29 converters in one free app — length, weight, volume, temperature, ring sizes, and more. Smart formatting, dark mode, effortless design.
Convert everything — 29 categories, 300+ units!
Mila's Tools Unit Converter puts 29 converters in your pocket at no cost. Whether you need to convert temperatures for a recipe, check tire pressure in PSI, find your ring size across international standards, or calculate the days until a deadline, this app handles it all with precision and ease.
What customers are saying:
***** "Get it! Nothing better than this!"
***** "This is the best quick ref tool I have come across to date"
***** "Undoubtedly the best conversion app in the App Store."
***** "Best app for me so far."
***** "Intuitive interface. The app design is so easy you'll actually use it."
29 CONVERSION CATEGORIES
Cooking · Length · Weight · Volume · Temperature · Area · Pressure · Energy · Speed · Time · Power · Force · Torque · Density · Angle · Fuel Economy · Flow Rate · Capacitance · Illuminance · Bits & Bytes · Blood Sugar · Dates · Fractions · Numbers · Slope · Shoes · Ring Sizes · Data Transfer Rates · Frequency
COMPOUND UNITS
Work with real-world measurements like feet + inches, pounds + ounces, or gallons + quarts. Values auto-normalize — type 13 inches and see 1 foot 1 inch instantly.
DATE CALCULATOR
Find the exact number of days, weeks, months, and years between any two dates. Add or subtract time from a date with quick-action shortcuts like "90 Days from Today" or "End of Year."
DATE CONVERTER
See any date across 10 calendar systems — Gregorian, Islamic, Hebrew, Chinese, Persian, Indian National, Coptic, Ethiopic, Buddhist, and Japanese — plus Unix timestamps, Julian Day numbers, and ISO 8601 week dates. Tap the info icon for details on each calendar system.
FRACTIONS & NUMBERS
Convert between fractions, decimals, and percentages. Translate numbers into Roman numerals, binary, octal, and hexadecimal. Explore magnitudes from thousands to decillions.
RING SIZES
Convert between US, EU, Swiss, Japanese, Chinese (Mainland), and Hong Kong ring sizing standards. View inner diameter and circumference in millimeters for precise measurements.
HISTORICAL UNITS
Go beyond modern measurements with ancient Egyptian, Mesopotamian, Greek, Roman, and Biblical units of length.
BUILT FOR PRECISION
Choose automatic smart formatting or set manual decimal precision from 0 to 10 places. Locale-aware number formatting respects your region's separators and conventions.
SMART CUSTOM KEYBOARDS
Purpose-built keyboards for every input type — numeric, whole number, Roman numeral, binary, octal, and hexadecimal — so you never have to fight autocorrect.
DESIGNED FOR YOU
• Dark mode with rich, category-specific color themes
• Comfortable or compact view styles
• Show or hide any unit in any category
• Available on iPhone, iPad, and Mac
Download now and experience the most comprehensive unit conversion app available!
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Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
I love this app because it is very simple and user friendly. I downloaded long time ago on one of first iPhones I owned and I have made sure to carry it on every phone afterwards. When you are crunching numbers together from Imperial to Metric, or vice versa, it will do all the math for you. This is great for home, office, or field work. I use it at home as much as at work at times. I work in the construction industry and have used this to convert numbers a numerous time. No matter if you’re at home or any occupation, I highly recommend everyone to download this. It’s also great for changing times like now, where units are now being used in unfamiliar areas around the globe.
The BEST!!!
DrGGM3
I’ve been using this app for YEARS and I continue to love it! It’s super convenient and so fast. The categories for conversions are intuitively broken down and by entering just one value, you get every single conversion automatically done in that category. It’s truly the best conversion app out there that I’ve ever used. I’ve never had an issue with bugs, crashes or delays. Whether you need to do conversions daily or occasionally, this app is the way to go.
Great app
<RAB>
I found this app recently when my old conversion app became too cumbersome to use. This has a great interface; rather than scrolling to find the exact labels for conversion (grams and ounces, for instance), you just go to the general category, e.g weight, and fill in the value you know. All the other values convert immediately, including the one you are looking for. It is so much easier than any other method. It has a wide range of categories, so I'm never at a loss. I've dumped my other conversion apps.
Excellent
Mike9365
I’ve used Mila’s Tools for a very long time. For many years, it was one of my “most used” apps and a favorite. I gave high marks. Then, it stopped scrolling for some reason and nothing would fix it, even completely removing and installing. The newer versions, however, have corrected whatever the problem was and have so many different conversions it’s the greatest app out there for any type of mathematical conversion.
Developer Response
Thank so much, Mike! I so love hearing from long time users. Glad you're enjoying the new version! ♥️🫵🏼
• New EV units: kWh/mi, kWh/km, and KPGe now available in the Electric section (Thanks again Joey!)
• Fuel & EV reorganized — Electric (Miles) and Electric (Kilometers) split so you only see relevant units for your system
Version 2.8.2
The developer, Scott DeSapio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Location
Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
Location
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Larger Text
Dark Interface
Differentiate Without Color Alone
Information
Seller
Scott DeSapio
Size
9.2 MB
Category
Utilities
Compatibility
Requires iOS 17.6 or later.
iPhone Requires iOS 17.6 or later.
iPad Requires iPadOS 17.6 or later.
Mac Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.