Getting Started
System Requirements
- macOS 14.0 (Sonoma) or later
- 100% offline - no internet connection required
- No special permissions needed
Interface Overview
The app features a clean, intuitive layout designed for quick conversions:
Sidebar (Left)
Browse converters by category with expandable sections
Converter View (Right)
Input fields, unit selectors, and instant results
Search Bar
Quickly find any converter or unit by name
Favorites
Star your most-used converters for quick access
Converter Categories
65 converters organized into 8 logical categories:
Common
Everyday conversions you'll use most frequently.
Engineering
Mechanical and structural engineering units.
Heat
Thermodynamic and heat transfer units.
Fluids
Fluid dynamics and chemical engineering units.
Light
Luminance, Intensity, Illumination, Resolution, Frequency
Electricity
Charge, Current, Voltage, Resistance, Capacitance, Inductance
Magnetism
Magnetomotive Force, Field Strength, Flux, Flux Density
Radiology
Radiation Dose, Activity, Exposure, Equivalent Dose
How to Convert
Converting units is quick and intuitive:
Select a Converter
Browse categories in the sidebar or use search to find your converter
Choose Your Units
Select "From" and "To" units from the dropdown menus (searchable)
Enter Your Value
Type in either input field - the result updates instantly
Swap if Needed
Click the swap button to reverse the conversion direction
Dual Input Fields
You can type in either the "From" or "To" field - the other updates automatically. This makes reverse conversions just as easy as forward ones!
Special Converters
Some converters use specialized engines to handle non-linear or complex relationships:
Temperature Converter
Handles non-linear temperature conversions with formulas (not simple ratios).
Fuel Consumption Converter
Handles inverse relationships between efficiency (MPG) and consumption (L/100km) formats.
Data Storage Converter
Correctly distinguishes between SI decimal (base 1000) and IEC binary (base 1024) units.
SI Decimal (1000)
IEC Binary (1024)
Tips & Tricks
Use Keyboard Shortcuts
Press Cmd+F to focus the search bar from anywhere in the app.
Scientific Notation
Enter values like 1.5e6 for large numbers (1.5 million).
Star Your Favorites
Click the star icon to add frequently used converters to your Favorites section.
Searchable Dropdowns
Type in unit dropdowns to filter - great for converters with many units.
Frequently Asked Questions
KB (kilobyte) uses SI decimal where 1 KB = 1000 bytes. KiB (kibibyte) uses IEC binary where 1 KiB = 1024 bytes. This matters because hard drive manufacturers use SI units, while operating systems often use binary units, leading to the "missing space" confusion!
All conversion factors are based on official standards (NIST, SI, ISO). For most units, precision is maintained to 15+ significant digits using Swift's Double type. Results are formatted intelligently to show meaningful precision without unnecessary decimal places.
No! Another Unit Converter works 100% offline. All conversion data is bundled in the app. There's no cloud service, no analytics, and no data collection. Your conversions stay on your device.
Absolutely! We're always looking to expand our converter library. Use the contact form on our website to suggest new units or categories. We prioritize requests based on user demand and practical utility.
The US gallon is 3.785 liters while the UK (Imperial) gallon is 4.546 liters. This means the same car would show higher MPG in the UK! Our converter handles both correctly, so you can compare fuel economy across regions.