Mila's Tools: Unit Converter
300+ units across 29 categories - native unit conversion for macOS.
What’s New
Version 2.8.28 · 2026-06-19
• Added traditional Japanese shakkanhō units for length (rin, bu, sun, shaku, jō, ken) and area (tsubo), using Meiji-era metric-fixed values
• Ring Size now includes UK letter sizes (A–Z with half sizes) alongside US, EU, Swiss, and other standards
• New contact form in Settings → About pre-fills your app and device info so support requests get answered faster
Reviews from the App Store
Mila's Tools is a nice unit converter which offers a unique feature of being able to quickly select the to/from unit pair by selecting the whole unit family rather than individual pairs. This method is much faster than the usual method.
I'm teaching myself math, and when it came down to converting different units, this app is the best. You input a number in one measurement, and all the other like units show conversions. It's great for learning, and very convenient.
I've been using it for a while now, VERY helpful when a need for conversion arises, and VERY intuitive! The Developer has since come out with an iPhone version - and it's the same level of Goodness!
About Mila's Tools: Unit Converter
Spreadsheets and browser tabs are slow ways to convert units. Mila's Tools: Unit Converter is a native macOS app with 300+ units across 29 categories - length, weight, cooking, blood sugar, fuel economy, and more - in one window that converts as you type.
Built for Mac, not a web wrapper
This is the paid Mac edition of the Mila's Tools converter family. It runs as a desktop app with category-specific themes, dark mode, comfortable or compact layouts, and quick-copy values - the same precision workflow iPhone users know, tuned for a keyboard and trackpad.
29 conversion categories
- Cooking, length, weight, volume, temperature, area, and pressure
- Energy, speed, time, power, force, frequency, and torque
- Density, angle, fuel economy, flow rate, and capacitance
- Illuminance, bits & bytes, blood sugar, dates, and fractions
- Numbers, slope, shoe sizes, ring sizes, and data transfer rates
More than basic unit math
- Compound units - enter feet and inches, pounds and ounces, or gallons and quarts; values auto-normalize (type 13 inches, see 1 foot 1 inch)
- Date calculator - days, weeks, months, and years between dates; shortcuts like “90 days from today”
- Fractions and numbers - fractions to decimals and percentages; Roman numerals, binary, octal, and hexadecimal
- Historical units - ancient Egyptian, Mesopotamian, Greek, Roman, and Biblical length measures
- Favorites - star and reorder the categories and units you reach for daily
- Precision control - automatic smart formatting or manual decimal places from 0 to 10
Frequently asked questions
- How is the Mac app different from the free iOS version?
- Both share the Mila's Tools engine. The Mac edition is a one-time paid download optimized for desktop workflows - larger layouts, drag-and-drop favorites, and native macOS keyboard input.
- Does it work offline?
- Yes. Every conversion runs locally on your Mac with no internet required.
- Can I hide units I never use?
- Yes. Show or hide any unit in any category, and switch between comfortable and compact view styles.
- Does it support compound measurements?
- Yes. Enter mixed units like 5 feet 7 inches or 2 pounds 4 ounces - the app normalizes and converts all related units automatically.
- Is there a free Mac version?
- Unit Converter: Mila's Tools is free on iPhone, iPad, and Mac through a separate App Store listing. This paid Mac title targets users who want the full desktop experience as a standalone purchase.
Privacy
Mila's Tools: Unit Converter does not require an account. Conversion values are processed on your Mac and are not uploaded to third-party servers.