Time Duration & Business Days Calculator
Calculate exact intervals, working business days, and future date offsets.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
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.
How to Use Time Duration & Business Days Calculator
Select Date Difference or Add/Subtract Time.
Select your starting and ending date/time values.
Inspect total days, business days, hours, and full ISO 8601 formatting.
Frequently Asked Questions
How are business days calculated?
The calculator excludes Saturdays and Sundays between the start and end dates.
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