Converters calculators
Units, number bases and currency.
Unit conversion covers a lot of ground, so this category has both a general-purpose converter for everyday units and a few focused converters for cases where a dedicated tool is clearer than a giant dropdown list.
Use Unit Converter for common physical units (length, weight, volume); use the specific converters below for number bases, currency, temperature, or digital storage, where the conversion logic is different enough to deserve its own page.
Unit Converter
Free Unit Converter to convert length, weight, temperature, area, volume, speed, and other measurement units quickly and accurately.
Binary / Hex / Decimal Converter
Free Binary, Octal, Decimal, and Hexadecimal Converter. Convert number systems quickly and accurately online.
Currency Converter
Free Currency Converter to convert between major world currencies with live exchange rates. Fast, accurate, and easy to use online.
Temperature Converter
Free Temperature Converter to convert between Celsius, Fahrenheit, and Kelvin instantly, with the formula shown for each conversion.
Data Storage Converter
Free Data Storage Converter to convert between bits, bytes, KB, MB, GB, and TB using binary (1,024-based) units.
How to choose the right calculator
- Length, weight, or volume between metric and imperial → Unit Converter
- Binary, decimal, or hexadecimal for programming or coursework → Binary / Hex / Decimal Converter
- One currency to another → Currency Converter
- Celsius, Fahrenheit, or Kelvin → Temperature Converter
- Bits, bytes, KB, MB, GB, or TB → Data Storage Converter
Frequently asked questions
Temperature conversion isn't a simple multiply-by-a-factor calculation like length or weight — Fahrenheit needs an offset as well as a scale change — so it gets a dedicated calculator with the formula shown clearly rather than being buried in a general-purpose dropdown.
Data Storage Converter uses binary units (1,024-based), matching what your operating system shows for file sizes and free space — not the decimal units some storage manufacturers advertise capacity in. The calculator's own page explains this in more detail.