India Standard Time to Greenwich Mean Time
Convert times between India Standard Time (IST, UTC+5:30) and Greenwich Mean Time (GMT, UTC+0:00). Greenwich Mean Time is 5.5 hours behind India Standard Time in standard time. During daylight saving time this difference changes to 4.5 hours.
UTC+5:30→UTC+0:00 / +1:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| India Standard Time | IST | UTC+5:30 | — | India |
| Greenwich Mean Time | GMT / BST | UTC+0:00 | UTC+1:00 | United Kingdom |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (IST → GMT)
| India Standard Time | Greenwich Mean Time |
|---|---|
| 12:00 AM IST | 6.5:00 PM (prev day) GMT |
| 6:00 AM IST | 0.5:00 AM GMT |
| 9:00 AM IST | 3.5:00 AM GMT |
| 12:00 PM IST | 6.5:00 AM GMT |
| 3:00 PM IST | 9.5:00 AM GMT |
| 6:00 PM IST | 0.5:00 PM GMT |
| 9:00 PM IST | 3.5:00 PM GMT |
Summer (DST) Conversion (IST → BST)
| India Standard Time (summer) | Greenwich Mean Time (summer) |
|---|---|
| 12:00 AM IST | 7.5:00 PM (prev day) BST |
| 6:00 AM IST | 1.5:00 AM BST |
| 9:00 AM IST | 4.5:00 AM BST |
| 12:00 PM IST | 7.5:00 AM BST |
| 3:00 PM IST | 10.5:00 AM BST |
| 6:00 PM IST | 1.5:00 PM BST |
| 9:00 PM IST | 4.5:00 PM BST |
Daylight Saving Time (DST) Notes
- Greenwich Mean Time observes DST. Clocks advance 1 hour to BST (UTC+1:00) roughly from month 3 to 10.
- The offset difference shifts between 5.5h (standard) and 4.5h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert IST to GMT?
Add (-5.5) hours to the IST time to get GMT. For example, 9:00 AM IST = 3.5:00 AM GMT.
What is the current UTC offset for India Standard Time?
India Standard Time is always UTC+5:30 (IST) — it does not observe DST.
Is Greenwich Mean Time ahead or behind India Standard Time?
Greenwich Mean Time is 5.5 hours behind India Standard Time in standard time.
When is a good time to schedule a meeting between IST and GMT?
Due to the 5.5-hour difference, business-hours overlap may be limited. Use the live timezone converter to find a mutually convenient time.
Related Timezone Conversions
India Standard Time → Central European TimeIST / CETIndia Standard Time → Eastern European TimeIST / EETIndia Standard Time → Moscow TimeIST / MSKIndia Standard Time → Turkey TimeIST / TRTIndia Standard Time → Pakistan Standard TimeIST / PKTIndia Standard Time → Bangladesh Standard TimeIST / BSTIndia Standard Time → US Eastern TimeIST / ESTIndia Standard Time → China Standard TimeIST / CST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.