IST to GST Converter
Convert time between India Standard Time (IST) and Gulf Standard Time (GST)
India Standard Time (IST)
Gulf Standard Time (GST)
Time Difference
Gulf Standard Time (GST) is 0 hours ahead of India Standard Time (IST)
Select Date
Select Time
Quick Reference
| IST | GST |
|---|---|
| 07:30 | 06:00 |
| 09:30 | 08:00 |
| 11:30 | 10:00 |
| 13:30 | 12:00 |
| 15:30 | 14:00 |
| 17:30 | 16:00 |
| 19:30 | 18:00 |
| 21:30 | 20:00 |
| 23:30 | 22:00 |
| 01:30 | 00:00 |
| 03:30 | 02:00 |
| 05:30 | 04:00 |
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 GST Time Conversion
Converting time from India Standard Time (IST) to Gulf Standard Time (GST) is essential for coordinating between India and the Gulf states. IST is UTC+5:30 and GST is UTC+4, so GST is 1.5 hours behind IST. Neither India nor the Gulf states observe daylight saving time, so the offset is rock-steady year-round.
This small offset means business hours overlap heavily — India and the UAE, Oman, and similar Gulf countries can run nearly synchronous workdays. Whether you are coordinating with Dubai, Abu Dhabi, or Muscat, our IANA-based converter delivers reliable results every day of the year.
Common Use Cases for IST to GST Conversion
Business & Work
- Scheduling calls between Indian teams and Dubai or Abu Dhabi offices
- Coordinating trade, finance, or energy operations between India and the Gulf
- Planning daily standups that fit both Indian and UAE working hours
Personal & Travel
- Keeping in touch with family or friends working in the Gulf states
- Planning travel from India to Dubai, Abu Dhabi, or Muscat
- Scheduling online prayer, study, or virtual family events across both regions
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: New Delhi, Mumbai, Bangalore, Hyderabad, Chennai, Kolkata
- Coverage: Entire India (single timezone covering the nation)
Gulf Standard Time (GST)
- UTC Offset: UTC+4 (no DST observed)
- IANA Timezone: Asia/Dubai
- Daylight Saving: Gulf states do not observe daylight saving time
- Major Cities: Dubai, Abu Dhabi, Sharjah, Muscat
- Coverage: United Arab Emirates and Oman
Quick Reference: IST to GST
Remember: GST is 1.5 hours behind IST year-round. No daylight saving time in either region, so this offset is constant.
Frequently Asked Questions
What is the time difference between IST and GST?
India Standard Time (IST) is UTC+5:30, while Gulf Standard Time (GST) is UTC+4. GST is 1.5 hours behind IST, so when it is 9:00 AM in Delhi, it is 7:30 AM in Dubai.
Does the IST to GST time difference change throughout the year?
No. Neither India nor the Gulf states (UAE, Oman) observe daylight saving time. IST stays at UTC+5:30 and GST stays at UTC+4 every day of the year, so the 1.5-hour gap is constant.
How do half-hour offsets affect this conversion?
IST sits on a half-hour offset (UTC+5:30) while GST does not, so conversions land on :30 minutes (e.g. 9:00 AM IST → 7:30 AM GST).
What are the best times to schedule IST to GST business calls?
Overlap is excellent — Indian and Gulf workdays run almost in lockstep. 10 AM–6 PM IST is 8:30 AM–4:30 PM GST, giving full-day live collaboration. The shared business window makes IST-GST one of the easiest cross-region pairs to coordinate.
Which regions and cities use GST?
GST (UTC+4) is used in the United Arab Emirates and Oman. Major cities include Dubai, Abu Dhabi, Sharjah, and Muscat. Saudi Arabia, Bahrain, and Qatar use Arabia Standard Time (AST/UTC+3), which is 30 minutes earlier than GST.
Which regions use IST?
IST (UTC+5:30) covers all of India under a single timezone. Major cities include New Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Kolkata. India does not observe daylight saving time.
Pro Tips
- • GST is always 1.5 hours behind IST — subtract 1:30 from Indian time.
- • Neither region observes DST, so this conversion is constant year-round.
- • Indian afternoons (1–4 PM IST) are late mornings to early afternoons (11:30 AM–2:30 PM GST) in Dubai — a strong window for full attention on both sides.
- • Friday is the start of the weekend in many Gulf states, while India observes Saturday-Sunday weekends — overlapping working days are Sunday through Thursday.
- • Many Indian expatriates live and work in the UAE, making this a high-traffic conversion for personal calls and remittances.
- • Flights between India and the Gulf are short (3–4 hours), so jet lag is rarely an issue for travellers.