IST to MST converter
India Standard Time (IST) is typically 12½ hours ahead of Mountain Time (MST).
India Standard Time → Mountain Time, hour by hour below.
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India Standard Time (IST) is UTC+5:30 with no daylight saving. It covers Mumbai, Delhi, Bengaluru and Chennai.
Mountain Time (MST) is UTC−7 and observes daylight saving (MDT, UTC−6, roughly March–November). It covers Denver, Salt Lake City and Calgary.
Mountain Time is typically 12½ hours behind India Standard Time, though daylight saving can shift the difference by an hour at some times of year.
Time difference between India Standard Time and Mountain Time
Mountain Time is typically 12½ hours behind India Standard Time, though daylight saving can shift the difference by an hour at some times of year. Put the other way around: mountain Time (MST) is typically 12½ hours behind India Standard Time (IST). The table above shows the difference hour by hour using today's actual offsets.
Best time to call Mountain Time from India Standard Time
There's no 9-to-5 overlap between India Standard Time and Mountain Time, so one side always has to flex. The practical slots: 10:30 PM in India Standard Time is 10:00 AM in Mountain Time. Daylight saving can shift these times by an hour at some points in the year.
IST to MST, hour by hour
Today's actual offsets. Rows where both zones are inside 9am–5pm working hours are highlighted.