Unit converters
Length, weight, temperature, area, volume, speed, time, data and pressure.
- Angle Converter Move an angle between degrees, radians, gradians, arcseconds and eight other measures.
- Area Converter Convert surface areas between metric and imperial units, including acres and hectares.
- Astronomical Converter Convert space distances between astronomical units, light years, parsecs and everyday metric units.
- Bytes Converter Convert data sizes between bits, bytes and both the decimal and binary multiples.
- Density Converter Switch a density figure between metric and imperial units, from kg/m3 to pounds per gallon.
- Electric Current Converter Rescale a current reading across amperes and every SI prefix, plus two legacy CGS units.
- EM to Percent Converter Rewrite em font sizes as percentages, which behave identically in a CSS font-size rule.
- EM to Point Converter Turn em type sizes into points for print stylesheets, PDF exports and design handoffs.
- EM to PX Converter Work out what an em value renders as in pixels for the context it lives in.
- Energy Converter Convert energy across nineteen units, from electronvolts up to megawatt hours and tonnes of TNT.
- Force Converter Convert forces between newtons, kilogram force, pounds force and ten other engineering units.
- Frequency Converter Convert frequencies across the hertz family and into rotational units such as RPM and rad/s.
- Fuel Converter Convert fuel economy figures between miles per gallon, litres per 100 km and kilometres per litre.
- Inches to Pixels Converter Convert physical inches into CSS pixels using the 96 pixels per inch the web is built on.
- Length Converter Convert distances between thirteen metric and imperial length units, one value per line.
- Mass Converter Convert mass values across twelve metric and imperial units, from micrograms to long tons.
- Percent to EM Converter Turn percentage font sizes into em, the shorter spelling of the same relative measure.
- Percent to Point Converter Work out what a percentage font size becomes in points for print output and PDFs.
- Percent to PX Converter Read a percentage font size as an actual pixel measurement for its parent context.
- Percent to REM Converter Convert percentage font sizes into rem so type stops compounding through nested components.
- Point to EM Converter Bring point sizes out of a print spec and into em values a stylesheet can use.
- Point to Percent Converter Express point sizes as CSS percentages relative to whatever base font size you set.
- Point to PX Converter Turn point sizes from print or word processor documents into CSS pixels.
- Point to REM Converter Convert a point based type scale into rem values anchored to the document root.
- Power Converter Convert power ratings between kilowatts, horsepower, BTU per hour and eleven other units.
- Pressure Converter Convert pressure between bar, psi, pascals, atmospheres and the mercury and water column units.
- PX to EM Converter Convert pixel values to em against whatever font size the surrounding element uses.
- PX to Percent Converter Express a pixel font size as a percentage of the parent element size.
- PX to Point Converter Convert CSS pixels to typographic points for print stylesheets and design handoff.
- PX to REM Converter Turn pixel values from a design spec into rem, using any root font size you like.
- REM to Percent Converter Express rem font sizes as percentages for environments that reject absolute or root relative units.
- REM to Point Converter Read a rem type scale in points, the unit print vendors and PDF tooling expect.
- REM to PX Converter See what a rem value renders as in pixels, against the root font size you choose.
- Speed Converter Convert speeds between kilometres per hour, miles per hour, metres per second, knots and Mach.
- Temperature Converter Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine with the formula shown.
- Time Converter Convert a duration between twelve time units, from nanoseconds up to centuries.
- Volume Converter Convert volumes between metric, US customary and imperial units, including both gallons.
- Weight Converter Convert kilograms to pounds, stones, ounces and back, with a reference table for every pair.
Other categories
- JSON tools
- XML tools
- YAML tools
- CSV and TSV tools
- HTML tools
- CSS tools
- JavaScript tools
- SQL tools
- Code formatters
- Minifiers
- Validators
- Data converters
- Encoders and decoders
- Escape and unescape
- Hash and cryptography
- String and text tools
- Number tools
- Color tools
- Date and time tools
- Generators
- Random data generators
- Image tools
- Compress and decompress
- Network and DNS tools
- Web and developer tools
- Chart makers
- Cheat sheets
- Fun text tools
- Calculators