Timezone conversion
IST to GMT Time — Convert India Standard Time to Greenwich Mean Time
GMT is currently 4h30m behind IST. The gap shifts across the year: around January it is 5h30m behind IST, and around July it is 4h30m behind IST, because one or both zones observe daylight saving.
GMT is currently 4h30m behind IST.
Abbreviation disambiguation
IST here means India Standard Time. Note: major collisions: Israel Standard Time (Asia/Jerusalem), Irish Standard Time (Europe/Dublin) — canonical=India, page must disambiguate
GMT here means Greenwich Mean Time. Note: equals UTC; UK winter time
Interactive converter
12:00PM
Full IST to GMT conversion table
| IST | GMT |
|---|---|
| 12:00 AM | 7:30 PM(previous day) |
| 1:00 AM | 8:30 PM(previous day) |
| 2:00 AM | 9:30 PM(previous day) |
| 3:00 AM | 10:30 PM(previous day) |
| 4:00 AM | 11:30 PM(previous day) |
| 5:00 AM | 12:30 AM |
| 6:00 AM | 1:30 AM |
| 7:00 AM | 2:30 AM |
| 8:00 AM | 3:30 AM |
| 9:00 AM | 4:30 AM |
| 10:00 AM | 5:30 AM |
| 11:00 AM | 6:30 AM |
| 12:00 PM | 7:30 AM |
| 1:00 PM | 8:30 AM |
| 2:00 PM | 9:30 AM |
| 3:00 PM | 10:30 AM |
| 4:00 PM | 11:30 AM |
| 5:00 PM | 12:30 PM |
| 6:00 PM | 1:30 PM |
| 7:00 PM | 2:30 PM |
| 8:00 PM | 3:30 PM |
| 9:00 PM | 4:30 PM |
| 10:00 PM | 5:30 PM |
| 11:00 PM | 6:30 PM |
Daylight saving and how the gap changes
Around January the IST → GMT offset is 5h30m behind IST. Around July it is 4h30m behind IST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.
Frequently asked questions
- Is GMT ahead of or behind IST right now?
- GMT is currently 4h30m behind IST.
- What is the current IST to GMT time difference?
- Right now the gap is 4h30m behind — GMT is 4h30m behind IST.
- Does the IST → GMT offset change during the year?
- Yes. Around January the offset is 5h30m behind IST; around July it is 4h30m behind IST. The converter above always reflects the correct offset for the date you pick.
- Does IST observe daylight saving time?
- No — India Standard Time stays at a fixed UTC offset year-round.
- Does GMT observe daylight saving time?
- Yes — Greenwich Mean Time observes DST, so its UTC offset shifts by 1 hour(s) between winter and summer.
- What time is 9 AM IST in GMT?
- 9:00 AM IST is 4:30 AM GMT.
- What time is 12 PM (noon) IST in GMT?
- 12:00 PM IST is 7:30 AM GMT.
- What time is 5 PM IST in GMT?
- 5:00 PM IST is 12:30 PM GMT.
- When is the best time to schedule a call between IST and GMT?
- The working-hours overlap (09:00–17:00 in both zones) runs roughly 1:30 PM – 5:00 PM IST (≈ 3.5 hours). Mid-morning IST is usually the safest window for a live call.
- What time zone does IST refer to?
- IST refers to India Standard Time (IANA: Asia/Kolkata).
- What time zone does GMT refer to?
- GMT refers to Greenwich Mean Time (IANA: Europe/London).
- Is IST on this page the same as other zones that share the letters "IST"?
- On Clockjumper, IST means India Standard Time. Disambiguation: major collisions: Israel Standard Time (Asia/Jerusalem), Irish Standard Time (Europe/Dublin) — canonical=India, page must disambiguate
- Is GMT on this page the same as other zones that share the letters "GMT"?
- On Clockjumper, GMT means Greenwich Mean Time. Disambiguation: equals UTC; UK winter time