IST is ahead of all US time zones. The difference ranges from 9.5 to 13.5 hours depending on the US time zone and whether Daylight Saving Time is in effect.
What is the time difference between US Time and IST?
The time difference between US Time and Indian Standard Time (IST) varies by time zone: EST/EDT is 10.5/9.5 hours behind, CST/CDT is 11.5/10.5 hours behind, MST/MDT is 12.5/11.5 hours behind, and PST/PDT is 13.5/12.5 hours behind IST.