Date to Milliseconds & Milliseconds to Date Converter
Quick answer: choose a local date and time, then select Date to milliseconds to get Unix seconds and milliseconds. You can also paste a 10-digit second or 13-digit millisecond timestamp to convert it to UTC and local date values.
Conversion appears here.
10-digit seconds or 13-digit milliseconds?
A 10-digit Unix timestamp, such as 1786233600, usually represents seconds. A 13-digit Unix timestamp, such as 1786233600000, represents milliseconds and is common in JavaScript and many APIs.
The timestamp identifies the same instant worldwide. UTC is the universal representation, while local date and time depend on your browser time zone.
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FAQ
What is the Unix epoch?
It begins at 1970-01-01 00:00:00 UTC.
Why do local and UTC values differ?
They are two calendar representations of the same instant in different time zones.
Reviewed: 2026-08-15