Timezone conversion
BST to IST Time — Convert British Summer Time to India Standard Time
IST is currently 4h30m ahead of BST. The gap shifts across the year: around January it is 5h30m ahead of BST, and around July it is 4h30m ahead of BST, because one or both zones observe daylight saving.
IST is currently 4h30m ahead of BST.
Abbreviation disambiguation
BST here means British Summer Time. Note: collision: Bangladesh Standard Time (Asia/Dhaka)
IST here means India Standard Time. Note: major collisions: Israel Standard Time (Asia/Jerusalem), Irish Standard Time (Europe/Dublin) — canonical=India, page must disambiguate
Interactive converter
12:00PM
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 the BST → IST offset is 5h30m ahead of BST. Around July it is 4h30m 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 4h30m ahead of BST.
- What is the current BST to IST time difference?
- Right now the gap is 4h30m ahead — IST is 4h30m ahead of BST.
- Does the BST → IST offset change during the year?
- Yes. Around January the offset is 5h30m ahead of BST; around July it is 4h30m ahead of BST. The converter above always reflects the correct offset for the date you pick.
- Does BST observe daylight saving time?
- Yes — British Summer Time observes DST, so its UTC offset shifts by 1 hour(s) between winter and summer.
- Does IST observe daylight saving time?
- No — India Standard Time stays at a fixed UTC offset year-round.
- What time is 9 AM BST in IST?
- 9:00 AM BST is 1:30 PM IST.
- What time is 12 PM (noon) BST in IST?
- 12:00 PM BST is 4:30 PM IST.
- What time is 5 PM BST in IST?
- 5:00 PM BST is 9:30 PM 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 (≈ 3.5 hours). Mid-morning BST is usually the safest window 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 means British Summer Time. Disambiguation: collision: Bangladesh Standard Time (Asia/Dhaka)
- 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