# US Unit Converter — You can easily convert units!

> Converts US customary units to metric and vice versa for common measurements. (iPhone/iPad app by Kei Suefuji.)

- Source: https://appshunter.io/ios/app/us-unit-converter/id1577905442 (this page in markdown: same URL + `.md`)
- Developer: [Kei Suefuji](https://appshunter.io/developer/1388335881)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 107 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 14 MB
- Languages: Korean, German (Germany), Russian, Latin American Spanish, American English, Italian, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan), European Portuguese and 1 more
- Released: 2021-08-05
- Data updated: 2026-09-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews.md

## What is US Unit Converter?

"US Unit Converter" converts the units of length, weight, area, liquid volume, and temperature used in the United States into the International System of Units such as meters and kilograms.

Select the category of the unit you want to convert at the top of the screen, enter the value, and you can convert immediately.
The units that can be converted are as follows.

[Unit of length]
Meters [m], centimeters [cm], millimeters [mm], kilometers [km], inches [in], feet [ft], yards [yd], miles [mile]

[Unit of weight]
Kilogram [kg], gram [g], pound [lb], ounce [oz]

[Unit of area]
Square meters [m2], Are [a], hectares [ha], square kilometers [km2], square feet [ft2], square inches [in2], square miles [mi2], acres [acre], square yards [yd2]

[Unit of liquid volume]
Litre [L], milliliter [ml], fluid ounce [fl oz], cup [cup], pint [pt], quart [qt], gallon [gal]

[Temperature unit]
Celsius [℃], Fahrenheit [℉]

In the free version, you can see only the previous data in the conversion history.
If you want to see 100 historical data or hide ads, please consider purchasing the premium version in the app.

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Terms of Service and Privacy Policy: https://akikibai-labolatory.jimdofree.com/privacy-policy/

## Key features

- Length conversion
- Weight conversion
- Area conversion
- Liquid volume conversion
- Temperature conversion
- Conversion history
- Ad-free option

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| PREMIUM | $3.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews.md

### 3/5 — 入力している数字をワンタッチで消せるようにして欲しいです

*2024-09-21*

矢印ボタンのバグ対応ありがとうございます！とても使いやすくなりました。もう1点だけ、、入力している数字をワンタッチで消せるボタン、もしくは新たに入力しようとしたら自動的に前に入れていた数字が消える様になどできないでしょうか？
いちいち数字を消すところから始めるのが使いづらいです。
ご検討何卒よろしくお願いいたします！

### 2/5 — 上下切り替えが出来ない

*2024-06-03*

右側の循環の矢印は上下反転のボタンだと推測されますが、タッチしても上下交換とならず、無反応で、残念です。いちいち単位を変えてから行ってるので、数値は出てくるので実害はありませんが少々面倒臭いです。

### 5/5 — 리뷰

*2024-05-05*

미국칫수 변환사용이 너무 좋습니다.  
이 앱 꼭 사용하세요.

### 2/5 — 🔄

*2024-04-12*

🔄をタップしても反応しません
なので上下変換ができません

### 5/5 — 残念 →  良くなりました

*2024-04-07*

シンプルで使いやすいと思います。 ですが、センチ→インチの計算で、分数表示（アメリカの定規に良くある１６等分の表記まで）が出るとありがたいです。小数点以下を自分で近い分数になおすのが面倒です。 追記：確認いたしました。残念ながら希望のものではありませんでした。1インチを16等分にしたものを希望しておりました。例えば、２センチは25/32ではなく、13/16の様な表記だったらいちいち計算しなくても良いのになぁ。と思いました。 その方が普通の生活の中でのコンバーターとしては役に立つと思います。

まさか、アップデートしていただけるとは思ってもおりませんでした。
使い勝手が非常に良くなりました。
どうもありがとうございました。

**Developer response:** 追記でのご要望ありがとうございます。
分母を1/4, 1/8, 1/16, 1/32, 1/64から選択できるようにアップデートしました。
ぜひお時間がある時にお試しください。


2024/4/1回答
貴重なご意見、ありがとうございます。
今回のアップデートver2.0.0でインチの分数表記に対応しました。
お時間がある時にぜひお試しください。
またご要望等ございましたら遠慮なくお伝えください。

### 5/5 — 気温画面でマイナス入力できるようになった

*2024-01-26*

大変迅速な対応ありがとうございました。これで自分的には単位変換において非の打ち所がないアプリになりました。課金する価値の大きいアプリと思います！

**Developer response:** ご要望のありました気温の入力時にマイナスの気温を入力できるようにアップデートしました。お時間があるときに、ver1.5.0にアップデートしてお試しください！レビューありがとうございました。

### 4/5 — The most stylish unit conversion app

*2022-01-17*

I like the design of this app! Other unit conversion apps have outdated appearance.
If I can enter the value in both boxes, this will be perfect! I don’t want to change the unit of both boxes

## Frequently asked questions about US Unit Converter

### What units can US Unit Converter convert?

US Unit Converter can convert units of length (meters, kilometers, miles, feet, inches), weight (kilograms, grams, pounds, ounces), area (square meters, acres, square feet), liquid volume (liters, gallons, cups, fluid ounces), and temperature (Celsius, Fahrenheit).

### How does the free version of US Unit Converter differ from the premium version?

The free version of US Unit Converter allows you to view your previous conversion history. To access up to 100 historical data entries and remove advertisements, you can purchase the premium version within the app.

### What devices is US Unit Converter compatible with?

US Unit Converter is compatible with iPhone, iPad, and iPod devices, making it accessible across Apple's mobile ecosystem.

### How often is US Unit Converter updated?

The app was last updated to version 3.1.0 on January 2, 2026. While specific update frequency isn't detailed, this indicates ongoing development and support.

### What is the age rating for US Unit Converter?

US Unit Converter has an age rating of 4+, meaning it is suitable for users of all ages and does not contain mature content.

### Where can I find the Terms of Service and Privacy Policy for US Unit Converter?

The Terms of Service and Privacy Policy for US Unit Converter can be found at https://akikibai-labolatory.jimdofree.com/privacy-policy/.

### What do users like about US Unit Converter?

With a 4.8-star rating from 101 reviews, users generally appreciate the app's ease of use and accuracy in converting between US and metric units.

## Version history (last 5 releases)

### 3.1.0 — 2026-01-02

Minor improvements.

### 3.0.0 — 2024-08-18

In this update, the app has added a much-requested feature that allows you to swap the upper and lower units by tapping the arrow buttons.

### 2.2.0 — 2024-07-25

This update supports iOS 17.5.

### 2.1.0 — 2024-04-06

With this update, you can now choose to convert the denominator value of fractions in inches in increments of 1/4, 1/8, 1/16, 1/32, and 1/64.

### 2.0.0 — 2024-03-31

With this update, you can now input and display fractions when converting inches.

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## More apps by Kei Suefuji

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

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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 2026-09-03.*