Over 4 million downloads! The FASTEST way possible to convert units. Just type in a unit without first selecting the category. As you type, a list of units appear. Tap a unit to select it. For most units, 1 or 2 letters is enough to find the unit you want. Automatically saves units into a Favorites list.
As you type, the most likely units appear. Once you have selected a unit, the other unit is automatically restricted to the category of the current unit. At any time you can browse through the complete list of units available by tapping on the buttons to the right of the input fields. Advanced features include bookmarks and an integrated calculator. With over 6,000 units, this is the only unit converter you will ever need.
• Search for and select units with autocomplete (as you type, a list of matching units appears).
• Search faster by typing in only the unit abbreviation or first letter of each word in the unit.
• "Intelligent Search" shows the most likely units first.
• Automatic category selection (category is automatically set once you select a unit).
• Flip Units button to switch the From and To units.
• Reset button to clear all inputs and start over.
• Convert to fraction.
• Built in calculator.
• Save bookmarks and organize them into folders.
• Equations are shown for temperature conversions.
• Copy and paste to and from the clipboard.
• Conversion result is shown as an easy to understand equation.
• Both unit names and symbols shown.
• Browse units in an alphabetically indexed list or by magnitude.
• Results with up to 10 significant digits.
• Automatic formatting of numbers based on your current Region Format.
• Automatic formatting of extremely large or small numbers with scientific notation.
Over 6,000 Units In 48 Categories.
• Blood Cholesterol
• Blood Glucose
• Data Rate
• Dynamic Viscosity
• Electric Charge
• Electric Current
• Electric Potential
• Electrical Conductance
• Electrical Resistance
• Fuel Economy
• Kinematic Viscosity
• Magnetic Field Intensity
• Magnetic Flux
• Magnetic Flux Density
• Mass Flow
• Mass Fraction
• Mass Moment of Inertia
• Mole Fraction
• Numeral Systems
• Pace (Speed)
• Radiation - Absorbed Dose
• Radiation - Equivalent Dose
• Radiation Rate - Equivalent Dose
• Volume Flow
• Water Hardness
• Weight (Mass)
URL Scheme: convertanyunit://
- Added new Unit Category (Radiation Rate - Equivalent Dose)
- Added options for the E button (Hidden, EE, 00, and 000).
- UI improvements.
Ratings and Reviews
A personal favorite
I got the free version to use at work when needing to convert metric measurements to English and back again. I liked it so much, I upgraded to the paid version, which I like even more. It saves units I've used as favorites automatically. If I'm just trying to impress someone by showing them how many millimeters in a light year or how many teaspoons in a bushel, favorites are easy to edit. It's useful in unexpected ways, like converting units used on TV so I get what they are saying.
Edit: You can now round your answer to fractions, up to 1/64. There is a color palate if you want a different background. Adjustable font size in case you have vision issues. Plus a host of advanced options. For instance, if you are not American or just preferred British spellings, you can even switch to that. It's almost a shame I already rated this 5 stars, as I cannot give it a "raise."
Best Conversion App
Update to review below:
In my original review, I mentioned that the app did not support 64 bit number base conversions. Within several days of my review, the app was updated to provide 64 bit support. Not only is the app easy to use and accurate, the developer is very responsive to user requirements. I would give this app 6 stars if possible.
Previous review several days ago:
This app is the absolute best for unit conversions. It is intuitive and quite easy to use. Excellent user interface. I like the new number base conversions, but my only criticism is that is doesn’t handle more that 32 bits. Even the CPUs in modern iPhones are 64 bit. Please add this capability.
Please check out version 5.9. The Numeral Systems conversions have been updated to 64 bits.
Excellent conversation app
Excellent conversion app. I am a Physicist and this app has most units we use and more importantly actually has the conversions correct.
The ability to adjust the font size is GREAT and makes this app very usable and easy to read. I have used most other conversion apps but have found this one to be by far the best.
The one thing this app would benefit from is the addition of more units, especially the rare or outdated ones as they come up from time to time in my work.
With Family Sharing set up, up to six family members can use this app.