Convert time from GMT to IST. Enter any time to see the equivalent IST time, compare current GMT and IST times side by side, and find overlapping business hours for calls and meetings.
Use this GMT to IST converter to compare United Kingdom and India time, check the 5 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM GMT / 2:30 PM IST.
Converting between Greenwich Mean Time and India Standard Time means accounting for a 5 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Greenwich Mean Time (UTC +0) that you want to convert. Hit "Now" to load the current gmt time instantly, or use "+1h" to step forward and compare.
The equivalent India Standard Time (UTC +5:30) time appears immediately. Since ist is 5 hours and 30 minutes ahead of gmt, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the ist result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
When someone in United Kingdom suggests 9:00 AM gmt, that's 2:30 PM ist. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night gmt times can land on a different date in ist because of the 5 hours and 30 minutes offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
The half-hour offset between gmt (UTC +0) and ist (UTC +5:30) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.
Product launches, sports matches, and webinars are often announced in gmt. Convert the event time to ist so you know exactly when to tune in — with a 5 hours and 30 minutes difference, a morning event in United Kingdom falls during work hours in India.
Quick-reference conversion table covering every hour of the day at a glance.
Greenwich Mean Time to India Standard Time full day schedule
| Greenwich Mean Time | India Standard Time |
|---|---|
| 12:00 AM |
5:30 AM
|
| 1:00 AM |
6:30 AM
|
| 2:00 AM |
7:30 AM
|
| 3:00 AM |
8:30 AM
|
| 4:00 AM |
9:30 AM
|
| 5:00 AM |
10:30 AM
|
| 6:00 AM |
11:30 AM
|
| 7:00 AM |
12:30 PM
|
| 8:00 AM |
1:30 PM
|
| 9:00 AM |
2:30 PM
|
| 10:00 AM |
3:30 PM
|
| 11:00 AM |
4:30 PM
|
| 12:00 PM |
5:30 PM
|
| 1:00 PM |
6:30 PM
|
| 2:00 PM |
7:30 PM
|
| 3:00 PM |
8:30 PM
|
| 4:00 PM |
9:30 PM
|
| 5:00 PM |
10:30 PM
|
| 6:00 PM |
11:30 PM
|
| 7:00 PM |
12:30 AM
(next day)
|
| 8:00 PM |
1:30 AM
(next day)
|
| 9:00 PM |
2:30 AM
(next day)
|
| 10:00 PM |
3:30 AM
(next day)
|
| 11:00 PM |
4:30 AM
(next day)
|
GMT is 5.5 h behind IST (4.5 h during BST). Two clean overlap windows: 8:30-11 AM GMT (2-4:30 PM IST — early UK morning catches mid-IST afternoon) and 1-4 PM GMT (6:30-9:30 PM IST — late UK afternoon catches early IST evening). London-Mumbai / London-Bengaluru corridors dominate here — global banking operations, big-4 audit engagements, and legal-services BPO.
UK / Ireland / Iceland / Portugal / West Africa. Business hours 9 AM – 5:30 PM GMT typically. Note: London is on GMT in winter, BST (GMT+1) in summer — but "GMT" gets used loosely all year in scheduling contexts. Financial-services London anchors the European trading day.
Indian business hours run 10 AM – 7 PM IST typically; IT / BPO shifts commonly extend to cover US and UK working hours, so 3:30 PM – 12:30 AM IST (US overlap) and 12:30 PM – 9 PM IST (UK overlap) are the two second shifts you see most often. Weekend is Saturday-Sunday for most private-sector employers.
Time gap: IST is 5.5 hours ahead of GMT (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).
Explore more gmt conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Find the time difference from any major zone into India Standard Time. Use these pages when scheduling with India from a different region.
