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. This version is ad-supported.


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 6,400 units, this is the only unit converter you will ever need.


Streamlined Interface

• 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.


Advanced Features

• 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 12 significant digits.
• Automatic formatting of numbers based on your current Region Format.
• Automatic formatting of extremely large or small numbers with scientific notation.


Over 6,400 Units In 51 Categories.

• Acceleration
• Angle
• Area
• Blood Cholesterol
• Blood Glucose
• Capacitance
• Currency
• Currency / Volume
• Data
• Data Rate
• Density
• Dynamic Viscosity
• Electric Charge
• Electric Current
• Electric Potential
• Electrical Conductance
• Electrical Resistance
• Energy
• Force
• Frequency
• Fuel Economy
• Illuminance
• Inductance
• Kinematic Viscosity
• Length
• Luminance
• Magnetic Field Intensity
• Magnetic Flux
• Magnetic Flux Density
• Mass
• Mass / Area
• Mass Flow
• Mass Fraction
• Mass Moment of Inertia
• Mole Fraction
• Numeral Systems
• Pace (Speed)
• Power
• Pressure
• Radiation - Absorbed Dose
• Radiation - Equivalent Dose
• Radiation Rate - Equivalent Dose
• Radioactivity
• Sound
• Speed
• Temperature
• Time
• Torque
• Volume
• Volume / Area
• Volume Flow
• Volume Flow / Area
• Water Hardness
• Weight (Mass)
• Wire Gauge

URL Scheme: convertanyunitfree://

What’s New

Version 6.1.1

Minor bug fixes

- Fixed not being able to select favorite units while searching.
- Fixed possible incorrect result for conversions with mixed units when maximum decimal digits set to 0.
- Fixed the result showing in the wrong position for Arabic currencies.
- Fixed display issue for the division sign selection screen.

Ratings and Reviews

4.6 out of 5
5.4K Ratings

5.4K Ratings

raythejudge ,

They've got it nailed great App and service for free.

I've had 2 conversions which baffled me since using this app some 2yrs ago and both were answered in a very short time.
For those curious about my 2 conversions I needed help with.
1, was light bulb watts to lumens
2, was Horse height from age old 'Hands' too ft 'n' inches or metric, as in this instance 19hh and 18.5 try it and see the problem. Decimal (10) vs Imperial (ft:in")
The answer is easy once explained. Ray Bliss

datenga ,

Must have app

I use this all the time! Ads are annoying, so thinking of paying to not have them but as far as free apps go, this is awesome. From cooking conversions to currencies and everything in between. Yay!

notagamerbut.. ,

Deleted after years

Used to be good. Stuck to it for years. No ads when I first got it. Then just one short (few seconds) ad used to pop up upon first use which I didn’t mind too much. Now it’s got to the point where you can’t do anything there’s that many ads! Or you can but it’ll take you a couple of minutes before you convert what you need to. 2 stars only for giving me a few years service but your current app deserves 1 star. Deleted and swapped with “Units Plus” - only banner ads at the bottom, no interrupting pop up ads ;-)


Cider Software LLC
29.1 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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