All-in-One Converter

All-in-One Converter turns six families of units into one fast, private tool that keeps working with your phone in flight mode.

SIX CONVERTERS IN ONE APP
• Length — meter, kilometer, mile, foot, inch, centimeter, millimeter, yard
• Weight — kilogram, gram, pound, ounce, metric ton, milligram
• Temperature — Celsius, Fahrenheit, Kelvin
• Area — square meter, square kilometer, acre, hectare, square foot
• Time — second, minute, hour, day, week, month, year
• Digital storage — byte, KB, MB, GB, TB, PB

BUILT FOR ACCURACY
Every conversion runs on exact decimal arithmetic rather than floating point, so a petabyte stays 1,125,899,906,842,624 bytes and a marathon stays 42.164813 kilometers. Temperature uses the proper affine formulas, so 0°C correctly becomes 32°F instead of 0°F.

MADE TO BE QUICK
• Tap a category, type a number, read the result
• Swap the two units with a single tap
• See the same value in every other unit of the category at once
• Copy or share any result
• Pin the pairs you use most to Favorites
• Conversions are saved to a history grouped by day, with swipe to delete and undo
• A home screen widget puts your recent conversions one tap away

PRIVATE BY DESIGN
The app requests no permissions at all and makes no network calls. Your conversion history and favorites are stored only on your device. There is no account to create, no analytics, no advertising and no tracking of any kind.

YOURS TO ADJUST
Light, dark or system theme. Haptic feedback and motion effects can each be switched off. Choose how many decimal places results should show, anywhere from 0 to 10.

Works completely offline. No ads. No sign-up.