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TIMESTAMP

Epoch Milliseconds Converter

Convert a value in epoch milliseconds to a readable date in UTC, local time and ISO 8601.

Epoch milliseconds

Epoch milliseconds is the same Unix epoch (1 January 1970, 00:00:00 UTC) counted in thousandths of a second instead of whole seconds. It is the unit JavaScript's Date.now() and many JSON APIs return, and it has 13 digits today, for example 1790000000123.

When to use this instead of Milliseconds to Date

This tool and Milliseconds to Date use the same conversion; both exist because people search for “epoch” and “milliseconds” as different terms for the same idea. Use whichever page you found first, or the Unix Timestamp Converter if you are not sure which unit you have.

Want the background? Read our comprehensive guide: Seconds vs Milliseconds Timestamps.

How to use this tool

  1. Enter the value in epoch milliseconds.
  2. Select Convert.
  3. Read the date in UTC, local time and ISO 8601.
  4. Copy the value you need.

Examples

The millisecond fraction is kept in the result.

A value from Date.now()

1790000000123 (milliseconds)

UTC
2026-09-21 14:13:20.123 UTC
ISO 8601
2026-09-21T14:13:20.123Z

The Unix epoch itself

0 (milliseconds)

UTC
1970-01-01 00:00:00 UTC

A 10-digit value read as milliseconds

1700000000 (milliseconds)

UTC
1970-01-20 16:13:20 UTC

Only 20 days after the epoch: this is a seconds value read as milliseconds by mistake.

Frequently Asked Questions

How many digits does epoch milliseconds have today?
13 digits, for example 1790000000123. It will reach 14 digits in the year 2286.
How do I get the current time in epoch milliseconds?
In JavaScript, Date.now() returns it directly. You can also see the live value on the Current Unix Timestamp page.
What if my value has 10 digits?
A 10-digit value is in seconds, not milliseconds. Use the Unix Timestamp Converter, which detects the unit automatically.
Are microseconds or nanoseconds supported?
Not directly. Divide a microsecond value by 1,000, or a nanosecond value by 1,000,000, to get milliseconds first.

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