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Conversion calculators

Unit converters that show the full ladder of equivalents at once, not just the one pair you asked for.

Length & distanceMetric and imperial length, from millimetres to nautical miles.Weight & massGrams, kilograms, pounds, ounces, stone and tonnes.Volume & capacityLitres, millilitres, gallons, pints, cups and cubic units.AreaSquare metres, hectares, acres and square feet.SpeedKilometres per hour, miles per hour, metres per second, knots.TimeSeconds through to centuries.Digital storageBytes, kilobytes, mebibytes and the binary versus decimal split.PressurePascals, bar, psi, atmospheres and millimetres of mercury.EnergyJoules, calories, kilowatt-hours and BTU.PowerWatts, kilowatts, horsepower and BTU per hour.AngleDegrees, radians, gradians and turns.Cooking measuresCups, spoons, millilitres and fluid ounces for the kitchen.TemperatureCelsius, Fahrenheit, Kelvin and Rankine.Fuel economyLitres per 100 km, miles per gallon and km per litre.Height & weight (imperial ↔ metric)Feet-and-inches and stone-and-pounds, both ways.Hex to RGB Colour ConverterConverts a hex colour code to its RGB values, or RGB values to a hex code, both directions.Nm to ft-lbs ConverterConverts between newton-metres and foot-pounds of torque, both directions.Minutes in a YearHow many minutes are in a year, for a common, leap or average calendar year, or a number of years.Ha to Acres (Australia)Converts hectares to acres or acres to hectares, for sizing Australian rural and farm land.Tablespoons to Grams ConverterConverts tablespoons to grams or grams to tablespoons, for a chosen ingredient, both directions.Cup to mL ConverterConverts cups to millilitres or millilitres to cups, for a US, metric or UK/Imperial cup.Cubic Meter CalculatorVolume in cubic metres of a box, room or load from its length, width and height.Scale CalculatorConverts a real-world measurement to a scaled drawing or model size, or a scale value back to real life.Binary to Text ConverterConverts binary (8-bit groups) to readable text, or text to binary, in either direction.Seconds in a Year CalculatorHow many seconds are in a year, for a common, leap or average calendar year, or a number of years.Mbps download timeHow long a download or upload takes at a given Mbps speed, or the speed needed for a target time.mg to mL ConverterConverts milligrams to millilitres or millilitres to milligrams, for water or a chosen liquid density.Density unit converterConverts a density value between g/cm3, kg/m3, kg/L, g/mL, lb/ft3 and oz/in3.Minutes to Seconds ConverterConverts minutes to seconds or seconds to minutes, both directions.Days to Years CalculatorConverts days to years or years to days, both directions, using an average calendar year.Days to Months CalculatorConverts days to months or months to days, both directions, using an average calendar month.Months to Years CalculatorConverts months to years or years to months, both directions, using the exact 12 months in a calendar year.Kms to Miles CalculatorConverts kilometres to miles or miles to kilometres, both directions, using the exact 1.609344 factor.Fahrenheit to Celsius CalculatorConverts Fahrenheit to Celsius or Celsius to Fahrenheit, both directions, including common oven temperatures.Hours to Seconds ConverterConverts hours to seconds or seconds to hours, both directions, plus minutes.Gematria CalculatorConverts a word or phrase to its numeric value under English, Hebrew or Pythagorean gematria.Ounces to Grams ConverterConverts ounces to grams or grams to ounces, using the exact 28.3495 g factor.Light Year ConversionConverts light-years to kilometres, miles or astronomical units, both ways.Kg to Litres ConverterConverts kilograms to litres or litres to kilograms for a substance of a given density, since the two units are not directly equivalent.Zulu Time ConverterConverts a local clock time to Zulu (UTC) time from a UTC offset, with the date change flagged.m/s to km/h ConverterConverts metres per second to kilometres per hour or km/h to m/s, using the exact ×3.6 factor.Nm to M Converter (Length)Converts nanometres to metres or metres to nanometres, an exact base-10 length conversion.Milliseconds to Seconds ConverterConverts milliseconds to seconds or seconds to milliseconds, both directions.Ounces to mL ConverterConverts fluid ounces to millilitres or millilitres to fluid ounces, US or UK/Imperial.Teaspoon to mL ConverterConverts teaspoons to millilitres or millilitres to teaspoons, standard or US size.Minutes to Decimal CalculatorConverts minutes to a decimal fraction of an hour, or a decimal back to minutes.Fluid Ounces to Cups ConverterConverts fluid ounces to cups or cups to ounces, using the exact 8 fl oz = 1 cup ratio.Kilos to Stones CalculatorConverts kilograms to stones and pounds, or stones to kg, using the exact 6.35029 kg factor.Sqft to SqmConverts a known area between square feet and square metres, in either direction.Dozen ConverterConverts between dozens and individual items, using the fixed 1 dozen = 12 count.Million to Billion ConverterConverts between millions and