MST to IST time conversion
IST is 12 hours 30 minutes ahead of MST.
MST is always UTC-7. Right now most places that use MST are on MDT (UTC-6): IST is 11 hours 30 minutes ahead of MDT.
Time difference with your location
MST is 7 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in MST to convert it to IST on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · MST → IST
This table converts each hour in MST to IST on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| MST | IST | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 12:3012:30 PM | |
| 01:001:00 AM | 13:301:30 PM | |
| 02:002:00 AM | 14:302:30 PM | |
| 03:003:00 AM | 15:303:30 PM | |
| 04:004:00 AM | 16:304:30 PM | |
| 05:005:00 AM | 17:305:30 PM | |
| 06:006:00 AM | 18:306:30 PM | |
| 07:007:00 AM | 19:307:30 PM | |
| 08:008:00 AM | 20:308:30 PM | |
| 09:009:00 AM | 21:309:30 PM | |
| 10:0010:00 AM | 22:3010:30 PM | |
| 11:0011:00 AM | 23:3011:30 PM | |
| 12:0012:00 PM | 00:3012:30 AM +1 day | |
| 13:001:00 PM | 01:301:30 AM +1 day | |
| 14:002:00 PM | 02:302:30 AM +1 day | |
| 15:003:00 PM | 03:303:30 AM +1 day | |
| 16:004:00 PM | 04:304:30 AM +1 day | |
| 17:005:00 PM | 05:305:30 AM +1 day | |
| 18:006:00 PM | 06:306:30 AM +1 day | |
| 19:007:00 PM | 07:307:30 AM +1 day | |
| 20:008:00 PM | 08:308:30 AM +1 day | |
| 21:009:00 PM | 09:309:30 AM +1 day | |
| 22:0010:00 PM | 10:3010:30 AM +1 day | |
| 23:0011:00 PM | 11:3011:30 AM +1 day |
Quick conversion examples
These examples use MST (UTC-7) and IST (UTC+5:30); choosing a date applies the local clock changes.
Conversion formula: IST = MST + 12h30 · MDT + 11h30.
| MST | IST |
|---|---|
| 6:00 AM MST | = 6:30 PM IST |
| 7:00 AM MST | = 7:30 PM IST |
| 8:00 AM MST | = 8:30 PM IST |
| 9:00 AM MST | = 9:30 PM IST |
| 10:00 AM MST | = 10:30 PM IST |
| 12:00 PM MST | = 12:30 AM IST (+1 day) |
| 3:00 PM MST | = 3:30 AM IST (+1 day) |
| 5:00 PM MST | = 5:30 AM IST (+1 day) |
| 6:00 PM MST | = 6:30 AM IST (+1 day) |
| 8:00 PM MST | = 8:30 AM IST (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working days in MST and IST do not overlap on 2026-10-21.
Clock changes on both sides, 2026–2028
MST and IST have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | MST | IST |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+5:30 all year. |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+5:30 all year. |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | No clock changes; UTC+5:30 all year. |
At the start of 2026, IST is 12 hours 30 minutes ahead of MST. The difference changes during the following periods.
- From 2026-03-08 03:00 MDT until 2026-11-01 01:00 MST, IST is 11 hours 30 minutes ahead of MDT.
- From 2027-03-14 03:00 MDT until 2027-11-07 01:00 MST, IST is 11 hours 30 minutes ahead of MDT.
- From 2028-03-12 03:00 MDT until 2028-11-05 01:00 MST, IST is 11 hours 30 minutes ahead of MDT.
Frequently asked questions
What time is 9 AM MST in IST?
9:00 AM MST = 9:30 PM IST, using UTC-7 and UTC+5:30. Choose a date above for the seasonal local time.
Does the time difference between MST and IST change during the year?
Yes. During 2026–2028: IST is 11 hours 30 minutes ahead of MST; IST is 12 hours 30 minutes ahead of MST. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in IST?
Read the IST clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between MST and IST?
The 08:00–18:00 working days in MST and IST do not overlap.
What is the time difference between MST and IST now?
Right now, IST is 12 hours 30 minutes ahead of MST. Conversion formula: IST = MST + 12h30 · MDT + 11h30.