IST · Any City · DST-aware

Time Zone Converter

Compare the time between any two countries side by side. Change either location to your choice, then drag the slider to find a time that works for both. DST-aware.

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India Standard Time (IST)

Click a location name to change the country. Drag either slider to pick a time — both update in sync.

What is IST (Indian Standard Time)?

Indian Standard Time is the single time zone used across all of India, set at UTC+5:30 — 5 hours 30 minutes ahead of Coordinated Universal Time (UTC, the modern successor to GMT).

It is calculated from the 82.5°E meridian, which passes near Mirzapur in Uttar Pradesh. The unusual half-hour offset is why India is "+5:30" rather than a round number of hours.

No Daylight Saving

India does not observe DST, so IST stays at UTC+5:30 all year. The gap to countries that do shift by an hour during their summer.

Best Times to Schedule Calls from India

Finding a window that suits both sides is the most common reason to convert time zones. Handy overlaps from IST:

USA (East, EST)

India evening = US morning

6:30–9:30 PM IST
UK (GMT/BST)

India afternoon = UK morning

1:30–5:30 PM IST
Australia (Sydney)

India morning = AU afternoon

7:30–11:30 AM IST

* Shift by ±1 hour when the other country is on daylight saving.

Frequently Asked Questions

What is the time difference between IST and EST?
IST (UTC+5:30) is 10 hours 30 minutes ahead of EST (UTC-5). During US EDT (UTC-4), the difference is 9 hours 30 minutes. If it's 9:00 AM IST, it's 10:30 PM EST the previous night.
What is IST to GMT offset?
IST is UTC+5:30, which is 5 hours 30 minutes ahead of GMT (UTC+0). If it's 12:00 PM IST, it's 6:30 AM GMT.
What is the time difference between India and Dubai?
Dubai uses GST (UTC+4), which is 1 hour 30 minutes behind IST. If it's 12:00 PM in India, it's 10:30 AM in Dubai.
What is IST to Singapore time?
Singapore Standard Time (SGT) is UTC+8, which is 2 hours 30 minutes ahead of IST (UTC+5:30). If it's 12:00 PM in India, it's 2:30 PM in Singapore.
Does India observe Daylight Saving Time?
No. India does not observe DST. IST remains at UTC+5:30 all year. Countries like the USA, UK, and most of Europe do observe DST, changing the offset vs. India by 1 hour during summer.
What is the time difference between India and the UK?
IST is 5 hours 30 minutes ahead of the UK in winter (GMT). When the UK is on British Summer Time (BST, late March to late October), the difference narrows to 4 hours 30 minutes. So 1:00 PM IST is 7:30 AM in London in winter, or 8:30 AM in summer.
What is the time difference between India and Australia?
Sydney (AEST, UTC+10) is 4 hours 30 minutes ahead of IST. During Australian daylight saving (AEDT, UTC+11, roughly October to April) it is 5 hours 30 minutes ahead. So 9:00 AM IST is 1:30 PM in Sydney (or 2:30 PM during AEDT).
Why is IST offset by 30 minutes (UTC+5:30)?
IST is based on the 82.5°E meridian, which lies between the eastern and western edges of the country and passes near Mirzapur, Uttar Pradesh. Because 82.5° works out to exactly 5 hours 30 minutes of rotation from the prime meridian, India ends up with a half-hour offset rather than a whole number of hours.

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