Date Calculator
Add or subtract time
Calculate future or past dates by adding or subtracting days, weeks, months, or years.
Starting Date
Add or Subtract Time
Why use our tools
Free, fast, and reliable time management tools right in your browser
100% Free
No signup, no credit card, no hidden fees. Just open and use.
Works Offline
Once loaded, our tools work even without an internet connection.
No Downloads
Everything runs in your browser. No apps to install or update.
Mobile Friendly
Works perfectly on phones, tablets, and desktops.
Custom Sounds
Choose from built-in sounds or use YouTube videos as alarms.
Privacy First
Your data stays in your browser. We don't track your timers.
Calculate dates instantly
Simple and powerful date arithmetic
Pick a Date
Start with any date as your base.
Add or Subtract
Enter the amount of time to add or subtract.
Get Results
See the calculated date instantly.
Perfect for planning
Calculate important dates with ease
Due Dates
Calculate project deadlines
Renewals
Find subscription renewal dates
Events
Plan events and appointments
Contracts
Calculate contract end dates
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