Timezone conversion
BST to IST Time — Convert British Summer Time to India Standard Time
IST is currently 4 hours and 30 minutes ahead of BST. The gap shifts across the year: around January IST is 5 hours and 30 minutes ahead of BST, and around July it is 4 hours and 30 minutes ahead of BST, because one or both zones observe daylight saving.
IST is currently 4 hours and 30 minutes ahead of BST.
Abbreviation disambiguation
On Clockjumper, BST refers to British Summer Time (UTC+1), the UK's daylight-saving offset. The same letters are also used locally for Bangladesh Standard Time (UTC+6) — check the city or UTC offset to be sure which is meant.
On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.
Interactive converter
12:00PM
Select both cities to see the converted time.
Full BST to IST conversion table
| BST | IST |
|---|---|
| 12:00 AM | 4:30 AM |
| 1:00 AM | 5:30 AM |
| 2:00 AM | 6:30 AM |
| 3:00 AM | 7:30 AM |
| 4:00 AM | 8:30 AM |
| 5:00 AM | 9:30 AM |
| 6:00 AM | 10:30 AM |
| 7:00 AM | 11:30 AM |
| 8:00 AM | 12:30 PM |
| 9:00 AM | 1:30 PM |
| 10:00 AM | 2:30 PM |
| 11:00 AM | 3:30 PM |
| 12:00 PM | 4:30 PM |
| 1:00 PM | 5:30 PM |
| 2:00 PM | 6:30 PM |
| 3:00 PM | 7:30 PM |
| 4:00 PM | 8:30 PM |
| 5:00 PM | 9:30 PM |
| 6:00 PM | 10:30 PM |
| 7:00 PM | 11:30 PM |
| 8:00 PM | 12:30 AM(next day) |
| 9:00 PM | 1:30 AM(next day) |
| 10:00 PM | 2:30 AM(next day) |
| 11:00 PM | 3:30 AM(next day) |
Daylight saving and how the gap changes
Around January IST is 5 hours and 30 minutes ahead of BST. Around July it is 4 hours and 30 minutes ahead of BST. 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 IST ahead of or behind BST right now?
- IST is currently 4 hours and 30 minutes ahead of BST.
- What is the current BST to IST time difference?
- Right now the gap is 4 hours and 30 minutes — IST is 4 hours and 30 minutes ahead of BST.
- Does the BST → IST offset change during the year?
- Yes. Around January IST is 5 hours and 30 minutes ahead of BST; around July it is 4 hours and 30 minutes ahead of BST. The converter above always reflects the correct offset for the date you pick.
- Does BST observe daylight saving time?
- BST is itself the daylight-saving form. British Summer Time is in force at UTC+1 through the summer months; outside that window the same zone is on GMT (UTC+0).
- Does IST observe daylight saving time?
- No — India Standard Time stays at a fixed UTC offset year-round.
- What time is 3 AM BST in IST?
- 3:00 AM BST is 7:30 AM IST.
- What time is 8 AM BST in IST?
- 8:00 AM BST is 12:30 PM IST.
- What time is 9 AM BST in IST?
- 9:00 AM BST is 1:30 PM IST.
- What time is 10 AM BST in IST?
- 10:00 AM BST is 2:30 PM IST.
- What time is 11 AM BST in IST?
- 11:00 AM BST is 3:30 PM IST.
- What time is 12 PM (noon) BST in IST?
- 12:00 PM BST is 4:30 PM IST.
- What time is 2 PM BST in IST?
- 2:00 PM BST is 6:30 PM IST.
- What time is 3 PM BST in IST?
- 3:00 PM BST is 7:30 PM IST.
- What time is 4 PM BST in IST?
- 4:00 PM BST is 8:30 PM IST.
- What time is 5 PM BST in IST?
- 5:00 PM BST is 9:30 PM IST.
- What time is 9 PM BST in IST?
- 9:00 PM BST is 1:30 AM (next day) IST.
- What time is 10 PM BST in IST?
- 10:00 PM BST is 2:30 AM (next day) IST.
- When is the best time to schedule a call between BST and IST?
- The working-hours overlap (09:00–17:00 in both zones) runs roughly 9:00 AM – 12:30 PM BST (≈ 3 hours and 30 minutes). The midpoint of that window — 10:45 AM BST, 3:15 PM IST — is the safest single slot to propose for a live call.
- What time zone does BST refer to?
- BST refers to British Summer Time (IANA: Europe/London).
- What time zone does IST refer to?
- IST refers to India Standard Time (IANA: Asia/Kolkata).
- Is BST on this page the same as other zones that share the letters "BST"?
- On Clockjumper, BST refers to British Summer Time (UTC+1), the UK's daylight-saving offset. The same letters are also used locally for Bangladesh Standard Time (UTC+6) — check the city or UTC offset to be sure which is meant.
- Is IST on this page the same as other zones that share the letters "IST"?
- On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.