How to Use the Deadline Calculator

  1. Enter your input values using the fields in the calculator above
  2. Select any additional options (units, format, timezone) if applicable
  3. Click the Calculate button to get your instant result
  4. Copy the result using the Copy button for use elsewhere
  5. Scroll down for real-world examples and explanations
๐Ÿ‡ฑ๐Ÿ‡ฐ Sri Lanka configuration: Timezone set to Asia/Colombo ยท Date format DD/MM/YYYY ยท Language SI

About the Deadline Calculator

Calculates a project or legal deadline by adding business days to a start date. This tool uses the proleptic Gregorian calendar and the IANA timezone database for accurate results across all dates, timezones, and leap years.

All formulas validated by Vipul Jaganiya, Computer Science expert in Calendar Mathematics and Timezone Engineering.