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Unix Timestamp & Epoch Tools

Timestamp Unit Converter

Convert integer epoch values locally between common Unix timestamp units with exact BigInt arithmetic.

—Seconds
—Milliseconds
—Microseconds
—Nanoseconds

Unix/POSIX time is based on seconds since the 1970-01-01 UTC epoch. Browser date rendering uses JavaScript Date/Intl; sub-millisecond epoch arithmetic is preserved with BigInt where the tool exposes it.

How to use this Timestamp Unit Converter

Convert Unix timestamp values between seconds, milliseconds, microseconds, and nanoseconds. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.