# RMS Calculator

> RMS Calculator (iPhone/iPad app by Kei Suefuji.)

- Source: https://appshunter.io/ios/app/rms-calculator/id1511092361 (this page in markdown: same URL + `.md`)
- Developer: [Kei Suefuji](https://appshunter.io/developer/1388335881)
- Category: Utilities, Productivity
- Price: $1.99
- Age rating: 4+
- Requires: iOS 12.0 · 8 MB
- Languages: American English, Canadian French, German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China), Latin American Spanish and 1 more
- Released: 2020-05-03
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/rms-calculator/id1511092361/reviews.md

## What is RMS Calculator?

How should the effective value be calculated? What is the amplitude of the effective value of 100V?
In such a case, do you have any experience of calculating the effective value while checking the calculation formula every time?

This app can quickly convert the effective value and amplitude of AC waveforms.

There are 4 types of conversion units: rms value, average value, amplitude, and Peak to Peak Amplitude.
By inputting the amplitude or effective value of the AC waveform and selecting the unit of the input value, the value converted into 4 types of units will be displayed.


## Version history (last 5 releases)

### 1.3.0 — 2026-01-19

Minor improvements.

### 1.2.0 — 2024-05-14

This update supports iOS17.

### 1.1.0 — 2021-03-31

Minor bug fixes

### 1.0.1 — 2020-07-05

Minor bug fixes

### 1.0.0 — 2020-05-03

No release notes.

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## More apps by Kei Suefuji

- [Rotational Speed Converter](https://appshunter.io/ios/app/rotational-speed-converter/id1388335882)
- [Hardness Unit Converter](https://appshunter.io/ios/app/hardness-unit-converter/id1409248484)
- [Force Unit Converter](https://appshunter.io/ios/app/force-unit-converter/id1415262579)
- [Motor Power Calculator](https://appshunter.io/ios/app/motor-power-calculator/id1429280610)
- [Torque Unit Converter](https://appshunter.io/ios/app/torque-unit-converter/id1434537031)
- [Color Scheme Designer](https://appshunter.io/ios/app/color-scheme-designer/id1435485163)

All apps by Kei Suefuji: https://appshunter.io/developer/1388335881

## Related topics

[current rms](https://appshunter.io/ios/topics/current-rms)

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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 2026-05-18.*