Calculate the exact duration and time span between two Unix epoch timestamps.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Type an epoch timestamp in seconds or click Set Current Time.
Type the second epoch timestamp.
Review the human readable duration, total days, hours, and seconds.
This tool accepts standard 10-digit Unix timestamps in seconds.
Yes, it breaks down the exact difference into years, days, hours, minutes, and seconds.
Zero-egress companion tools in the Date & Time suite
Convert times across world timezones and compute exact business days.
Convert between Unix timestamps and human-readable UTC/ISO dates.
Calculate exact intervals, working business days, and future date offsets.
Calculate calendar and custom fiscal year quarters starting in any month (e.g. Feb, July, Oct).
