30 Minute Calculator
Plan reminders, cooking timers, or meeting buffers exactly 30 minutes away.
Start: Tuesday, November 25, 2025 at 11:49 AM
30 minutes later: Tuesday, November 25, 2025 at 12:19 PM
Difference from now: 29 minute(s) from now
How to Use This Calculator
Select the starting timestamp
Enter the exact date and time from which to add or subtract 30 minutes.
Choose direction
Leave unchecked to add 30 minutes; check to subtract.
Set reminders or notes
Transfer the resulting time into your calendar, reminder, or to-do list.
Formula
Target Time = Start Time ± 30 minutes
Target Timestamp = Start Timestamp ± (30 × 60 × 1000 ms)
Example: 2025-11-09 14:10 + 30 min → 2025-11-09 14:40 local time.
30-Minute Use Cases
- Stack back-to-back meetings with 30-minute breaks.
- Run Pomodoro-style focus sessions (25 + 5 break) rounding to 30 minutes.
- Time baking, laundry cycles, or transit buffers.
- Check when your parking meter or break ends.
Frequently Asked Questions
Does this adjust for daylight saving changes?
Yes—the calculation uses actual timestamps, so DST shifts are handled without manual adjustments.
Can I add multiple 30-minute blocks?
Run the tool repeatedly or use our Add Time Calculator for larger custom additions.
What if I need notifications?
Copy the output into your calendar or reminder app to receive alerts.
Does it work offline?
The page runs entirely in your browser—no server connection needed once loaded.