IST to GMT Time Converter
Use this IST to GMT time converter to compare India and United Kingdom time instantly. GMT is 5 hours and 30 minutes behind IST, so 9:00 AM IST becomes 3:30 AM GMT and 5:00 PM IST becomes 11:30 AM GMT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
IST to GMT Quick Facts
Use this IST to GMT converter to compare India and United Kingdom time, check the 5 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 3:00 PM IST / 9:30 AM GMT.
How to Convert IST to GMT
Converting between India Standard Time and Greenwich Mean 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 India Standard Time (UTC +5:30) that you want to convert. Hit "Now" to load the current IST time instantly, or use "+1h" to step forward and compare.
The equivalent Greenwich Mean Time (UTC +0) time appears immediately. Since GMT is 5 hours and 30 minutes behind of IST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the GMT result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our IST to GMT Converter
When someone in India suggests 3:00 PM IST, that's 9:30 AM GMT. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night IST times can land on a different date in GMT 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 IST (UTC +5:30) and GMT (UTC +0) 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 IST. Convert the event time to GMT so you know exactly when to tune in — with a 5 hours and 30 minutes difference, a morning event in India falls during work hours in Universal.
IST to GMT Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
India Standard Time to Greenwich Mean Time full day schedule
| India Standard Time | Greenwich Mean Time |
|---|---|
| 12:00 AM |
6:30 PM
(previous day)
|
| 1:00 AM |
7:30 PM
(previous day)
|
| 2:00 AM |
8:30 PM
(previous day)
|
| 3:00 AM |
9:30 PM
(previous day)
|
| 4:00 AM |
10:30 PM
(previous day)
|
| 5:00 AM |
11:30 PM
(previous day)
|
| 6:00 AM |
12:30 AM
|
| 7:00 AM |
1:30 AM
|
| 8:00 AM |
2:30 AM
|
| 9:00 AM |
3:30 AM
|
| 10:00 AM |
4:30 AM
|
| 11:00 AM |
5:30 AM
|
| 12:00 PM |
6:30 AM
|
| 1:00 PM |
7:30 AM
|
| 2:00 PM |
8:30 AM
|
| 3:00 PM |
9:30 AM
|
| 4:00 PM |
10:30 AM
|
| 5:00 PM |
11:30 AM
|
| 6:00 PM |
12:30 PM
|
| 7:00 PM |
1:30 PM
|
| 8:00 PM |
2:30 PM
|
| 9:00 PM |
3:30 PM
|
| 10:00 PM |
4:30 PM
|
| 11:00 PM |
5:30 PM
|
IST to GMT Time Difference, Business Hours, and DST
IST to GMT is one of the more useful timezone conversions for calls, deadlines, and travel planning. The current gap is 5 hours and 30 minutes, which means 9:00 AM IST becomes 3:30 AM GMT and 2:00 PM IST becomes 8:30 AM GMT.
This matters when teams in Mumbai and London need to align business hours, webinars, or customer-support coverage. Use the chart on this page when you want the exact conversion for today instead of relying on manual offset math.
Daylight saving changes can also shift the gap during the year, so a converter is safer than memorizing a fixed difference. That is especially important for recurring meetings and date-sensitive handoffs.
Timezone offsets and DST rules verified against the IANA Time Zone Database. Conversion math and business-hour overlap windows double-checked against real-world scheduling scenarios.
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IST to GMT FAQ
Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between India Standard Time and Greenwich Mean Time.
What is the time difference between IST and GMT?
When can IST and GMT have business-hour overlap?
Does IST or GMT observe daylight saving time?
How do I quickly convert IST to GMT?
Why is GMT↔IST important for UK business?
What does the GMT-IST handoff window look like?
Does the GMT-IST gap shift?
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