billions, using the fixed factor of 1,000 million per billion.Cents to Dollars CalculatorConverts cents to dollars or dollars to cents using the fixed 100-cents-per-dollar relationship.Mbps to MB/sConverts network speed in megabits per second to megabytes per second, and back.Cubic Centimetres to MillilitresConverts cubic centimetres (cm3) to millilitres, using the exact 1:1 relationship between the two units.Billion to Trillion ConverterConverts between billions and trillions, using the fixed factor of 1,000 billion per trillion.Megabits to Megabytes CalculatorConverts a data amount between megabits (Mb) and megabytes (MB), the size of a file or download rather than a transfer speed.Time to Decimal CalculatorConverts a full time of hours, minutes and seconds into decimal hours, such as 2:15:00 into 2.25.Hex to Text ConverterConverts hexadecimal byte pairs to readable text, or text to hex, in either direction.Crore CalculatorConverts between the Indian numbering system (lakh, crore) and the Western system (million, billion).Weeks per Year CalculatorHow many weeks are in a year, or any chosen number of years, using both the rounded 52-week figure and the precise average.Watts to Kilowatts ConverterConverts watts to kilowatts or kilowatts to watts, using the exact ÷1,000 factor.PPM to mg/L ConverterConverts parts per million to milligrams per litre for dilute water-based solutions, where 1 ppm is approximately 1 mg/L.Kg to Newtons ConverterConverts a mass in kilograms to a weight force in newtons, or back, using gravitational acceleration.kPa to PSI Tyre Pressure ConverterConverts tyre pressure between kilopascals, PSI and bar, in either direction.Mm to Imperial ConversionConverts millimetres to inches, both as a decimal and as the nearest common fraction of an inch, for trade and engineering use.Seconds to Days ConverterConverts seconds to days, or days to seconds, using the fixed 86,400 seconds per day.Minutes to Days CalculatorConverts minutes to days, or days to minutes, using the fixed 1,440 minutes per day.mL to µL ConversionConverts millilitres to microlitres, or microlitres to millilitres, using the fixed 1,000 µL per mL, for lab and pipette work.Quart to Cups ConverterConverts US quarts to cups or cups to quarts, using the exact 1 quart = 4 cups ratio.Drops in mL ConversionConverts a volume in millilitres to a total drop count, or drops back to millilitres, using an editable drop factor.TorqueNewton-metres, foot-pounds, inch-pounds and kilogram-force metres.Paper quantitySheets, quires and reams, the units the printing and stationery trade uses.Concentration (ppm, ppb, %)Parts per million, parts per billion and percentage, as the same ratio expressed differently.12-hour ↔ 24-hour (military) timeClock time converted to 24-hour military format, and back.KSI to MPa ConverterConverts stress or pressure values between ksi and megapascals, in either direction.Microgram to milligram converterConverts microgram (mcg) amounts to milligrams, or milligrams to micrograms, both directions.Grams to MillilitresConverts grams to millilitres or millilitres to grams, using a density you set, not a fixed 1:1 factor.Baking Pan Size (Inches to cm) ConverterConverts a baking pan's length and width from inches to centimetres, with common pan sizes for quick reference.Weeks to Years ConverterConverts weeks to years or years to weeks, both directions, using the exact 365.25/7 average.PPM CalculatorConverts a percentage to parts per million, or ppm back to a percentage, using the fixed 1% = 10,000 ppm ratio.Astronomical distance (AU, light-year, parsec)Distances across the solar system and beyond: astronomical units, light-years and parsecs.Degrees, minutes, seconds ↔ decimal degreesConverts a geographic coordinate between decimal degrees and degrees-minutes-seconds format.Millilitres ↔ grams (kitchen liquids)Converts ml to grams or grams to ml for water, milk, honey and other common liquids.Hectares to AcresConverts between hectares and acres, both directions, using the exact 2.47105 factor.Inches to CmConverts between inches and centimetres, both directions, using the exact 2.54 cm factor.Grams in a TablespoonWeight in grams of a tablespoon of a common ingredient, such as butter, sugar or flour.Pounds to KilosConverts between pounds and kilograms, both directions, using the exact 0.453592 kg factor.Minutes to HoursConverts between minutes and hours, both directions, with the result also shown as hours and minutes.Knots to Km/hConverts between knots and kilometres per hour, both directions, using the exact 1.852 factor.Hours to DaysConverts between hours and days, both directions, including the remainder as hours.Weeks to MonthsConverts between weeks and months, both directions, using an average calendar month.mcg to mgConverts between micrograms and milligrams, both directions, using the exact 1000x factor.Tablespoon to mLConverts tablespoons to mL or mL to tablespoons, for US, UK/metric or Australian sizes.Hours to WeekConverts between hours and weeks, both directions, using the fixed 168 hours in a week.

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