🕐 Epoch Calculator
Professional epoch timestamp converter for developers, system administrators, and data analysts. Convert between Unix epoch time and human-readable dates with support for seconds/milliseconds, multiple timezones, and various date formats.
How to Use This Epoch Calculator
How to Use the Epoch Calculator:
- Choose conversion mode: Timestamp to Date or Date to Timestamp
- For timestamp conversion: Enter the Unix timestamp (automatically detects seconds/milliseconds)
- For date conversion: Select the date and optionally the time
- Choose your preferred timezone (defaults to UTC)
- Select the output format and precision options
- View results with multiple format options and relative time
- Copy results to clipboard or download for documentation
Pro Tips: Use "Current Timestamp" to get the current Unix time, enable "Show Relative Time" to see time differences, and use batch mode for converting multiple timestamps!
How It Works
Understanding Unix Epoch Time:
Unix epoch time represents the number of seconds (or milliseconds) elapsed since January 1, 1970, 00:00:00 UTC. Here's how conversion works:
- Timestamp Detection: Automatically identifies seconds (10 digits) vs milliseconds (13 digits)
- Base Conversion: Converts epoch time to JavaScript Date object for processing
- Timezone Adjustment: Applies timezone offset for accurate local time display
- Format Generation: Outputs multiple formats (ISO 8601, RFC 2822, localized)
- Relative Time: Calculates human-friendly relative timestamps
Common Timestamp Ranges:
- 10 digits (seconds): 1640995200 = January 1, 2022
- 13 digits (milliseconds): 1640995200000 = January 1, 2022
- Current time: Updates in real-time for testing and development
When You Might Need This
- • Convert Unix timestamps from server logs to readable dates
- • Debug API responses containing timestamp data
- • Analyze database records with epoch time fields
- • System administration and log file analysis
- • Database migration and timestamp standardization
Frequently Asked Questions
What is Unix epoch time and how does it work?
Unix epoch time is the number of seconds (or milliseconds) that have elapsed since January 1, 1970, 00:00:00 UTC. It's a standard way to represent time in computing systems, making it easy to store, compare, and calculate time differences across different systems and timezones.
How do I know if my timestamp is in seconds or milliseconds?
Timestamps with 10 digits are typically in seconds (e.g., 1642780800), while timestamps with 13 digits are in milliseconds (e.g., 1642780800000). Our calculator automatically detects the format, but you can also manually specify the format for accuracy.
Can this calculator handle different timezones?
Yes! Our epoch calculator supports timezone conversion and displays results in UTC, local time, and any specified timezone. This is essential when working with distributed systems or analyzing logs from servers in different regions.
Is this tool accurate for historical dates and future timestamps?
Absolutely. The calculator accurately handles dates from January 1, 1970 (Unix epoch start) to far future dates, including leap years, leap seconds, and timezone changes. It's suitable for both historical data analysis and future event scheduling.