Real-time conversion
Handles daylight saving
No data sent anywhere
Free, always
The time difference is 5 hours 30 minutes IST is ahead.
| GMT (London) | IST (New Delhi) |
|---|---|
| 9:00 AM GMT | 2:30 PM IST |
| 11:00 AM GMT | 4:30 PM IST |
| 3:00 PM GMT | 8:30 PM IST |
Enter or select a time in GMT (London)
The tool instantly calculates the corresponding IST (New Delhi) time
Copy the result or adjust the input for other times
No registration or installation required — everything runs in your browser
The standard time difference between GMT and IST is 5 hours 30 minutes, with IST ahead.
Note: During daylight saving time transitions, the difference may temporarily differ by an hour. Times automatically adjust based on the date and applicable time zone rules from the IANA Time Zone Database.
IST is 5 hours 30 minutes ahead of GMT, shifting by an hour around daylight-saving changes. 100% free, no registration, and fully private — every conversion happens in your browser.
Uses the IANA database for Europe/London and Asia/Kolkata, so daylight saving is applied automatically — no manual offset math.
Convert GMT to IST the moment you pick a time. No signup, no ads in your way, nothing to install.
Find the London ↔ Mumbai overlap fast — both cities are in business hours roughly 9:00 AM–11:30 AM GMT.
Every conversion runs locally in your browser using your device clock. Your dates and times never touch a server.
Reverse conversion
From Greenwich Mean Time
From Greenwich Mean Time
From Greenwich Mean Time
From Greenwich Mean Time
From Greenwich Mean Time
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