Question 1

What is the time difference between GST and IST?

Accepted Answer

India Standard Time (IST) is 1 hours and 30 minutes ahead of Gulf Standard Time (GST). Use the conversion table above to see the exact time for each hour.

Question 2

How do I convert GST to IST?

Accepted Answer

To convert GST to IST, add 1 hours and 30 minutes to the GST time. For example, 9:00 AM GST is 10:30 AM IST.

Question 3

What time is it in IST when it's noon in GST?

Accepted Answer

When it's 12:00 PM (noon) in GST, it's 1:30 PM in IST. IST is 1 hours and 30 minutes ahead of GST.

Question 4

How many hours ahead is IST from GST?

Accepted Answer

IST is 1 hours and 30 minutes ahead of GST. This means when it's 9:00 AM in GST, it's 10:30 AM in IST.

Question 5

Is IST ahead or behind GST?

Accepted Answer

IST is ahead of GST by 1 hours and 30 minutes. Clocks in IST show a later time than GST.

Question 6

Does GST observe daylight saving time?

Accepted Answer

No, Gulf Standard Time does not observe daylight saving time. The UTC offset remains the same year-round.

Question 7

Does IST observe daylight saving time?

Accepted Answer

No, India Standard Time does not observe daylight saving time. The UTC offset remains the same year-round.

Question 8

What is the best time to call from GST to IST?

Accepted Answer

The best time for a call between GST and IST is during overlapping business hours (9 AM – 5 PM) in both timezones. Check the color-coded conversion table above — green hours indicate business hours in both zones.

Question 9

Do GST and IST ever have the same time?

Accepted Answer

No, GST and IST are always 1 hours and 30 minutes apart. Neither timezone observes DST, so the difference is constant year-round.

Gulf Standard Time (GST)	Period	India Standard Time (IST)	Period
12:00 AM	Night	1:30 AM	Night
1:00 AM	Night	2:30 AM	Night
2:00 AM	Night	3:30 AM	Night
3:00 AM	Night	4:30 AM	Night
4:00 AM	Night	5:30 AM	Night
5:00 AM	Night	6:30 AM	Morning
6:00 AM	Morning	7:30 AM	Morning
7:00 AM	Morning	8:30 AM	Morning
8:00 AM	Morning	9:30 AM	Business
9:00 AM	Business	10:30 AM	Business
10:00 AM	Business	11:30 AM	Business
11:00 AM	Business	12:30 PM	Business
12:00 PM	Business	1:30 PM	Business
1:00 PM	Business	2:30 PM	Business
2:00 PM	Business	3:30 PM	Business
3:00 PM	Business	4:30 PM	Business
4:00 PM	Business	5:30 PM	Business
5:00 PM	Business	6:30 PM	Evening
6:00 PM	Evening	7:30 PM	Evening
7:00 PM	Evening	8:30 PM	Evening
8:00 PM	Evening	9:30 PM	Evening
9:00 PM	Evening	10:30 PM	Evening
10:00 PM	Evening	11:30 PM	Evening
11:00 PM	Evening	12:30 AM+1d	Night

GST to IST Converter

Timezone Details

24-Hour Overview

GST to IST Conversion Table

Frequently Asked Questions

Related Conversions

Cities in These Timezones

GST Cities

IST Cities

More Tools

Learn More