Date Period Calculator
Calculate the period between start and end dates. Displays days, weeks, months, and years.
Dates
Enter 8 digits or use calendar button
Enter 8 digits or use calendar button
About this tool
The Period Calculator measures the duration between two dates and presents it as days, weeks, months, and full years. It runs entirely in your browser, so the dates you enter never leave your device.
Common use cases
- Track project length from kickoff to delivery for status reports or invoicing.
- Calculate length of service or tenure for HR records and resumes.
- Plan around due dates, anniversaries, or contract renewal windows.
- Audit subscription cycles or warranty periods that span multiple years.