IST to MST Converter
MST is 12 hours and 30 minutes behind IST
IST to MST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in MST
| IST | MST |
|---|---|
| 12:00 AM | 11:30 AM -1d |
| 1:00 AM | 12:30 PM -1d |
| 2:00 AM | 1:30 PM -1d |
| 3:00 AM | 2:30 PM -1d |
| 4:00 AM | 3:30 PM -1d |
| 5:00 AM | 4:30 PM -1d |
| 6:00 AM | 5:30 PM -1d |
| 7:00 AM | 6:30 PM -1d |
| 8:00 AM | 7:30 PM -1d |
| 9:00 AM | 8:30 PM -1d |
| 10:00 AM | 9:30 PM -1d |
| 11:00 AM | 10:30 PM -1d |
| 12:00 PM | 11:30 PM -1d |
| 1:00 PM | 12:30 AM |
| 2:00 PM | 1:30 AM |
| 3:00 PM | 2:30 AM |
| 4:00 PM | 3:30 AM |
| 5:00 PM | 4:30 AM |
| 6:00 PM | 5:30 AM |
| 7:00 PM | 6:30 AM |
| 8:00 PM | 7:30 AM |
| 9:00 PM | 8:30 AM |
| 10:00 PM | 9:30 AM |
| 11:00 PM | 10:30 AM |
Converting India Standard Time to Mountain Standard Time
India Standard Time (IST) and Mountain Standard Time (MST) are separated by a 12 hours and 30 minutes time difference. MST is 12 hours and 30 minutes behind IST. IST is UTC+5:30, used in India, Sri Lanka, while MST is UTC-7, used in United States, Canada.
When converting from IST to MST, the key reference points to remember are: 9:00 AM IST equals 8:30 PM MST, 12:00 PM noon IST equals 11:30 PM MST, and 5:00 PM IST equals 4:30 AM MST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across IST and MST
For professionals scheduling meetings between IST and MST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 12 hours and 30 minutes difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
IST does not observe Daylight Saving Time, maintaining UTC+5:30 year-round. MST observes DST, switching to MDT (UTC-6). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.