Free Online Converter Tools Tools

Free online temperature unit conversion tool, supports real-time conversion between 11 temperature units including Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, and Rømer.

Free online date and time conversion tool, supports timestamp conversion, timezone conversion, mutual conversion between multiple date formats, provides batch conversion functionality. Suitable for development debugging, data analysis, cross-timezone collaboration and other scenarios.

Free online integer base conversion tool, supports mutual conversion between bases 2-64 including binary, octal, decimal, hexadecimal, etc. Enter a value in any base, and other bases will be automatically calculated. Suitable for programming development, mathematical calculations and other scenarios.

Free online Roman numeral conversion tool, supports mutual conversion between Arabic numbers and Roman numerals, provides step-by-step conversion breakdown and common number reference. Suitable for learning Roman numerals, historical research, programming development and other scenarios.

Free online Chinese character to Pinyin conversion tool, supports multiple Pinyin styles such as with tone marks, without tone marks, numeric tone marks, initials, etc., supports polyphonic character recognition, batch conversion, file upload and other features, suitable for learning Pinyin, pronunciation annotation and other scenarios.

Free online Simplified-Traditional Chinese conversion tool, supports mutual conversion between Simplified Chinese and Traditional Chinese. Supports file upload, history saving, suitable for document processing, web content conversion and other scenarios, with a simple and easy-to-use interface.

Free online length unit conversion tool, supports real-time conversion between 12 length units including meter, kilometer, centimeter, millimeter, inch, foot, mile, nautical mile, light year, etc. Enter any length value to automatically calculate the corresponding values for all units.

Free online Chinese capital amount conversion tool, supports bidirectional conversion between numeric amounts and Chinese capital amounts. Provides real-time conversion and batch conversion functions, complies with financial standards, accurate to the cent. Suitable for financial reimbursement, invoice issuance, contract amounts and other scenarios.

Free online Unicode encoding conversion tool, supports converting text to Unicode and Unicode to text, supports multiple encoding formats such as U+ format, HTML entities, Java, Python, etc., real-time conversion, convenient and fast.

Free online area unit conversion tool, supports real-time conversion between 18 area units including square meter, square kilometer, hectare, acre, mu, square foot, etc. Includes four main categories: international units, metric units, imperial units, and Chinese customary units. Enter any area value to automatically calculate the corresponding values for all units.

Free online volume unit conversion tool, supports real-time conversion between 25 volume units including cubic meter, liter, milliliter, gallon, pint, barrel, etc. Includes four main categories: international units, metric volume units, imperial units, and US units. Enter any volume value to automatically calculate the corresponding values for all units.

Free online weight unit conversion tool, supports real-time conversion between 23 weight units including kilogram, gram, pound, ounce, jin, liang, etc., and provides reference weights for common objects.

Free online energy unit conversion tool, supports real-time conversion between 17 energy units including joule, calorie, kilowatt-hour, electronvolt, British thermal unit, thermochemical calorie, foot-pound, ton of TNT, etc. Enter any energy value and convert with one click – suitable for physics calculations, nutrition science, engineering thermodynamics and other scenarios.

Free online data storage unit conversion tool, supports real-time conversion between bit, byte, KB, MB, GB, TB, PB, EB, ZB, YB and more. Enter any value to automatically calculate the corresponding results for all units. Suitable for hard drive capacity comparison, network traffic calculation, data storage planning and other scenarios.

Free online angle unit conversion tool, supports real-time conversion between 8 angle units including degree, radian, gradian, arcminute, arcsecond, revolution, mil, and quadrant. Accurate calculation, suitable for mathematical calculations, engineering measurement, navigation and other scenarios.

Free online pressure unit conversion tool, supports real-time conversion between 12 pressure units including Pascal, kilopascal, megapascal, bar, standard atmosphere, PSI, millimeter of mercury, etc. Enter any pressure value to automatically calculate the corresponding values for all units. Suitable for engineering design, meteorological analysis, hydraulic system calculations and other scenarios.

Free online time unit conversion tool, supports real-time conversion between milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, centuries, millennia, as well as ancient Chinese time units such as Ke, a stick of incense, Jiazi, and Ji. Suitable for software development, project management, historical research and other scenarios.

