Date & Time calculator
Unix Timestamp Converter
Convert Unix timestamps in seconds or milliseconds into UTC ISO date-time values and readable time parts.
FormulaUTC milliseconds = Unix seconds x 1000, or milliseconds as entered
Formula
Unix timestamp conversion
UTC milliseconds = Unix seconds x 1000, or milliseconds as entered
Unix timestamp 0 seconds converts to 1970-01-01T00:00:00.000Z.
FAQ6 common questions for this calculator.
FAQs
What is Unix time?+
Unix time counts elapsed seconds from 1970-01-01 00:00:00 UTC, ignoring leap seconds in ordinary programming use.
Should I enter seconds or milliseconds?+
Most APIs use seconds or milliseconds. Choose the unit that matches your source before converting.
How does the Unix Timestamp Converter calculate the result?+
For the Unix Timestamp Converter, it uses the Unix timestamp conversion: UTC milliseconds = Unix seconds x 1000, or milliseconds as entered. Unix timestamp 0 seconds converts to 1970-01-01T00:00:00.000Z.
What information do I need to use the Unix Timestamp Converter?+
For the Unix Timestamp Converter, enter the relevant dates, times, timezone, or calendar settings requested by the form. Exact dates matter because month lengths, leap years, and boundary days can change the result.
How accurate is the Unix Timestamp Converter?+
Unix Timestamp Converter is accurate for the values and assumptions entered on this page. It uses the Unix timestamp conversion. Recheck the inputs before relying on the estimate.
What should I check before using the Unix Timestamp Converter result?+
For the Unix Timestamp Converter, check the date and time fields, date format, timezone, daylight-saving changes, inclusive or exclusive endpoints, and whether weekends or holidays should count.
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How to use the Unix Timestamp Converter
Convert Unix timestamps in seconds or milliseconds into UTC ISO date-time values and readable time parts. The page also explains the unix timestamp conversion and shows a practical example: Unix timestamp 0 seconds converts to 1970-01-01T00:00:00.000Z.
- 1
Enter your details
Enter the source value, then choose the units or values you want to convert.
- 2
Check the calculation
Review the result alongside the unix timestamp conversion: UTC milliseconds = Unix seconds x 1000, or milliseconds as entered.
- 3
Compare scenarios
Change one or more inputs to see how they affect the unix Timestamp Converter result before you use the estimate.