METHOD
How it is calculated
Difference between actual instants; a displayed countdown day contains 24 hours.
◷ Dates and time
Countdown calculator
Count down to a date and time in a chosen time zone.
01
Your inputs
Starting values are an example. Replace them with your own.
Your inputs stay in your browser.
02
Your result
Enter your details and run the calculation.
TRACEABLE
Sources and validity
Basic arithmetic or geometry using the formula shown. Uses only your inputs.
How we maintain data ↗