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
Select US or imperial gallons explicitly; the two gallon sizes are different.
Reference
NIST unit-conversion factors. Factors checked 24 October 2026. Use authoritative methods for safety-critical or high-precision work.