# PrefixCalc — Metric‑prefix calculator

> Metric‑prefix calculator (iPhone/iPad app by YONAGARE LAB.)

- Source: https://appshunter.io/ios/app/prefixcalc/id6748650037 (this page in markdown: same URL + `.md`)
- Developer: [YONAGARE LAB](https://appshunter.io/developer/1810986554)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 28 MB
- Languages: American English
- Released: 2025-09-16
- Data updated: 2026-02-23
- User reviews in markdown: https://appshunter.io/ios/app/prefixcalc/id6748650037/reviews.md

## What is PrefixCalc?

This calculator supports Metric‑prefix such as kilo and giga.
The calculator supports quetta (10^30) and quecto (10^-30), which were added in 2022.

Main Functions
・Support for arithmetic operations (+ - ×÷)
・Results converted to Japanese numerals for display
・Delete one character at a time with the "DEL" button
　Press and hold to delete all
・Press and hold to copy calculation formulas and results
　English (Short scale, Long scale) and
　Chinese numerals can also be selected.
・Calculations that include prefixes such as 2M+1k, 2M×1μ, etc.

Note:
・Very large numbers that exceed 200 digits may be rounded off for display and calculation purposes.  
　Please note this when precision is required.
・Short scale and Long scale are currently supported up to 10^198.
・Kanji notation is supported up to 10^72.
　If it is greater than the number, it will be displayed in Arabic numerals.


## Version history (last 1 release)

### 1.0 — 2025-09-16

No release notes.

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All apps by YONAGARE LAB: https://appshunter.io/developer/1810986554

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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 2026-02-23.*