Choose the input and output units, then enter a value. Results update on your device and are rounded for display.
Rounded values for everyday reference. Mass is shown separately from force. US and imperial gallons are distinct. Time units are fixed intervals, not calendar months or years. Currency rates are not supplied.
Unit conventions
Days and weeks are fixed intervals here. Months, years, time zones and daylight-saving calendar calculations are not included.
Reference
NIST unit-conversion factors. Factors checked 24 October 2026. Use authoritative methods for safety-critical or high-precision work.