What is the time difference between IST and MST?

IST is 12.5 hours behind MST. IST is UTC+5.5 and MST is UTC-7.

What is 9 AM IST in MST?

9 AM IST is 9:30 PM MST (previous day).

What is 12 PM IST in MST?

12 PM IST (noon) is 12:30 AM MST.

What are the best meeting times between IST and MST?

There is no standard business hours overlap between IST and MST.

IST to MST Time Converter

India Standard Time → Mountain Standard Time

IST

UTC+5.5

India Standard Time

offset

-12.5h

MST is 12.5h behind

MST

UTC-7

Mountain Standard Time

MST observes DST — offset shifts ±1h during transitions

India Standard Time (IST) is 12.5 hours behind Mountain Standard Time (MST). When it is noon in IST, it is 12:30 AM in MST. This offset may change during Daylight Saving Time transitions.

Meeting planner tool Reverse: MST to IST

Cities in IST

🇮🇳Mumbai 🇮🇳Delhi 🇮🇳Bangalore 🇮🇳Chennai 🇮🇳Kolkata

Cities in MST

🇺🇸Phoenix 🇺🇸Denver 🇨🇦Calgary

All 24 Hours — IST to MST

Click any row to see the full detail page. Current hour in IST is highlighted.

Both business hoursPartial overlap

12 AM6 AM12 PM6 PM11 PM

Best Meeting Times — IST & MST

No standard business-hours overlap between IST and MST. Consider early morning or evening calls.

Challenging overlap

IST and MST are 12.5 hours apart with no shared business-hours window. Try scheduling at 8 AM in the earlier timezone or 6 PM in the later one.

8 AM→8:30 PM−1d 9 AM→9:30 PM−1d 10 AM→10:30 PM−1d 11 AM→11:30 PM−1d 12 PM→12:30 AM 1 PM→1:30 AM 2 PM→2:30 AM 3 PM→3:30 AM 4 PM→4:30 AM 5 PM→5:30 AM

Related Time Zone Conversions

Frequently Asked Questions — IST to MST

India Standard Time (IST) is 12.5 hours behind Mountain Standard Time (MST). IST is UTC+5.5 and MST is UTC-7. This offset may shift by ±1 hour during Daylight Saving Time transitions.