Add Seconds
What time is it N seconds from now?
Seconds added to an instant, with the resulting Unix timestamp beside the human reading — for anything you are about to put in a token or a cache header.
Questions people ask
The things that come up about add secondss, answered plainly.
How do I work out a token expiry?
Add the lifetime in seconds to the issue time. A JWT `exp` of one hour is `iat` plus 3600; the page gives both the timestamp to put in the claim and the human date to sanity-check it against.
How many seconds in a day?
86,400, and Unix time always uses that figure — leap seconds are not represented, so adding 86,400 always advances the timestamp by exactly one day.
Related tools
Move a date forwards or backwards by a span, with the calendar's rules applied.
Add MinutesMinutes added to a time, with hour and date rollover handled, and the answer in both 24-hour and 12-hour form.
Unix Timestamp ConverterPaste a timestamp and get the date; paste a date and get the timestamp. Seconds, milliseconds, microseconds and nanoseconds are detected from the digit count, and the guess is shown so you can override it.
Seconds Between DatesThe count that Unix time itself is measured in — an exact second difference between two instants, with the millisecond, microsecond and nanosecond totals beside it.
Time Offset CalculatorHours, minutes and seconds applied to an instant, with the resulting timestamp, the date rollover, and any daylight-saving transition the span crossed.