IST to SGT
+2h 30mIST
ISTSOURCESGT
SGTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and SGT on the World Map
The map below highlights the IST (India Standard Time) and SGT (Singapore Standard Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
SGT – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
- •Singapore does not observe daylight saving time.
- •The Singapore Exchange (SGX) operates on SGT.
IST vs SGT: Offsets, DST and Best Call Times
IST runs on India Standard Time (IST) at UTC+05:30. SGT runs on Singapore Standard Time (SGT) at UTC+08:00. That puts IST 2 hours 30 minutes ahead of SGT — a difference of +2h 30m at the current offsets.
In practice, when it is 9:00 AM in IST it is 11:30 AM in SGT. Midnight in IST is 2:30 AM in SGT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IST to SGT time conversion table
| IST (IST) | SGT (SGT) | Day |
|---|---|---|
| 12:00 AM | 2:30 AM | same day |
| 6:00 AM | 8:30 AM | same day |
| 7:00 AM | 9:30 AM | same day |
| 8:00 AM | 10:30 AM | same day |
| 9:00 AM | 11:30 AM | same day |
| 12:00 PM | 2:30 PM | same day |
| 3:00 PM | 5:30 PM | same day |
| 5:00 PM | 7:30 PM | same day |
| 6:00 PM | 8:30 PM | same day |
| 9:00 PM | 11:30 PM | same day |
Why people convert IST to SGT time
- Scheduling a call from IST to SGT: a 10:00 AM start in IST lands at 12:30 PM in SGT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IST and SGT are inside the 9-to-5 working day between 9:00 AM and 2:30 PM IST time (11:30 AM–5:00 PM SGT). That is roughly 5 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in IST is 10:30 PM in SGT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +2h 30m gap is not.
- Block 9:00 AM–2:30 PM IST as the recurring meeting window if you work primarily from IST and need SGT colleagues present.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
About SGT (Singapore Standard Time)
Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.
Best time to call between IST and SGT
Both IST and SGT sit inside the 9 AM – 5 PM working day between 9:00 AM–2:30 PM IST, which is 11:30 AM–5:00 PM SGT. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IST and SGT share 5 hours of working-hours overlap (9:00 AM–2:30 PM IST), so scheduling a live meeting is straightforward.
IST is 2 hours 30 minutes ahead of SGT (IST UTC+05:30 → SGT UTC+08:00). The shared working window is 9:00 AM–2:30 PM IST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IST and SGT?
IST (IST, UTC+05:30) is 2 hours 30 minutes ahead of SGT (SGT, UTC+08:00). The gap is currently +2h 30m.
How do I convert IST time to SGT time?
Add +2h 30m to IST local time. For example, 9:00 AM in IST is 11:30 AM in SGT.
What time is it in SGT right now?
SGT uses SGT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 30m offset from IST.
What is the best time to call SGT from IST?
Call between 9:00 AM and 2:30 PM IST — that maps to 11:30 AM–5:00 PM SGT and keeps both parties inside the working day.
Which is ahead, IST or SGT?
IST is 2 hours 30 minutes ahead of SGT. When it is 12:00 PM in IST it is 2:30 PM in SGT.
Does daylight saving time affect the IST–SGT difference?
Neither zone observes daylight saving time, so the +2h 30m offset between IST and SGT is fixed all year.
Which other cities share IST's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, IST's zone?
IST is used in India, Sri Lanka.
Is there a day difference between IST and SGT?
Not normally. The +2h 30m gap only pushes the date over for late-evening times.
What is the time difference between IST and SGT?
SGT is +2h 30m from IST.
What timezone is IST in?
IST operates on its local timezone.
What timezone is SGT in?
SGT operates on its local timezone.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
Which cities are in the SGT timezone?
Major cities in the SGT timezone include Singapore.
What is the UTC offset for SGT?
Singapore Standard Time (SGT) is at UTC+08:00.
What should I know about the SGT timezone?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
When is it midnight in IST, what time is it in SGT?
When it is 12:00 AM (midnight) in IST (IST), it is +2h 30m later in SGT (SGT).
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