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Time Calculator
Calculate time differences, add or subtract hours and minutes, and convert between time zones. Free time calculator for all your time calculations.
💡Did You Know?
- • A day has exactly 1,440 minutes (24 × 60)
- • UTC is the world time standard (no daylight saving)
- • China uses single time zone despite 5 geographic zones
- • Some zones have 30-minute offsets (e.g., India UTC+5:30)
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✨ Key Features
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Time Difference
Calculate duration between times
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Add/Subtract
Find future or past times
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Time Zones
20+ cities worldwide
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Quick Actions
Now, presets, copy results
How to Use the Time Calculator
Our time calculator offers three modes: Time Difference, Add/Subtract, and Time Zones. Select your mode and enter times to see instant results.
Calculate Time Difference
Enter start and end times to calculate exact duration. Results show in hours:minutes, total hours, and decimal format. Automatically handles overnight periods.
Add or Subtract Time
Start with any base time, then add or subtract hours and minutes to find a new time. Perfect for calculating meeting end times or scheduling appointments.