Online Converters
Length Converter: Meters, Feet, Inches, Miles
Length converter: mm, cm, m, km, inches, feet, yards, miles and nautical miles. Exact conversion with a solution and a table of all units.
Time Converter: Seconds, Minutes, Hours, Days
Time converter: seconds, minutes, hours, days, weeks, months, years and milliseconds, with a solution and a split into h, min, s.
Volume Converter: Liters, Gallons, Cubic Meters
Volume converter: mL, cm³, liters, m³, US and imperial gallons, pints, quarts, fluid ounces, barrels and cubic feet.
Area Converter: Square Meters, Square Feet, Acres, Hectares
Area converter: mm², cm², m², km², ares, hectares, acres, square feet and square miles. Conversion with a solution.
Mass Converter: Kilograms, Pounds, Ounces, Tons
Mass and weight converter: mg, g, kg, tonnes, carats, ounces, pounds, stones and tons. Exact conversion with a solution.
Speed Converter: km/h, m/s, mph, Knots
Speed converter: km/h to m/s and back, mph, knots, feet per second and the speed of light, with a solution.
Map Scale Calculator: Map and Real Distance
Map scale calculator: real distance from the map, map distance from the real one, and the scale from two distances.
Temperature Converter: Celsius, Fahrenheit, Kelvin
Temperature converter: Celsius, Fahrenheit, Kelvin, Rankine and Réaumur. Conversion formulas with the numbers substituted.
Cartesian and Polar Converter: Points and Equations
Convert points and equations between Cartesian and polar coordinates with a solution. Circles, lines and other curves.
Julian to Gregorian Converter: Old and New Style Dates
Convert dates between the Julian and Gregorian calendars: Old Style and New Style with a solution and the day of the week.
Text to Binary Converter: ASCII, Unicode, UTF-8, Windows-1251
Convert text to binary, decimal and hexadecimal codes and back: ASCII, Unicode, UTF-8 and Windows-1251.
Year to Century Converter with Roman Numerals
Finds the century from a year and the years of a century, and writes the century in Roman numerals. The year 1812 is in the 19th century.
Unix Timestamp Converter: Timestamp to Date and Back
Converts a Unix timestamp to date and time (UTC and Moscow) and a date to a timestamp. Seconds and milliseconds.
Scientific Notation Converter: a · 10ⁿ and Back
Convert a number to scientific notation and back: 0.00052 = 5.2 · 10⁻⁴. Step-by-step solution.
Wavelength and Frequency Converter: nm, m, Hz, eV
Wavelength and frequency converter: nanometers, meters, hertz and photon energy. Conversion with a solution and a table.
Angle Converter: Degrees, Radians, Arcminutes, Gradians
Angle converter: degrees, arcminutes, arcseconds, radians, gradians and turns. Conversion with a solution and a table.
Fuel Consumption Converter: L/100 km, km/L, mpg
Fuel consumption converter: L/100 km, km/L and miles per gallon (US and UK). Conversion with a solution and a table.
Morse Code Converter: Text to Morse and Back
Convert text to Morse code and back: Latin and Russian letters, digits and symbols with a code table.
Solution Concentration Converter: Mass Fraction, Molarity, g/L
Concentration converter: mass fraction, molarity and g/L, taking solution density into account. Step-by-step solution.
Cooking Measures Converter: Cups, Spoons, Grams, mL
How many grams are in a cup or a spoon: flour, sugar, salt, grains, oil and more. Conversion with a solution.
Electrical Units Converter: Amperes, Volts, Ohms, Farads
Electrical units converter: current, voltage, resistance and capacitance. Convert mA, kV, kΩ and µF with a solution.
Percent, Per Mille and Fractions Converter
Parts converter: decimal and common fractions, percentages, per mille and ppm. Conversion with a solution and a table.
Frequency and Period Converter: Hz, rpm, Seconds
Frequency and period converter: Hz, kHz, MHz, rpm, rad/s and period in seconds. Conversion with a solution and a table.
Old Russian Units Converter: Arshin, Sazhen, Versta, Pud
Old Russian units converter: vershok, arshin, sazhen, versta, zolotnik, pud, vedro and desyatina. Conversion with a solution.
Clothing and Shoe Size Converter: RU, EU, US, UK
Convert clothing and shoe sizes between the Russian, European, US and UK systems. Size charts included.
Screen Size Converter: Diagonal, Width and Height
Converts a screen diagonal between inches and centimeters and finds the width and height from the aspect ratio.
Pressure Converter: Pa, kPa, atm, bar, mmHg
Pressure converter: pascals, kPa, MPa, bars, atmospheres, mmHg. Exact conversion with a solution and a table.
Energy Converter: Joules, Calories, kWh, eV
Energy converter: J, kJ, calories, kilocalories, kWh and electronvolts. Conversion with a solution and a table.
Force Converter: Newtons, kgf, Dynes, lbf
Force converter: N, kN, MN, dynes, kgf and pound-force. Exact conversion with a solution and a table.
Power Converter: Watts, Kilowatts, Horsepower
Power converter: W, kW, MW and horsepower. Conversion with a solution and a table.
Density Converter: kg/m³, g/cm³, g/L
Density converter: kg/m³, g/cm³, g/L, g/mL and t/m³. Exact conversion with a solution and a table.
