Universal Unit Converter
Convert across metric and imperial systems simultaneously. Type into any field to update all units instantly.
Frequently Asked Questions
Which units can I convert?▼
Length, weight, temperature, volume, area and digital storage, covering metric and US customary units.
How accurate are the conversions?▼
Factors are exact where the definitions are exact. An inch is exactly 2.54 cm, and a US gallon is exactly 3.785411784 litres. Results are shown with a sensible number of digits.
What is the difference between KB and KiB?▼
KB (kilobyte) means 1,000 bytes and KiB (kibibyte) means 1,024 bytes. Hard drive makers use the decimal units, and many operating systems use the binary ones.
What is absolute zero?▼
Temperatures below absolute zero (−273.15 °C, 0 K, −459.67 °F) are physically impossible, so the converter tells you rather than showing a number.
Is my data sent to a server?▼
No. The converter runs entirely in your browser, so nothing you enter is uploaded, stored or tracked. Once the page has loaded it keeps working without a connection.