IST to SGT Converter
Convert time between India Standard Time (IST) and Singapore Standard Time (SGT)
India Standard Time (IST)
Singapore Standard Time (SGT)
Time Difference
Singapore Standard Time (SGT) is 0 hours ahead of India Standard Time (IST)
Select Date
Select Time
Quick Reference
| IST | SGT |
|---|---|
| 07:30 | 10:00 |
| 09:30 | 12:00 |
| 11:30 | 14:00 |
| 13:30 | 16:00 |
| 15:30 | 18:00 |
| 17:30 | 20:00 |
| 19:30 | 22:00 |
| 21:30 | 00:00 |
| 23:30 | 02:00 |
| 01:30 | 04:00 |
| 03:30 | 06:00 |
| 05:30 | 08:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About IST to SGT Time Conversion
Converting time between India Standard Time (IST) and Singapore Standard Time (SGT) is a daily requirement for cross-Asia business and family connections. IST is UTC+5:30, while SGT is UTC+8 year-round, putting Singapore 2 hours 30 minutes ahead of India. Neither side observes daylight saving, so the 2.5-hour offset is constant 365 days a year — but the half-hour part trips up a lot of people scheduling on round-hour calendars.
This time zone converter uses the IANA timezone database to ensure accurate calculations including the half-hour offset. India spans a vast territory but observes a single IST zone, from Mumbai and Delhi to Kolkata and Bengaluru. Whether you're scheduling Bengaluru-Singapore tech meetings, planning travel to Singapore, or coordinating with Singaporean partners from India, our converter provides reliable results.
Common Use Cases for IST to SGT Conversion
Business & Work
- Scheduling meetings between Bengaluru, Mumbai or Delhi offices and Singapore
- Coordinating with Singapore partners from Indian IT, fintech and outsourcing firms
- Planning conference calls with Singaporean teams given the half-hour offset
Personal & Travel
- Planning travel between India and Singapore
- Coordinating with family and friends in Singapore
- Scheduling virtual events bridging the Indian subcontinent and Southeast Asia
Time Zone Information
India Standard Time (IST)
- UTC Offset: UTC+5:30
- IANA Timezone: Asia/Kolkata
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad, Pune, Ahmedabad
- Coverage: Republic of India (single nationwide timezone)
Singapore Standard Time (SGT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Singapore
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Singapore
- Coverage: Republic of Singapore
Quick Reference: IST to SGT
Remember: SGT is 2 hours 30 minutes ahead of IST, all year. The half-hour offset means a round-hour Indian meeting becomes a :30 slot in Singapore. Note: IST here is India Standard Time, not Israel Standard Time.
Frequently Asked Questions
What is the time difference between IST and SGT?
India Standard Time (IST) is UTC+5:30, while Singapore Standard Time (SGT) is UTC+8. SGT is 2 hours 30 minutes ahead of IST. When it is 12:00 PM in Mumbai or Bengaluru, it is 2:30 PM the same day in Singapore.
Does IST mean India or Israel Standard Time?
On this page IST refers to India Standard Time (UTC+5:30), used across all of India. Israel Standard Time is a separate timezone with a different offset, covered on its own page (and during the Israeli summer it becomes IDT).
Does India observe daylight saving?
No. India has never used daylight saving time, and Singapore has not either. The IST-SGT gap is a permanent 2 hours 30 minutes, year-round.
What are the best times for IST-SGT business calls?
Indian working hours (9:30 AM to 6:00 PM IST) overlap cleanly with Singapore late morning to evening (12:00 PM to 8:30 PM SGT). The half-hour offset means a 10:00 AM IST meeting is 12:30 PM SGT — comfortable for both sides.
Which countries or regions use SGT?
Singapore Standard Time is used only in the Republic of Singapore. Neighboring Malaysia uses the same UTC+8 offset under the name MYT, and Western Australia uses AWST also at UTC+8.
Which countries or regions use IST?
India Standard Time covers the entire Republic of India — a single timezone across the whole country. Major cities include Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad, Pune and Ahmedabad. Sri Lanka uses the same offset under the name IST or SLST.
Pro Tips
- • SGT is 2:30 ahead of IST — add 2 hours and 30 minutes to Indian time to get Singapore time.
- • Neither India nor Singapore observes DST, so the 2.5-hour gap is permanent year-round.
- • The half-hour offset is the big trap: round-hour meetings on one side become :30 slots on the other.
- • Indian working hours overlap fully with Singapore working hours — one of the best cross-Asia scheduling pairs.
- • Sri Lanka uses the same UTC+5:30 offset as India, so this page also works for Colombo-Singapore conversion.
- • Use IANA identifiers Asia/Kolkata and Asia/Singapore in calendars to stay aligned with regional rules.