Unit Converter: Mila's Tools
29 categories, 300+ units — free on iPhone, iPad, and Mac.
What’s New
Version 2.8.28 · 2026-06-23
• Blood Sugar now asks if you meant the alternate reading when you enter a value that looks unusual — so entering "5.5" the way it appears on your meter won't accidentally save as 550 mg/dL
• Convert traditional Japanese shakkanhō length units (rin, bu, sun, shaku, jō, ken) and area (tsubo) using Meiji-era metric-fixed values
• Added UK letter ring sizes (A–Z with half sizes) alongside US, EU, and Swiss standards
• Convert traditional Japanese shakkanhō length units (rin, bu, sun, shaku, jō, ken) and area (tsubo) using Meiji-era metric-fixed values
• Added UK letter ring sizes (A–Z with half sizes) alongside US, EU, and Swiss standards
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.