIRCLE CALCULATIONS IN ONE APP**

Enter any known circle measurement and instantly calculate the remaining values:

- **Radius** – Calculate the radius of a circle from its diameter, circumference, or area.
- **Diameter** – Find the diameter using the radius, circumference, or area.
- **Circumference** – Calculate the distance around a circle using any known measurement.
- **Area** – Find the area of a circle from its radius, diameter, or circumference.

**KEY FEATURES**

- Instant calculations between radius, diameter, circumference, and area.
- Four interactive input fields with automatic result updates.
- Enter any known value to calculate the other three measurements.
- Accurate circle geometry formulas using Pi (π).
- Support for decimal numbers and precise calculations.
- International decimal input support, including periods, commas, and Arabic decimal separators.
- Automatic number formatting based on your device's regional settings.
- Simple, intuitive interface with clearly displayed results.
- No complicated menus or unnecessary steps.

**PERFECT FOR EVERYDAY CALCULATIONS**

Circle Calculator: Diameter is a practical tool for:

- Students learning circle geometry and mathematics.
- Teachers explaining radius, diameter, area, and circumference.
- DIY projects involving circular measurements.
- Engineering and technical calculations.
- Construction, design, and craft projects.
- Anyone who needs a quick circle measurement calculator.

**SIMPLE AND FAST**

No need to remember multiple circle formulas or perform calculations manually.

Enter a radius, diameter, circumference, or area, and the calculator automatically updates the remaining three values.

Switch between measurements, compare results, and solve circle geometry problems in seconds.

**YOUR EVERYDAY CIRCLE GEOMETRY TOOL**

From basic math exercises to practical measurements, Circle Calculator: Diameter brings essential circle calculations together in one convenient app.

Calculate radius, diameter, circumference, and area anytime with a fast and straightforward calculator.

## Key features

- Calculate radius, diameter, circumference, and area
- Instant calculations with automatic result updates
- Input any known value to find others
- Accurate geometry formulas using Pi
- Support for decimal numbers and international input
- Simple and intuitive interface

## Is Circle & Diameter Calculator safe?

Not enough ratings yet to assess Circle & Diameter Calculator.

## Is Circle & Diameter Calculator legit?

Circle & Diameter Calculator appears to be a legitimate app. The AppsHunter Legitimacy Score for Circle & Diameter Calculator is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/circle-and-diameter-calculator/id6463205574/reviews.md

### 5/5 — Does what I need

*2025-10-28*

Simple to use and it works

## Frequently asked questions about Circle & Diameter Calculator

### What can Circle & Diameter Calculator calculate?

Circle & Diameter Calculator can instantly compute the radius, diameter, circumference, and area of a circle. You can input any one of these values, and the app will automatically calculate the other three.

### Is Circle & Diameter Calculator free to use?

Yes, Circle & Diameter Calculator is completely free to download and use. It does not require any purchases or subscriptions.

### Does Circle & Diameter Calculator have ads?

No, Circle & Diameter Calculator is ad-free. You can perform your calculations without any interruptions from advertisements.

### What devices is Circle & Diameter Calculator available on?

Circle & Diameter Calculator is available for iPhone, iPad, and iPod. It is designed to work across these Apple devices.

### How accurate are the calculations in Circle & Diameter Calculator?

The app uses accurate circle geometry formulas, including Pi (π), to ensure precise calculations. It supports decimal numbers for detailed measurements.

### Can I use different decimal separators in Circle & Diameter Calculator?

Yes, Circle & Diameter Calculator supports international decimal input, including periods, commas, and Arabic decimal separators. It also formats numbers based on your device's regional settings.

### How often is Circle & Diameter Calculator updated?

The app was last updated on November 10, 2026, with version 2.0. While this indicates a recent update, future update frequency is not specified.

### What is the age rating for Circle & Diameter Calculator?

Circle & Diameter Calculator has an age rating of 4+. This means it is suitable for children aged 4 and above, making it accessible for students learning geometry.

## Version history (last 3 releases)

### 2.0 — 2026-11-10

We've updated Circle Calculator: Diameter to deliver a faster, smoother, and more reliable experience.

• Updated Google AdMob and Firebase integration.
• Improved app performance and overall stability.
• Enhanced decimal input with support for periods, commas, and Arabic decimal separators.
• Improved international number formatting based on device language and regional settings.
• Enhanced compatibility with Arabic numerals.
• Improved calculation reliability and precision.
• Updated compatibility with the latest iOS versions.
• General bug fixes and optimizations.

Thank you for using Circle Calculator: Diameter!

### 1.0.1 — 2024-01-10

EU GDPR consent form

### 1.0 — 2023-08-24

No release notes.

## Apps similar to Circle & Diameter Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Arc+](https://appshunter.io/ios/app/arc-plus/id1464058503) | 4.6 (119) | Free | Utilities |
| [Geometry Calculator - Triangle](https://appshunter.io/ios/app/geometry-calculator-triangle/id6448397954) | 5.0 (8) | Free | Utilities |
| [Geometry Calculator Pro](https://appshunter.io/ios/app/geometry-calculator-pro/id6446316920) | — | Free | Utilities |
| [Square Footage Calculator +](https://appshunter.io/ios/app/square-footage-calculator-plus/id1493893224) | 4.5 (294) | Free | Utilities |
| [Tank Volume Calculator App](https://appshunter.io/ios/app/tank-volume-calculator-app/id6475638941) | 1.0 (1) | Free | Utilities |
| [Sheet Metal Calculator Pro](https://appshunter.io/ios/app/sheet-metal-calculator-pro/id6753674123) | 4.1 (10) | Free | Utilities |

## More apps by Krzysztof Gwiazda

- [Blood Test Results: Lab Values](https://appshunter.io/ios/app/blood-test-results-lab-values/id1546740381)
- [Weight & Mass Unit Converter](https://appshunter.io/ios/app/weight-and-mass-unit-converter/id1554478851)
- [Blood Sugar Unit Converter](https://appshunter.io/ios/app/blood-sugar-unit-converter/id1556071095)
- [Unit Converter For Medics](https://appshunter.io/ios/app/unit-converter-for-medics/id1634088201)
- [Hand Bones Anatomy Quiz](https://appshunter.io/ios/app/hand-bones-anatomy-quiz/id1636013182)
- [Foot Bones Anatomy Quiz](https://appshunter.io/ios/app/foot-bones-anatomy-quiz/id1638990186)

All apps by Krzysztof Gwiazda: https://appshunter.io/developer/1546740383

## Related topics

[find circumference of a circle](https://appshunter.io/ios/topics/find-circumference-of-a-circle) · [circumference](https://appshunter.io/ios/topics/circumference) · [diameter](https://appshunter.io/ios/topics/diameter) · [radius calculator](https://appshunter.io/ios/topics/radius-calculator) · [circle math](https://appshunter.io/ios/topics/circle-math)

---

*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 2026-11-12.*