⚖️ Unit Conversion
Number bases and everyday unit conversion 46 free online tools, no sign-up.
- Base Converter (BigInt)Convert huge integers between bases 2-36
- Length ConverterMeters, kilometers, inches, feet, li and more
- Weight ConverterKilograms, pounds, ounces, jin and more
- Area ConverterSquare meters, hectares, mu and square feet
- Volume ConverterLiters, milliliters, cubic meters and gallons
- Temperature ConverterCelsius, Fahrenheit and Kelvin
- Pressure ConverterPascal, kilopascal, bar and atmospheres
- Data Size ConverterBits, bytes, KB, MB, GB and TB
- GPA CalculatorCompute your GPA from course grades
- Sunrise & SunsetSunrise and sunset times for any date and place
- Speed Converterm/s, km/h, mph and knots
- Angle ConverterDegrees, radians and gradians
- Energy ConverterJoules, calories and kilowatt-hours
- Power ConverterWatts, kilowatts and horsepower
- Roman Numeral ConverterConvert between Arabic numbers and Roman numerals
- Time Unit ConverterSeconds, minutes, hours, days, weeks and years
- Download Time CalculatorEstimate file download time from bandwidth
- Coordinate DistanceGreat-circle distance between two coordinates
- Coordinate Format ConverterConvert decimal degrees to and from DMS
- Percentage CalculatorRatios, growth rates and everyday percentage math
- Number FormatterThousands separators, percentages and scientific notation
- Ohms Law CalculatorEnter any two values to get voltage, current, resistance, power
- Battery Life EstimatorEstimate runtime from capacity and power draw
- Density Converterkg/m³, g/cm³ and pounds per cubic foot
- Force ConverterNewtons, kilogram-force, pound-force and dynes
- Torque ConverterN·m, kgf·m and lbf·ft
- Frequency ConverterHz, kHz, MHz and rpm
- Bandwidth ConverterConvert bits/s to KB/s and MB/s
- Fuel Consumption ConverterL/100km, mpg and km/L
- Illuminance ConverterLux and foot-candles
- Typography Converterpx, pt, em and inch for print and web
- Cooking ConverterCups, tablespoons, teaspoons and milliliters for baking
- Astronomical DistanceLight years, astronomical units and parsecs
- SI Prefix ConverterMega, kilo, milli, micro, nano and friends
- dBm to WattsConvert dBm to W and mW logarithmic power
- px to remConvert px, rem, em and percentages for CSS layout
- PPM Converterppm, ppb and percentage concentrations
- Ring Size ConverterCircumference to CN/US/EU ring sizes
- Flow Rate ConverterL/s, m³/h and gpm
- Acceleration Converterm/s², g and Gal
- Bitwise CalculatorAND, OR, XOR, shifts with binary and hex views
- Ones/Two ComplementShow sign-magnitude, ones and two complement in 8/16/32 bits
- PPI CalculatorPixel density, dot pitch and aspect ratio from resolution and size
- Current ConverterAmperes, milliamperes and CGS units
- Playback Speed CalculatorReal watch time and time saved at any speed
- Basic CalculatorFour-operation calculator with keyboard input and history
Browse all 1211 free online tools