Epoch Converter

DateTime to Epoch Converter

Use this tool to convert a calendar Date & Time into Unix epoch time. It supports seconds, milliseconds, microseconds, and nanoseconds.

How to Use

1. Date & Time
   Click the field or the calendar icon and select a date and time.
   You can also type manually: YYYY-MM-DD HH:mm:ss (or use your locale format).
2. Timezone
   Choose how to interpret the date/time you picked:
   • Local Time — Uses your system timezone (e.g., Australia/Sydney).
   • Specific Zone — Pick a zone like UTC, Europe/London, etc.
   The same clock time represents a different instant if you change the timezone (offsets differ).
3. Epoch Time
   After selecting a valid date/time, the converter shows:
   • Seconds since 1970-01-01 00:00:00 UTC
   • Milliseconds (13 digits)
   • Microseconds (16 digits)
   • Nanoseconds (19 digits)
   Values are auto-calculated from the exact instant your input represents in the chosen timezone.

Examples

• 2025-09-16 13:45:30 in UTC → Epoch seconds: ...
• The same clock time in Australia/Sydney will yield a different epoch because of the offset.

Notes

• DST aware: The converter applies daylight-saving rules for the selected timezone.
• Formatting: Input can be typed or picked via the calendar. If typing, include the time (e.g., 2025-09-16 13:45) for precise results.
• Copying: Use the copy button (if available) to copy any epoch value.

Troubleshooting

• If the epoch doesn’t appear, make sure the Date & Time field is valid and a timezone is selected.
• Avoid ambiguous clock times around DST transitions; prefer UTC for exact reproducibility.