Unit Converter: Mila's Tools
29 categories, 300+ units - free on iPhone, iPad, and Mac.
What’s New
Version 2.8.29 · 2026-08-10
* Miles now live in the Imperial section with feet, inches, and yards, right where you'd expect them.
Reviews from the App Store
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.
This has a great interface; rather than scrolling to find the exact labels for conversion, you just go to the general category and fill in the value you know. All the other values convert immediately, including the one you are looking for.
I work in the construction industry and have used this to convert numbers a numerous time. 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.
About Unit Converter: Mila's Tools
Unit Converter: Mila's Tools (Apple Staff Pick, 4.8★ from 1,300+ reviews) packs 29 conversion categories and 300+ units into one free app for iPhone, iPad, and Mac. Convert length, weight, temperature, cooking measures, blood sugar, ring sizes, and more - without juggling separate single-purpose apps.
What you can convert
- Cooking, length, weight, volume, temperature, area, pressure, energy, speed, time - everyday units in one place
- Blood sugar - mg/dL and mmol/L for glucose tracking
- Ring and shoe sizes - US, EU, Swiss, Japanese, Chinese, and Hong Kong standards with diameter and circumference
- Dates and fractions - days between dates, calendar-system conversions, fraction/decimal/percentage, Roman numerals, binary, octal, and hex
- Historical units - ancient Egyptian, Mesopotamian, Greek, Roman, and Biblical lengths
- Japanese shakkanhō - traditional length units (rin, bu, sun, shaku, jō, ken) and area (tsubo), using Meiji-era metric-fixed values
- Compound units - feet + inches, pounds + ounces, gallons + quarts with auto-normalization
Built for precision
Choose automatic smart formatting or set decimal precision from 0 to 10 places. Locale-aware number formatting respects your region's separators. Purpose-built keyboards - numeric, whole number, Roman, binary, octal, and hexadecimal - keep autocorrect out of the way.
Designed for daily use
- Dark mode with category-specific color themes
- Comfortable or compact view styles
- Show or hide any unit in any category
- Date calculator with shortcuts like “90 Days from Today” and “End of Year”
- Date converter across 10 calendar systems plus Unix timestamps and ISO week dates
Frequently asked questions
- How many units does Mila's Tools include?
- More than 300 units across 29 categories - from kitchen cups to tire PSI, ring sizes, Japanese shakkanhō measures, and historical lengths.
- Is Unit Converter: Mila's Tools free?
- Yes. The full converter suite is free on iPhone, iPad, and Mac.
- Can I convert feet and inches together?
- Yes. Compound-unit mode handles real-world inputs like 13 inches and displays 1 foot 1 inch automatically.
- Does it work offline?
- Yes. Unit conversions run on your device - no network required for math between units.
- Can I hide units I never use?
- Yes. Toggle visibility for any unit in any category to keep your lists focused.
Privacy
Conversions happen on your device. Mila's Tools does not require an account to convert units.