Free tool
IST to GMT converter
Convert India Standard Time to Greenwich Mean Time. Right now, London is 4 hours and 30 minutes behind Mumbai.
1 — Pick two places
Right now
2 — Convert a specific time
5:30 AM in London
| Mumbai (IST) | London (GMT) |
|---|---|
| 9:00 AM | 4:30 AM |
| 12:00 PM | 7:30 AM |
| 5:00 PM | 12:30 PM |
Current offsets: IST GMT+5:30 · GMT GMT+1. Updated hourly.
Booking a call between Mumbai and London? Skip the conversion entirely — share a Calenkli link and each person picks a slot in their own time zone automatically.
Try it freeFrequently asked questions
What is the time difference between Mumbai and London?
Right now, London (GMT) is 4 hours and 30 minutes behind Mumbai (IST). The exact gap can shift by an hour around daylight-saving changes, and this converter always uses the correct offset for the date.
How do I convert IST to GMT?
Take the IST time and subtract 4h 30m to get GMT. Or just use the converter above — set the hour and read the London time instantly.
Is IST ahead of or behind GMT?
GMT is 4 hours and 30 minutes behind IST right now.
Turn time into booked meetings
Calenkli gives you a free booking link: people pick a slot in their own time zone, answer your questions first, and the meeting lands on your calendar automatically.
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