1 MB = 1024KB, or does it?

There are two possible definitions, which makes this quite confusing

  • 1,024,000 bytes: the “traditional” definition that was used, for instance, to describe the formatted capacity of floppy disks.
  • 1,000,000 bytes: the “standard” definition, recommended by the International System of Units (SI) and the IEC (International Electrotechnical Commission)

Convex uses the latter definition, where 1 MB equals 1000KB and also implements the corresponding unit (MiB) where 1 MiB equals 1024 KiB.

SI decimal prefix decimal prefix binary usage IEC binary prefix
Source: Wikipedia Megabyte article
megabyte (MB) 106 220 mebibyte (MiB)
gigabyte (GB) 109 230 gibibyte (GiB)
terabyte (TB) 1012 240 tebibyte (TiB)
petabyte (PB) 1015 250 pebibyte (PiB)
exabyte (EB) 1018 260 exbibyte (EiB)
zettabyte (ZB) 1021 270 zebibyte (ZiB)
yottabyte (YB) 1024 280 yobibyte (YiB)



Don’t remember the name of that currency?

Tap the first letters of the country and you’ll immediately get the currency you’re looking for! You can also type the country’s full name, the country code, the currency code or the currency’s name

Need a calculator?

Get in the text box and use Convex’s built-in calculator! All mathematical operations are in front of your eyes.

Selecting a conversion type

You can either pick the conversion type in the conversion wheel or go directly to a conversion type by typing its name in the text field

Can’t remember what that abbreviation stands for?

You’ve seen an abbreviation somewhere but you don’t know what it stands for. Convex can help you: just type it in the text box to find out!

Fast conversion for a given unit

Directly tap the name or the abbreviation of a unit (no need to specify a quantity) to get the default value and default conversion for that unit

Find out the currency for the country you’re currently in

Use the geolocalization button to find out the currency used in the place you are

Even faster conversions

Use the “to” button to type faster your conversion. Of course, you can type “to”, “in”, or “into”, your conversion will still work

More (or less) decimal places

Change the number of decimal places in the Preferences to get a more precise result. You can go up to 15!

Not sure about the spelling of a unit?

Try and enter the full name or an abbreviation of the unit. As Convex covers a wide range of orthographic variations, it’s hard to miss the unit you are looking for

Dollars, gallons…

If you are dealing with dollars, gallons and other units that may vary depending on the country you’re in, don’t worry. Convex is smart, so there is no need to specify if you are using a US or an imperial customary unit (unless you want to, of course). Convex figures out the “right” unit according to your regional settings


Square and cube

2-in-1! Push for some instants the square button (2) to change to the cube (3) button! Do the same thing to come back to square


can be written in letters or digits. Convex understands them both

Want to know what 1m 4 inches 3 yards amounts to in cm?

Convex lets you mix and match units as long as they belong to the same category

Reordering units

You can reorder the units appearing in the wheel through the Conversion types menu in the Preferences


Push the button “i” in the middle of the wheel to move to the Preferences


Get help on Convex options by taping on the question mark button

Find related units

Tap on a unit to display a selection screen for all the units of the current category

Converting between units

Choose the unit you want to convert from in the left column and pick the unit you want to convert to in the right column

Currencies and values

Convex enables you to enter currency unit first and value after, or the other way around