Time Between Calculator
Calculate time precisely
Find the exact duration between any two dates and times down to the millisecond.
Start Date
End Date
Time Difference
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.
Measure time accurately
Our calculator gives you precise time differences
Enter Dates
Input your start and end dates with optional times.
Calculate
Get instant results showing the exact duration.
View Results
See the difference in multiple formats and units.
Perfect for precision
Calculate durations for any purpose
Age Calculator
Find exact age down to seconds
Project Planning
Calculate project durations
Event Countdown
Know exactly how long until events
Historical Dates
Time since historical events
10M+
Monthly Users
Worldwide
50M+
Alarms Set
And counting
100%
Free Forever
No hidden costs
4.9
User Rating
Loved by millions
Join millions of users who rely on Clockii every day
Ready to take control of your time?
Explore all our free time management tools and boost your productivity today