Free Online Converters
Convert measurements, or translate a number between binary, hex, and other bases.
- Unit Converter Length, weight, temperature, and more. Get started
- Speed Converter kph, mph, m/s, knots, and Mach. Get started
- Temperature Converter Celsius, Fahrenheit, Kelvin and Rankine, instantly. Get started
- Binary Converter Turn text into binary code and back again. Get started
- Hex Converter Translate text into hex bytes and back. Get started
- Base Converter Convert numbers between binary, octal, decimal and hex. Get started
- Excel to PDF Spreadsheet to a printable PDF. Get started
- Excel to CSV Every sheet as its own clean CSV. Get started
Which converter to use
Unit Converter covers length, temperature, area, volume, weight, and time. Type in either side and the other updates. Speed Converter switches kph, mph, m/s, knots, and Mach.
Binary Converter turns text and binary. Hex Converter does the same for hexadecimal. Base Converter converts a number between bases, including binary, octal, decimal, and hex.
Temperature Converter types in any of Celsius, Fahrenheit, Kelvin, or Rankine and fills the other three, with absolute-zero checking.
Average Calculator reports mean, median, mode, and range in one pass. Standard Deviation shows population and sample results with every step in a table.
Excel to PDF turns a worksheet into a paginated PDF with a preview. Excel to CSV converts every sheet to its own clean CSV download.
Abacus is a clickable ten-rod soroban. Pythagorean theorem solves any side of a right triangle with a live diagram. Surface area and volume each cover eight solids with steps. Radians to degrees converts both directions plus turns, fractions does exact + − × ÷, and percent error and half-life show their working. Grade calculator averages weighted assignments to a letter grade, and final grade says what the exam must score.
Base64 and URL encoding are with the developer tools, because they encode text rather than convert a measurement or a number base.