How to use this tool
Enter a local date and time from your device’s time zone. The browser converts that local moment to an instant and subtracts it from the current device time. Total days are full 24-hour periods, rather than calendar dates. The result updates while the page is open and JavaScript is enabled. For a fixed interval between dates, use the date duration calculator.
Try these values
From 12:00 on Monday to 13:30 on Tuesday, without a clock change, the elapsed time is 1 day, 1 hour and 30 minutes. A daylight saving transition can change the elapsed hours between two local midnights.
Pick a moment you can identify
A date and time without a place can be ambiguous. This counter interprets your entry in the time zone configured on your device. If the event happened somewhere else, convert the event’s time first. Around an autumn clock change, a local time may occur twice; for precise record keeping, keep the original UTC timestamp or offset alongside the event.
Elapsed time is made of hours
The days shown here are complete 24-hour blocks. That can differ from the number of calendar dates crossed, especially around daylight saving changes. Use this counter for an ongoing duration such as the time since a project began. Use the date duration calculator for a fixed interval between calendar dates, or the countdown page when the target is still in the future.
Common questions
Does the counter keep running in another tab?
It recalculates from the original timestamp when the browser refreshes it. Background updates may be delayed by your browser.
Which time zone is used?
The local time zone configured on your device. Use the time zone converter when the event happened elsewhere.
Can I track a future event?
Use the countdown tool for a date and time in the future.
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