IST to MST converter
MST is 11.5 hours behind IST right now. India Standard Time is the clock in New Delhi; Mountain Time is the clock in Denver.
Why the gap changes
Denver observes daylight saving, so its gap with India changes twice a year. Phoenix, on Mountain Standard Time all year like India’s fixed offset, keeps a constant gap with India.
Over the next 12 months the difference is 11.5 hours or 12.5 hours, depending on the date. The table and the converter always use the date you pick. See EST vs EDT for why the abbreviations change.
IST to MST conversion table
For Saturday, October 31, 2026, hour by hour.
| New Delhi (IST) | Denver (MST) |
|---|---|
| 12:00 AM | 12:30 PM (prev. day) |
| 1:00 AM | 1:30 PM (prev. day) |
| 2:00 AM | 2:30 PM (prev. day) |
| 3:00 AM | 3:30 PM (prev. day) |
| 4:00 AM | 4:30 PM (prev. day) |
| 5:00 AM | 5:30 PM (prev. day) |
| 6:00 AM | 6:30 PM (prev. day) |
| 7:00 AM | 7:30 PM (prev. day) |
| 8:00 AM | 8:30 PM (prev. day) |
| 9:00 AM | 9:30 PM (prev. day) |
| 10:00 AM | 10:30 PM (prev. day) |
| 11:00 AM | 11:30 PM (prev. day) |
| 12:00 PM | 12:30 AM |
| 1:00 PM | 1:30 AM |
| 2:00 PM | 2:30 AM |
| 3:00 PM | 3:30 AM |
| 4:00 PM | 4:30 AM |
| 5:00 PM | 5:30 AM |
| 6:00 PM | 6:30 AM |
| 7:00 PM | 7:30 AM |
| 8:00 PM | 8:30 AM |
| 9:00 PM | 9:30 AM |
| 10:00 PM | 10:30 AM |
| 11:00 PM | 11:30 AM |
Best overlap for meetings
A 9-to-5 day in New Delhi and in Denver doesn’t overlap at all today, so one side has to start early or stay late. Try other hours or add more cities in the meeting planner.
Related conversions
Frequently asked questions
What is 9 AM IST in MST?
Today, 9:00 AM in New Delhi (GMT+5:30) is 9:30 PM in Denver (MDT). The table on this page lists every hour.
How many hours apart are IST and MST?
MST is 11.5 hours behind IST right now. Over a year the gap takes 2 values (11.5 hours, 12.5 hours) because the two zones change clocks for daylight saving on different dates, or only one of them does.
When do IST and MST working hours overlap?
With a 9-to-5 day in both places there is no shared hour today; one side has to start early or stay late. The meeting planner can test other hours.