Unit Converter

Unit Converter is a fast, clean and simple unit converter that works completely offline. Type a number and see the result instantly, with no Convert button, no sign-up and no internet connection needed. CONVERT 13 CATEGORIES OF UNITS • Length: metre, kilometre, centimetre, millimetre, inch, foot, yard, mile, nautical mile • Weight and mass: kilogram, gram, milligram, tonne, pound, ounce, stone • Temperature: Celsius, Fahrenheit and Kelvin, with correct formulas in both directions • Area: square metre, hectare, acre, square foot, square kilometre and more • Volume: litre, millilitre, cubic metre, US cup, US gallon, imperial gallon, fluid ounce • Speed: km/h, mph, m/s, knots • Time: seconds, minutes, hours, days, weeks, years • Data storage: bits, bytes, KB, MB, GB, TB, plus binary KiB, MiB, GiB and TiB • Pressure: pascal, bar, psi, atmosphere, mmHg, torr • Energy: joule, calorie, kilocalorie, watt-hour, kilowatt-hour, BTU • Power: watt, kilowatt, megawatt, horsepower • Frequency: hertz, kilohertz, megahertz, gigahertz, rpm • Angle: degree, radian, gradian, turn BUILT FOR SPEED AND ACCURACY • Instant results while you type • Swap units in one tap, with the result recalculated • Clear, large results that are easy to read • Decimal and binary data units are labelled, so GB and GiB are never confused • US and imperial units are labelled, so gallons are never confused • Invalid input is explained instead of showing a wrong answer SAVE TIME ON EVERYDAY CONVERSIONS • Favourites: save the unit pairs you use most, such as km to miles or kg to pounds • History: pick up recent conversions again with one tap • Search: find any category or unit by name or symbol • Quick conversions and quick values for repeated calculations • Copy any result to the clipboard with one tap MADE TO FIT YOU • Light, dark and system themes • Choose 2, 4, 6 or 8 decimal places • Optional thousands separators, trailing zeros and scientific notation • Number formats that follow your language and region • Works on phones and tablets, in portrait and landscape • Supports large text sizes and screen readers PRIVATE AND OFFLINE • No account or login • Conversions work without internet • Your favourites and history are stored only on your device • You can clear your history at any time Perfect for students, engineers, cooks, travellers, DIY projects, shopping abroad and anyone who needs a reliable metric and imperial converter.