All-in-one converter for length, weight, volume, area, speed, temperature, and time with 500+ units.
Type a number, pick the unit you have, pick the unit you want, and this page converts it across seven categories - length, weight, volume, area, speed, temperature, and time - drawing on a catalog of more than 500 units. Common pairs like miles to kilometers and pounds to kilograms sit next to nautical miles, imperial pints, and furlongs. Two things catch people out. Temperature does not convert by a single factor: the scales have different zero points, so you cannot multiply your way from Fahrenheit to Celsius. And several unit names come in US and imperial versions, so 'a gallon' is not one fixed amount.
A concrete input and expected output from the current implementation.
Input
Convert 37 °C to °F
Expected output
37 °C = 98.6 °F
The two scales share neither zero nor degree size, so the converter applies the offset formula °F = (9/5) * °C + 32. Here 37 * 1.8 = 66.6 and 66.6 + 32 = 98.6, which is why normal body temperature is 98.6 °F. A plain factor of 1.8 would have returned 66.6, so the offset is what makes the temperature category different from every other one.
The page splits its units into seven category lists, so the first step is choosing where your number belongs. Within a category, every unit converts to every other - furlongs to meters, knots to miles per hour, weeks to minutes - which means you never have to know the relationship between two units yourself; you only supply the value and the two unit names.
Where an authority fixes a conversion exactly - the inch is 25.4 millimeters, the pound 0.45359237 kilograms, the mile 1.609344 kilometers - the converter relies on that definition rather than a rounded shortcut. Results that do not land on a clean number come back as decimals. Converting the reverse direction yields the reciprocal of the same relationship, so miles-to-kilometers and kilometers-to-miles always agree.
About 20 percent. One US gallon is exactly 3.785411784 liters; one imperial gallon is exactly 4.54609 liters. The page lists them as separate units, so when a source says only 'gallons', decide which system it uses before converting, or the result will be off by roughly a fifth.
No. This tool converts physical measures - length, weight, volume, area, speed, temperature, and time. Money is not a fixed unit of measure: exchange rates change every day, and a static page has no source for a current rate. For currency, use your bank or a live exchange-rate service instead.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
Convert CSV data into structured JSON arrays or objects with automatic type detection.
Transform JSON arrays and objects into downloadable CSV spreadsheet format.
Convert YAML configuration files to JSON format with validation and formatting.
Parse XML documents and convert them to equivalent JSON structure with attributes.
Convert tab-separated values to comma-separated format with proper escaping.
Convert numbers between binary, octal, decimal, and hexadecimal bases.