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IST to GMT Time Converter

Convert time from IST to GMT. Enter any time to see the equivalent GMT time, compare current IST and GMT times side by side, and find overlapping business hours for calls and meetings.

ist India Standard Time
...
gmt Greenwich Mean Time
...
Select a time to convert

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.

Time Difference
Greenwich Mean Time is 5 hours and 30 minutes behind India Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 3:00 PM ist and 9:30 AM gmt.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

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.

Enter Your ist Time

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.

Read the gmt Result

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.

Copy or Fine-Tune

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

Align ist–gmt Meetings Instantly

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.

Spot Date-Line Shifts at a Glance

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.

Handles DST Transitions Automatically

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.

Never Miss a ist-Timed Event

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 United Kingdom.

ist to gmt Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

India Standard Time to Greenwich Mean Time full day schedule

12:00 AM
ist
→
6:30 PM
gmt
(previous day)
1:00 AM
ist
→
7:30 PM
gmt
(previous day)
2:00 AM
ist
→
8:30 PM
gmt
(previous day)
3:00 AM
ist
→
9:30 PM
gmt
(previous day)
4:00 AM
ist
→
10:30 PM
gmt
(previous day)
5:00 AM
ist
→
11:30 PM
gmt
(previous day)
6:00 AM
ist
→
12:30 AM
gmt
7:00 AM
ist
→
1:30 AM
gmt
8:00 AM
ist
→
2:30 AM
gmt
9:00 AM
ist
→
3:30 AM
gmt
10:00 AM
ist
→
4:30 AM
gmt
11:00 AM
ist
→
5:30 AM
gmt
12:00 PM
ist
→
6:30 AM
gmt
1:00 PM
ist
→
7:30 AM
gmt
2:00 PM
ist
→
8:30 AM
gmt
3:00 PM
ist
→
9:30 AM
gmt
4:00 PM
ist
→
10:30 AM
gmt
5:00 PM
ist
→
11:30 AM
gmt
6:00 PM
ist
→
12:30 PM
gmt
7:00 PM
ist
→
1:30 PM
gmt
8:00 PM
ist
→
2:30 PM
gmt
9:00 PM
ist
→
3:30 PM
gmt
10:00 PM
ist
→
4:30 PM
gmt
11:00 PM
ist
→
5:30 PM
gmt
Business-hours overlap

India to UK — reverse of the London-Bengaluru corridor

Same 5.5 h gap (4.5 h in summer). IST-lead meetings scheduling UK counterparts work best 2-4 PM IST (8:30-10:30 AM GMT, early UK morning). Late-IST calls (6-8 PM IST = 12:30-2:30 PM GMT) hit UK working lunch — culturally fine but avoid the 1-2 PM slot which is genuinely lunch. Weekend note: India's Sat-Sun mostly aligns with UK Sat-Sun, but Indian corporate holidays (Republic Day, Independence Day, Diwali) don't map to anything on the UK calendar.

The two zones in context

IST vs GMT — cities and working rhythm

IST — India Standard Time
Primary cities: Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata

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.

GMT — Greenwich Mean Time
Primary cities: London, Dublin, Lisbon, Accra, Reykjavík

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.

Time gap: GMT is 5.5 hours behind IST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

Popular ist Time Converters

Explore more ist conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to gmt

Find the time difference from any major zone into Greenwich Mean Time. Use these pages when scheduling with United Kingdom from a different region.

🌍 Swap direction — GMT to IST Converter