IST ↔ GST Time Converter

Gulf Standard Time (GST) is 1h 30m behind of India Standard Time (IST). This comes from IST sitting at UTC+5:30 and GST at UTC+4. As a quick reference: when it is 9:00 AM in New Delhi, it is 7:30 AM in Dubai. At noon in New Delhi (12:00 PM), Dubai reads 10:30 AM. And 5:00 PM in New Delhi corresponds to 3:30 PM in Dubai.

To convert IST to GST by hand, subtract 1 hours 30 minutes to the IST time. For example, 12:00 PM IST becomes 10:30 AM GST. If the result goes past midnight, increment (or decrement) the calendar date accordingly — the converter on this page flags this with a "+1 Day" or "-1 Day" note automatically. For half-hour or 45-minute offsets, just carry the minutes over normally (e.g., 30 extra minutes means the result's minutes increase by 30, rolling over to the next hour if needed).

Gulf Standard Time (GST) is 1h 30m behind of India Standard Time (IST). Flipped the other way, IST is 1h 30m ahead of GST. A practical example: if someone in Dubai says "let's meet at noon," that maps to 1:30 PM IST in New Delhi.

India Standard Time (IST) is the civil time standard used across New Delhi, Mumbai, Bangalore, Chennai and nearby regions. It sits at UTC+5:30 relative to Coordinated Universal Time (UTC). It does not observe Daylight Saving Time, meaning the UTC offset stays constant at UTC+5:30 all year — every day of the year. The zone encompasses major cities including New Delhi, Mumbai, Bangalore, Chennai, Kolkata, Hyderabad, Colombo.

Gulf Standard Time (GST) is the standard time used in Dubai, Abu Dhabi, Sharjah, Muscat and surrounding areas. It operates at UTC+4 from UTC. It does not observe Daylight Saving Time — the offset remains fixed at UTC+4 throughout the year with no seasonal adjustment. Cities in this zone include Dubai, Abu Dhabi, Sharjah, Muscat, Doha, Bahrain, Kuwait City.

No. Neither IST nor GST observes Daylight Saving Time, so the offset between them stays constant at 1h 30m behind throughout the entire year. This makes recurring meetings and schedule planning straightforward — no need to adjust for seasonal clock changes on either side.

The ideal meeting window is where standard business hours (roughly 9 AM – 6 PM) overlap in both zones. Given that GST is 1h 30m behind of IST, mornings on the earlier side tend to align with afternoons on the later side. As a general rule: aim for 8 AM – 11 AM in the earlier zone to keep both sides in reasonable working hours. See the meeting hours table above for exact recommended slots for this specific pair. Avoid times that push either side before 7 AM or after 9 PM — those are shaded in the table.

Type any time directly into the GST input field in the bidirectional converter above — it calculates the IST equivalent instantly and works equally well in both directions. Alternatively, add 1 hours 30 minutes from the GST time to get the IST result manually. You can also visit the dedicated reverse page: GST to IST converter ↗.

For certain hours, the conversion can cross midnight into the next or previous calendar day. When a converted time goes past 11:59 PM or before 12:00 AM, the date changes. The converter on this page shows a "+1 Day" label when the result falls on the next calendar day, and "-1 Day" when it falls the previous day. Always check this when sending calendar invites across these two zones — booking a "Tuesday 3 PM" meeting can accidentally land on Wednesday or Monday in the other zone if you miss the date shift.

India Standard Time (IST) is used across the following cities and regions: New Delhi, Mumbai, Bangalore, Chennai, Kolkata, Hyderabad, Colombo. The zone covers UTC+5:30, with no seasonal change — the same offset applies every day of the year. It is one of the major time zones used for international scheduling and business.

Gulf Standard Time (GST) covers Dubai, Abu Dhabi, Sharjah, Muscat, Doha, Bahrain, Kuwait City among other locations. Running at UTC+4 with a fixed, year-round offset, it is the civil time standard for this part of the world. When coordinating across IST and GST, use the live clocks at the top of this page to confirm the exact current local time in both zones before finalising any schedule.

India Standard Time (IST) uses a UTC+5:30 offset — a 30-minute offset from the nearest whole hour — because India chose a single national time zone that best approximates local solar noon across the country's large east-west span. The half-hour offset is a deliberate compromise that puts most of the country within 30 minutes of solar noon, rather than forcing two separate time zones.

Yes — the converter on this page is designed for exactly that. The live clocks update every second so you always see the current time in both zones at a glance. The editable input fields let you test any time instantly, and the 24-hour table gives you a quick reference for the whole day. For recurring meetings, the best approach is to pick a slot from the "Best Meeting Hours" table above and then lock it in your calendar with the correct timezone so it self-adjusts for any DST transitions automatically.