MST to Kolkata Time Converter
IST is 12 hours 30 minutes ahead of MST. 9:00 AM MST = 9:30 PM IST.
IST is 12 hours 30 minutes ahead of MST at the moment. To convert MST to Kolkata Time, add 12 hours 30 minutes to the MST time: 9:00 AM MST = 9:30 PM IST.
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. Kolkata Time (Kolkata time) is used in Kolkata, India.
Most of Arizona uses MST all year and does not switch to MDT.
MST to Kolkata Time time conversion table
MST to Kolkata Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | Kolkata Time |
|---|---|
| 12:00 AM | 12:30 PM |
| 1:00 AM | 1:30 PM |
| 2:00 AM | 2:30 PM |
| 3:00 AM | 3:30 PM |
| 4:00 AM | 4:30 PM |
| 5:00 AM | 5:30 PM |
| 6:00 AM | 6:30 PM |
| 7:00 AM | 7:30 PM |
| MST | Kolkata Time |
|---|---|
| 8:00 AM | 8:30 PM |
| 9:00 AM | 9:30 PM |
| 10:00 AM | 10:30 PM |
| 11:00 AM | 11:30 PM |
| 12:00 PM | 12:30 AM+1 |
| 1:00 PM | 1:30 AM+1 |
| 2:00 PM | 2:30 AM+1 |
| 3:00 PM | 3:30 AM+1 |
| MST | Kolkata Time |
|---|---|
| 4:00 PM | 4:30 AM+1 |
| 5:00 PM | 5:30 AM+1 |
| 6:00 PM | 6:30 AM+1 |
| 7:00 PM | 7:30 AM+1 |
| 8:00 PM | 8:30 AM+1 |
| 9:00 PM | 9:30 AM+1 |
| 10:00 PM | 10:30 AM+1 |
| 11:00 PM | 11:30 AM+1 |
Conversion table from MST to Kolkata Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Kolkata Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert MST to Kolkata Time
Add 12 hours 30 minutes to the MST time to get Kolkata Time.
Example: 9:00 AM MST = 9:30 PM IST.
Across midnight: 10:00 PM MST = 10:30 AM IST (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and Kolkata Time
The time difference between MST and Kolkata Time is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: Kolkata Time is 12 hours 30 minutes ahead of MST.
- 8 Mar 2026 – 31 Oct 2026: Kolkata Time is 11 hours 30 minutes ahead of MST.
- 1 Nov 2026 – 30 Dec 2026: Kolkata Time is 12 hours 30 minutes ahead of MST.
MST and Kolkata Time during daylight saving time
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
- Kolkata Time does not observe daylight saving time; it stays on UTC+5:30 all year.
Best time for a meeting between MST and Kolkata Time
MST and Kolkata Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM MST, which is 7:30 PM IST.
MST to Kolkata Time FAQ
What is the time difference between MST and Kolkata Time?
Right now IST is 12 hours 30 minutes ahead of MST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM MST in Kolkata Time?
9:00 AM MST is 9:30 PM IST.
What is 12 PM (noon) MST in Kolkata Time?
12:00 PM MST is 12:30 AM IST (next day).
Is Kolkata Time ahead of or behind MST?
IST is 12 hours 30 minutes ahead of MST, so it is later in Kolkata Time than in MST.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
Does Kolkata Time change for daylight saving time?
No. Kolkata Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between MST and Kolkata Time?
MST and Kolkata Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM MST, which is 7:30 PM IST.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert Kolkata Time to MST
Convert MST to other time zones
Convert other time zones to Kolkata Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.