D-day Calculator
Days Until or Since
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Date Difference Calculator
Compare elapsed days between dates with the count including both dates.
Processed on your device · No file uploads
Your selected files and results are processed on this device. They are not sent to external servers or stored on our servers.
How processing works- 01Select input
- 02Process locally
- 03Review & save
Loading the tool. JavaScript is required.
Example input & result
Input & settings
2024-02-28 → 2024-03-01
Expected result
2 elapsed days · 3 inclusive days
Calendar days include leap days, weekends and holidays. This is not a business-day calculator.
How to use Date Difference Calculator
- 01Choose input values or files.
- 02Check settings and select Calculate or Run.
- 03Review the result and limitations, then save if needed.
Frequently asked questions
Are inputs stored on a server?
No. Inputs and results are processed on-device without uploading or storing them with the operator.
What does this tool do?
Compare elapsed days between dates with the count including both dates.
What is an example result?
2024-02-28 → 2024-03-01 → 2 elapsed days · 3 inclusive days
What are the limits and assumptions?
Calendar days include leap days, weekends and holidays. This is not a business-day calculator.
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