Unix Timestamp Converter
Unix timestamp converter
Convert timestamps with explicit seconds/milliseconds handling and timezone-aware UTC/local summaries.
UTC ISO: syncing...
Unix to date-time
2026-01-01 00:00
UTC (UTC+0) • input interpreted as seconds.
Converted
UTC
UTC+0
Parse timestamp input and render selected zone, UTC, and local outputs.
Supports commas, spaces, signed values, and scientific notation.
Unix seconds
1,767,225,600
Unix milliseconds
1,767,225,600,000
Selected zone
2026-01-01 00:00
UTC
2026-01-01 00:00
Local (UTC)
2026-01-01 00:00 (UTC+0)
Quick examples and basis notes
Quick examples
Basis: Unix timestamps represent elapsed seconds from 1970-01-01 00:00:00 UTC. They are timezone-independent; only rendered date-time labels depend on the selected IANA time zone and DST rules.
Formula
Unix seconds = Unix milliseconds / 1000; Unix milliseconds = Unix seconds × 1000 t_{unix,ms} = 1000 \cdot t_{unix,s} Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
t_{unix,s} | Unix timestamp in seconds | seconds | |
t_{unix,ms} | Unix timestamp in milliseconds | milliseconds |
- Resolve input date-time to one UTC instant using selected IANA timezone rules.
- Express that instant as Unix milliseconds from epoch.
- Derive Unix seconds by dividing by 1000.
Example
Worked example: UTC midnight
- 1 Datetime = 2026-01-01 00:00 UTC
- 2 Unix seconds = 1767225600
- 3 Unix milliseconds = 1767225600000
2026-01-01 00:00 UTC maps to unix 1767225600 seconds.
How
- Choose single conversion or batch conversion mode.
- Enter datetime or Unix timestamp input and choose auto/seconds/milliseconds scale when needed.
- Select the output timezone and review selected-zone, UTC, and local renderings.
- Copy quick result or full report details for handoff.
Avoid
- Mixing seconds and milliseconds formats.
- Assuming display timezone changes the Unix value itself.
- Ignoring DST disambiguation for repeated local times.
- Typing unsupported characters in Unix input rows.
FAQ
How do I know if input is seconds or milliseconds?
Use Auto detect for common inputs: values near 13 digits are usually milliseconds and values near 10 digits are usually seconds. You can override with explicit Seconds or Milliseconds mode.
Can I convert negative unix timestamps?
Yes, negative values represent instants before 1970-01-01.
Does timezone matter for unix timestamps?
Unix timestamp itself is timezone-independent, but display formatting depends on selected zone.
What is the 2038 note in this tool?
It highlights whether the Unix-second value is near or beyond the signed 32-bit boundary at 2038-01-19 03:14:07 UTC, which can affect legacy systems.
Switch
Switch12
No match.