Timezone Conversion Hub
IST to GMT Time Converter
Convert India Standard Time (IST) to Greenwich Mean Time (GMT). GMT is 5 hours and 30 minutes behind IST. Compare live clocks effortlessly.
Quick Answer: GMT (Greenwich Mean Time) is exactly 4 hours and 30 minutes behind IST (India Standard Time). When it is 12:00 PM (Noon) in IST, it is 7:30 AM in GMT. Optimal business overlap: 3.5 mutual working hours.
Source Timezone
UTC +5:30IST — India Standard Time
Saturday, October 10, 2026
21:50:41
IANA: Asia/KolkataDST: Fixed StandardKey Hub: India
Destination Timezone
UTC +1GMT — Greenwich Mean Time
Saturday, October 10, 2026
17:20:41
IANA: Europe/LondonDifferential: 4 hours 30 minutes behindKey Hub: United Kingdom
Instant Direction Toggle: Need to view the inverse time difference?
Convert GMT to IST insteadInteractive Multi-Zone Visual Grid
Hover or drag across the hours to align schedules, discover business overlaps, and click to schedule.
Interactive Multi–Zone Visual Grid
Hover or drag across the hours to align schedules, discover business overlaps, and click to schedule.
Find time together
Saturday, October 10, 2026
Business Hours (9am – 6pm)Shoulder HoursNight / SleepOverlap Window
Click any hour tile to select & schedule
Location & Timezone
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IST
India, Sri Lanka
• UTC +5:3009:50:41 PM
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GMT
United Kingdom, Ireland
• UTC +105:20:41 PM
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Saturday, October 10, 2026 • Selected Hour
04:00 PMIST11:30 AMGMT
Best International Meeting Overlap|Limited standard working overlap. Consider early morning or evening slots.
Quick Timezone Converter Selector
Jump to any of the 552 international timezone converter combinations in one click:
Complete 24-Hour Conversion Table: IST to GMT
Hour-by-hour cross-reference table for scheduling calls, webinars, and international broadcasts.
05:30 IST
01:00 GMT
06:30 IST
02:00 GMT
07:30 IST
03:00 GMT
08:30 IST
04:00 GMT
09:30 IST
05:00 GMT
10:30 IST
06:00 GMT
11:30 IST
07:00 GMT
12:30 IST
08:00 GMT
13:30 IST
09:00 GMT
14:30 IST
10:00 GMT
15:30 IST
11:00 GMT
16:30 IST
12:00 GMT
17:30 IST
13:00 GMT
18:30 IST
14:00 GMT
19:30 IST
15:00 GMT
20:30 IST
16:00 GMT
21:30 IST
17:00 GMT
22:30 IST
18:00 GMT
23:30 IST
19:00 GMT
24:30 IST
20:00 GMT
01:30 IST
21:00 GMT
02:30 IST
22:00 GMT
03:30 IST
23:00 GMT
04:30 IST
24:00 GMT
Popular IST Converters
Popular Converters to GMT
Quick Hourly Reference Table
IST to GMT Hourly Conversion Chart (IST vs GMT)
Instant hour-by-hour reference table for common meeting times, morning calls, and evening handoffs between IST (India Standard Time) and GMT (Greenwich Mean Time).
| IST Time (India Standard Time) | GMT Time (Greenwich Mean Time) |
|---|---|
| 8:00 AM IST | 3:30 AM GMT |
| 9:00 AM IST | 4:30 AM GMT |
| 10:00 AM IST | 5:30 AM GMT |
| 11:00 AM IST | 6:30 AM GMT |
| 12:00 PM IST | 7:30 AM GMT |
| 1:00 PM IST | 8:30 AM GMT |
| 2:00 PM IST | 9:30 AM GMT |
| 3:00 PM IST | 10:30 AM GMT |
| 4:00 PM IST | 11:30 AM GMT |
| 5:00 PM IST | 12:30 PM GMT |
| 6:00 PM IST | 1:30 PM GMT |
| 7:00 PM IST | 2:30 PM GMT |
| 8:00 PM IST | 3:30 PM GMT |
Verified Chronometric Analysis
India Standard to GMT Time Difference
Greenwich Mean Time (GMT) is 5 hours and 30 minutes behind India Standard Time (IST). For software development, legal, and financial teams in India coordinating with partners on GMT, afternoon hours provide the essential live touchpoint.
Use our 24-hour visual converter to compare matching hours, check live atomic clocks, and schedule calls without timezone errors.
Afternoon India Calls Catch Morning GMT
Compare reciprocal schedules, verify working hour alignments, and schedule with confidence.
Navigating Half-Hour Time Offsets
Compare reciprocal schedules, verify working hour alignments, and schedule with confidence.
Frequently Asked Questions: IST to GMT Time Conversion
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Google SERP Verified
GMT (Greenwich Mean Time, UTC+0) is exactly 5 hours and 30 minutes behind IST (India Standard Time, UTC+5:30).
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