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Timestamp Converter

Convert Unix timestamps to human-readable dates

Reviewed: AnyCalc Editorial|2026-07-19|Editorial policy|About

What this calculator does

Unix timestamps represent dates as the number of seconds (or milliseconds) elapsed since January 1, 1970 UTC. This converter translates between Unix timestamps and human-readable date formats, supporting seconds and milliseconds precision. Developers encounter timestamps constantly in APIs, databases, log files, JWT tokens, and event tracking systems. The tool displays the equivalent date and time in UTC and your local timezone, converts human-readable dates back to timestamps, and shows relative time (e.g., "3 hours ago"). It also handles ISO 8601 format, RFC 2822, and common date string patterns that APIs and databases use.

Unit:

How to use

  1. 01
    Enter a timestamp or date
    Type a Unix timestamp or select a date and time.
  2. 02
    Choose timezone
    Select your target timezone for accurate conversion.
  3. 03
    View conversions
    See the result in Unix timestamp, ISO 8601, and human-readable formats.

Timestamp Converter FAQ

What is the Unix epoch?▾
The Unix epoch is January 1, 1970 at 00:00:00 UTC. Unix timestamps count the number of seconds since this reference point. For example, a timestamp of 1700000000 represents November 14, 2023. Timestamps before 1970 are negative numbers.
Should I use seconds or milliseconds for timestamps?▾
Unix traditionally uses seconds (10 digits like 1700000000). JavaScript, Java, and many APIs use milliseconds (13 digits like 1700000000000). Always check documentation for which precision a system expects. This tool accepts both and converts between them.
How do I handle timezones with timestamps?▾
Unix timestamps are always UTC by definition — they represent an absolute moment in time. Convert to local time only for display purposes. Store and transmit timestamps in UTC, and convert to the user timezone in the frontend. Never store local times as timestamps without timezone information.

Interpret carefully

Outputs are decision-support estimates, not a substitute for professional judgment.

  • Treating Timestamp Converter output as a final professional diagnosis, quote, or legal determination
  • Entering approximate values when the result is sensitive to units or precision
  • Applying the FAQ answer (“What is the Unix epoch?”) to a special case without checking assumptions

Next steps

  1. Double-check inputs against your source documents (labs, statements, specs, or notes).
  2. Confirm the method below matches your use case before you act on the number.
  3. For medical, financial, or production decisions, verify with a qualified professional.

Disclaimer: Results are informational only and do not constitute medical, financial, legal, or professional advice. Report issues: sublimernj@gmail.com

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