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Free Unix timestamp and epoch converter. Convert epoch to time, convert Unix epoch to date, and convert date-time back to epoch in seconds or milliseconds.
Unix epoch time (also known as Unix time, Unix timestamp, POSIX time, seconds since the epoch) is a system for describing a point in time.
It is the number of seconds that have elapsed since the unix epoch, minus leap seconds; the unix epoch is 00:00:00 UTC on 1 January 1970 (an arbitrary date); leap seconds are ignored,with a leap second having the same unix time as the second before it, and every day is treated as if it contains exactly 86400 seconds. due to this treatment unix time is not a true representation of UTC.
| Human Readable Time | Seconds |
|---|---|
| 1 Minute | 60 Seconds |
| 1 Hour | 3600 Seconds |
| 1 Day | 86400 Seconds |
| 1 Week | 604800 Seconds |
| 1 Year (365 Day) | 31536000 Seconds |
Our Unix timestamp converter is designed for common tasks like "convert epoch to time" and "convert Unix epoch to date". You can convert between Unix timestamps and human-readable date formats in seconds or milliseconds.
For dedicated workflows, use Epoch to Date Converter to convert epoch to time and convert Unix epoch to date. You can also use Date Format Converter for cross-format date and epoch conversion.
For multiple conversions, use our batch conversion tools. Simply enter one timestamp or date per line, select the appropriate options, and click "Convert" to process them all at once.
A Unix timestamp represents the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC (the Unix Epoch). It is a standardized way to represent a specific point in time regardless of timezone or locale.
Unix timestamps are widely used in programming and databases because they are efficient to store (as a single number), easy to compare, and independent of time zones and daylight saving time changes. They provide a universal reference for time across different systems.
The standard Unix timestamp counts seconds since the Unix Epoch. However, for applications requiring greater precision, millisecond timestamps are used, which are 1000 times larger than the standard second-based timestamp (e.g., 1622505600000 instead of 1622505600).
Dates before January 1, 1970, are represented as negative Unix timestamps. For example, December 31, 1969, at 23:59:59 UTC would be -1 second from the Unix Epoch.
The 32-bit Unix timestamp will overflow on January 19, 2038 (known as the "Year 2038 problem"). However, most modern systems use 64-bit timestamps, which will not overflow for billions of years.
Unix timestamps are utilized across various applications and domains:
Core tools, blog pages, and locale entry points expose canonical, hreflang, and sitemap signals.
Tool and blog pages include author details, editorial context, and a recent review timestamp.
Guides link back to relevant tools, while tool pages include FAQs, explainers, and developer resources.
UnixEpoch.net focuses on developer, analyst, and operations workflows around timestamp conversion, timezone coordination, date troubleshooting, and API debugging. Pages pair tool functionality with practical usage guidance and review metadata.
Check whether an incoming epoch value is in seconds or milliseconds and compare UTC and local output immediately.
Combine timezone conversion, overlap planning, and date conversion in one workflow.
Reduce manual conversion mistakes when updating schemas, verifying historical data, or writing migration scripts.
Reviewed by Unix timestamp and API debugging specialists
Optimized for timestamp debugging, API payload inspection, event stream validation, and data engineering time workflows.