Milliseconds to Seconds

Convert between millisecond and second timestamps. JavaScript uses ms, Unix uses seconds. Both fields sync in real time.

Milliseconds:

Seconds:

Date (from timestamp):

Enter milliseconds or seconds to see the corresponding date.

Milliseconds vs Seconds

Convert between millisecond and second timestamps. JavaScript uses milliseconds (Date.now()), while Unix/Linux uses seconds. This tool syncs both in real time.

When to Use

JavaScript: Date.now(), new Date().getTime() return milliseconds
Unix/Python/PHP: time.time(), time() return seconds
APIs: Some APIs use ms (e.g., Discord), others use seconds

Conversion

1 second = 1000 milliseconds
1640995200 (seconds) = 1640995200000 (ms)
1640995200000 (ms) = 1640995200 (seconds)

Pro Tips

Edit either field – the other updates automatically
Use "Current Time" to get the current timestamp in both formats

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