Free online speed unit conversion tool, supports real-time conversion between various speed units including m/s, km/h, mph, knot, ft/s, Mach, speed of light, and more. Enter any speed value to automatically calculate the corresponding results for all units. Suitable for motion analysis, transportation, aerospace and other scenarios.

Free online power unit conversion tool, supports real-time conversion between 12 power units including watt, kilowatt, megawatt, horsepower, BTU/hour, kcal/hour, and more. Enter any power value to automatically calculate the corresponding values for all units. Suitable for electrical and mechanical engineering, thermodynamic calculations, home appliance power consumption comparison and other scenarios.

Free online electric current unit conversion tool, supports real-time conversion between various current units including Ampere (A), kiloampere (kA), milliampere (mA), microampere (μA), nanoampere (nA), picoampere (pA), megaampere (MA), and gigaampere (GA). Enter any current value to automatically calculate the corresponding values for all units. Suitable for electronic circuit design, electrical engineering calculations, equipment selection and other scenarios.

Free online frequency unit conversion tool, supports real-time conversion between various frequency units including Hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz), revolutions per minute (rpm), radians per second (rad/s), and more. Enter any frequency value to automatically calculate the corresponding values for all units. Suitable for radio communications, signal processing, motor speed calculations and other scenarios.

Free online voltage unit conversion tool, supports real-time conversion between voltage units including Volt (V), Kilovolt (kV), Millivolt (mV), Microvolt (μV), Nanovolt (nV), Picovolt (pV), and more. Enter any voltage value to automatically calculate the corresponding values for all units. Suitable for circuit design, electronics repair, electrical engineering and other scenarios.

Free online capacitance unit conversion tool, supports real-time conversion between capacitance units including Farad (F), Millifarad (mF), Microfarad (μF), Nanofarad (nF), Picofarad (pF), and more. Enter any capacitance value to automatically calculate the corresponding values for all units. Suitable for electronic engineering, circuit design, component selection and other scenarios.

Free online blood sugar unit conversion tool, supports real-time conversion between mmol/L and mg/dL, provides blood sugar reference ranges and health assessments, helping diabetes patients and healthy individuals monitor blood glucose levels. Enter a blood sugar value to instantly convert between both units with one click.

Free online blood lipid unit conversion tool, supports real-time conversion of blood lipid indicators including total cholesterol, LDL-C, HDL-C, triglycerides, and free fatty acids between mmol/L and mg/dL, and provides clinical reference range assessment. Suitable for medical report interpretation, cardiovascular health monitoring and other scenarios.

Free online kidney function unit conversion tool, supports unit conversion of common kidney function indicators including serum creatinine, blood urea nitrogen, uric acid, and eGFR, provides clinical reference ranges and health assessments. Suitable for medical report interpretation, kidney disease screening, and daily health monitoring.

Free online text and ASCII code conversion tool, supports converting text to ASCII codes and ASCII codes to text. Supports multiple encoding formats (plain numbers, HTML entities, hexadecimal), custom delimiters, Unicode character processing and more. Suitable for programming debugging, character encoding learning, data transmission and other scenarios.

Free online UTF-8 encoding converter supporting multiple character encoding formats including UTF-8, UTF-16, ASCII, Base64, Hex, URL encoding, HTML entities, etc. Perfect for development debugging and data processing.

Free online tool to decompose Chinese characters into radicals and components, with structure analysis, pinyin, strokes, Wubi code, and stroke animation.

Free online concentration unit conversion tool supporting real-time conversion between percentage, permille, ppm, ppb, ppt, ppq, g/L, mg/L, μg/L, ng/L, g/mL, kg/m³, mg/dL and more.

Free online clothing size converter, supporting real-time conversion between international standards (US, UK, EU, CN, JP, etc.) for men's and women's tops, pants, dresses, shoes and more. Easily solve size confusion for international shopping and travel.

Free online shoe size converter supporting real-time conversion between EU, US, UK, CM, JP and other international sizing standards. Automatically adapts for men's, women's and kids' sizes. Perfect for international shopping and size comparison.

Free online tire size calculator. Enter tire width, aspect ratio, and rim diameter to automatically calculate overall diameter, sidewall height, section width, circumference, revolutions per km/mile and other key parameters. Ideal for tire comparison and upgrade reference.

Free online tire pressure unit conversion tool supporting real-time conversion between PSI, kPa, bar, atm, mmHg, and kg/cm². Ideal for car, truck, and bicycle tire pressure conversion.