Converters — Free, In Your Browser
16 free tools, no sign-up, files never uploaded.
Convert almost anything: currencies at live mid-market rates, times across world time zones with DST handled, metric and imperial units for length, weight, area and speed, temperatures, data storage sizes, number bases, Roman numerals and numbers to words.
Conversions are exact and instant - factors follow international definitions, and everything except live currency rates works fully offline in your browser.
All converters
- Unit Converter — Convert length, weight, temperature, area, volume, speed, time and data units.
- Currency Converter — Live mid-market exchange rates for 160+ currencies.
- Time Zone Converter — Convert any date & time between world time zones, DST-aware.
- Binary Converter — Convert binary to decimal, hex or octal - and back.
- Decimal Converter — Convert decimal numbers to binary, hex and octal instantly.
- Hex Converter — Convert hexadecimal to decimal, binary or octal - and back.
- Octal Converter — Convert octal to decimal, binary or hex - and back.
- Roman Numeral Converter — Convert numbers to Roman numerals and back - auto-detects direction.
- Number to Words — Spell out any number in words - international or Indian system.
- Scientific Notation Converter — Convert between plain numbers, scientific and engineering notation.
- Temperature Converter — Celsius, Fahrenheit and Kelvin - all three at once.
- Data Storage Converter — Convert bits, bytes, KB, MB, GB, TB - decimal and binary units.
- Speed Converter — km/h, mph, m/s, knots and Mach - converted instantly.
- Area Converter — Square metres, feet, acres, hectares and more.
- Length Converter — Metres, feet, inches, miles, kilometres and more.
- Weight Converter — Kilograms, pounds, ounces, stones and tonnes.