Acceleration Converter: m/s², cm/s², g
Acceleration converter: m/s², cm/s², km/h per second and g. Exact conversion with a solution and a table.
SI Prefix Converter: Nano, Micro, Milli, Kilo, Mega
SI prefix converter from yocto to yotta. Convert between nano-, micro-, milli-, kilo- and mega- with a solution and a table.
Radiation Units Converter: Bq, Ci, Gy, Sv, R
Radiation units converter: becquerels, curies, grays, rads, sieverts, rems and roentgens. Conversion with a solution.
Data Rate Converter: bit/s, Kbit/s, Mbit/s, MB/s
Data rate converter: bit/s, Kbit/s, Mbit/s, Gbit/s and MB/s. Conversion with a solution and a table.
Data Units Converter: Bits, Bytes, KB, MB, GB, TB
Data units converter: bits, bytes, KB, MB, GB, TB, KiB and MiB. Conversion with a solution and a table.
Text Case Converter: Upper, Lower, Title, Sentence Case
Changes text case: UPPER CASE, lower case, Sentence case, Title Case and inverted case.
Magnetic Units Converter: Flux Density, Flux, Inductance
Flux density, field strength, magnetomotive force, magnetic flux and inductance.
Light Units Converter: Intensity, Illuminance, Exitance
Luminous intensity, illuminance, exitance, luminous flux and luminous energy.
Flow Rate Converter: Volumetric and Mass Flow
Units of volumetric and mass flow of liquids and gases.
Viscosity Converter: Kinematic and Dynamic
Units of kinematic and dynamic viscosity: stokes, centistokes, poise.
Torque Converter: N·m, kgf·m, lbf·ft
Units of torque in the metric and imperial systems.
Wind Force Converter: Speed and Beaufort Scale
Convert wind speed to the Beaufort scale and back.
Bra Size Calculator and Converter: RU, EU, US, UK
A bra size from measurements and a conversion between RU, EU, US, UK, FR and IT.
Convert number from any base to any base online
The calculator converts numbers and shows the solution. Converting numbers between number systems. Detailed answer with solution.
Mbit to MB Converter: Data Units and Download Time Calculator
Data unit converter: bits, bytes, kB, MB, GB, TB, megabits and gigabits, decimal and binary (KiB, MiB, GiB). File download time from internet speed.
Number to Words Converter
Write a number in English words — cardinal, ordinal and check format — and in Russian in any case, including amounts in rubles.
Moles Calculator: Mass, Moles, Volume, Particles
Convert between mass, moles, gas volume at STP and number of particles: n = m/M, n = V/Vm, n = N/NA, with a solution.
Russian Transliteration: Cyrillic to Latin
Convert Russian Cyrillic text to Latin letters by the passport rules, GOST 7.79-2000, ISO 9 or as a URL slug, and back.
Two's Complement Calculator
Sign-magnitude, ones' complement and two's complement of an integer in 8, 16 and 32 bits, and two's complement to decimal.
Color Converter: HEX, RGB, HSL
Convert colors between HEX, RGB and HSL with a solution and the binary color code.
Coordinate Converter: DMS to Decimal Degrees
Convert latitude and longitude between degrees, minutes, seconds and decimal degrees, with a solution.
Decimal to Fraction and Fraction to Decimal Calculator
The calculator converts decimals to fractions and fractions to decimals, finds the repeating part of infinite decimals and shows the steps.
Astronomical Units Converter: AU, Light-Year, Parsec
Convert kilometers, astronomical units, light-years and parsecs, with a solution and the light travel time.
Mixed Number to Improper Fraction Calculator
The calculator converts mixed numbers to improper fractions and improper fractions to mixed numbers with a step-by-step solution.
Percent to Fraction and Fraction to Percent Calculator
The calculator converts percentages to fractions and decimals, and fractions and decimals to percentages, with a step-by-step solution.
Repeating Decimal to Fraction Calculator
The calculator converts a repeating decimal to a fraction using the rule of nines and shows a step-by-step solution.
Roman Numerals Converter
The converter turns numbers from 1 to 3999 into Roman numerals and back, breaks them down by place value and checks that they are written correctly.
Converters from all sections of the site are gathered here. Unit converters convert length, mass, area, volume, time, speed and temperature from one unit to another — exactly, with a solution and a table of the value in all units at once. The scale calculator helps with map and plan problems.
- Length — mm, cm, m, km, inches, feet, miles.
- Mass — g, kg, t, pounds, ounces, stones.
- Area — cm², m², hectares, acres.
- Volume — mL, L, m³, gallons, barrels.
- Time — seconds, minutes, hours, days, years.
- Speed — km/h, m/s, mph, knots.
- Temperature — Celsius, Fahrenheit, Kelvin.
- Scale — map and real distances.
Besides units, you can convert number bases, data units, fractions and percentages, Roman numerals, coordinates and colors, write numbers as words and transliterate text.
For school subjects there are angles, pressure, energy, force, power, density, acceleration, electrical units, SI prefixes, scientific notation, radiation units, Morse code and Old and New Style dates. For everyday life there are cooking measures, clothing and shoe sizes, fuel consumption, screen size and Unix time.