Unix Timestamp Milliseconds Converter

By length. A current epoch time in seconds is 10 digits; in milliseconds it is 13. A 13-digit value read as seconds lands tens of thousands of years in the future, which is the classic symptom — the conversion here detects the unit and says which it used rather than leaving you to guess.

JavaScript Date.now() and Java System.currentTimeMillis() both return milliseconds. Unix date, PHP time(), Python time.time() and most databases use seconds. Passing a value across that boundary without converting is one of the most common date bugs there is.

Both UTC and your own local time are shown, because the epoch itself has no timezone — it counts seconds since a fixed instant. Confusion almost always arrives when the value is formatted, which is why both are given side by side rather than one silently.

Some counts include both the start and the end date, and some include only one. That single day is usually the difference. Check which way your office, court or contract counts before relying on a deadline.

No. There is no sign-up and no limit. Use it on a phone or computer whenever a date question comes up, and the dates you enter are not saved anywhere.

Yes. The calculators use the real calendar, so 29 February is counted in leap years and every month has its correct number of days, including the short ones.

It reads today’s date and time from your device where it needs them, such as for age or countdowns. If your phone or computer clock is wrong, correct it and the results will follow.

India Standard Time is five and a half hours ahead of GMT and UTC, all year round, because India does not change its clocks for summer. Other countries do, so their gap with IST can shift.