IST to BMT Converter
Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
IST and BMT examples
These examples always use IST (UTC+5:30) and BMT (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IST is 4 hours and 30 minutes ahead of BMT.
How the time difference changes
IST is 4 hours and 30 minutes ahead of BMT year-round.
Working hours of 9:00 am to 5:00 pm in IST correspond to 4:30 am to 12:30 pm in BMT.
Compare IST time with BMT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Standard Time is 4 hours and 30 minutes ahead of Biel Mean Time
5:30 pm17:30 in IST is 1:00 pm13:00 in BMT
IST to BMT call time
Best time for a conference call or a meeting is between 1:30pm-5pm in IST which corresponds to 9am-12:30pm in BMT
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
1:00 pm13:00 Biel Mean Time (BMT). Offset UTC +1:00 hour
5:30 pm17:30 IST / 1:00 pm13:00 BMT
| IST | BMT |
|---|---|
| 12am (midnight) | 7:30 pm |
| 1am | 8:30 pm |
| 2am | 9:30 pm |
| 3am | 10:30 pm |
| 4am | 11:30 pm |
| 5am | 12:30 am |
| 6am | 1:30 am |
| 7am | 2:30 am |
| 8am | 3:30 am |
| 9am | 4:30 am |
| 10am | 5:30 am |
| 11am | 6:30 am |
| 12pm (noon) | 7:30 am |
| 1pm | 8:30 am |
| 2pm | 9:30 am |
| 3pm | 10:30 am |
| 4pm | 11:30 am |
| 5pm | 12:30 pm |
| 6pm | 1:30 pm |
| 7pm | 2:30 pm |
| 8pm | 3:30 pm |
| 9pm | 4:30 pm |
| 10pm | 5:30 pm |
| 11pm | 6:30 pm |
| 00:00 | 19:30 |
| 01:00 | 20:30 |
| 02:00 | 21:30 |
| 03:00 | 22:30 |
| 04:00 | 23:30 |
| 05:00 | 00:30 |
| 06:00 | 01:30 |
| 07:00 | 02:30 |
| 08:00 | 03:30 |
| 09:00 | 04:30 |
| 10:00 | 05:30 |
| 11:00 | 06:30 |
| 12:00 | 07:30 |
| 13:00 | 08:30 |
| 14:00 | 09:30 |
| 15:00 | 10:30 |
| 16:00 | 11:30 |
| 17:00 | 12:30 |
| 18:00 | 13:30 |
| 19:00 | 14:30 |
| 20:00 | 15:30 |
| 21:00 | 16:30 |
| 22:00 | 17:30 |
| 23:00 | 18:30 |
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Chennai, Kolkata.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
Biel Mean Time
Offset: BMT is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Algeria, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Tunisia, Vatican City
Principal Cities: The largest city in the BMT time zone is Berlin in Germany, with about 3.426 million people. Other major cities in this time zone include Madrid, Algiers, Rome, Paris.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central European Summer Time (CEST).
Start: Biel Mean Time (BMT) started on Sunday, October 26, 2025 at 3:00 am local time and clocks were set one hour back to Sunday, October 26, 2025, 2:00 am. Standard time starts annually on the last Sunday of October.
End: Biel Mean Time (BMT) ends on Sunday, March 29, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 29, 2026, 3:00 am local daylight time instead. Standard time ends annually on the last Sunday of March.
BMT representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BMT
- A - short form of 'Alpha'
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time