Date Calculator - Calculate Date Difference & Add/Subtract Days

Date Calculator 📅

Calculate the difference between two dates or add/subtract days, months, or years. Perfect for planning, deadlines, and scheduling!

Start Date

End Date

Base Date

Add/Subtract

What is Date Calculator?

This free online tool helps you calculate the difference between two dates or add/subtract days, months, or years to a date. It's perfect for planning, deadlines, and scheduling.

How to Use Date Calculator?

To find the difference between two dates, enter both dates and click "Calculate Difference".
To add or subtract time, enter a base date, value, and unit, then click "Add/Subtract".
Results will appear instantly below each section.

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Why Use This Date Calculator?

Calculate the difference between two dates in days, weeks, months, and years.
Add or subtract days, months, or years to any date.
Perfect for planning, deadlines, and scheduling.
Free, fast, and works offline.

FAQ

Is this date calculator free?

Yes! This tool is 100% free and works instantly in your browser.

Does it save my dates?

No, your data is processed locally and never sent to any server.

Can I use it offline?

Yes, once loaded, this tool works completely offline.

What formats are supported?

All standard date formats supported by your browser are accepted.