IST to MST — Time Zone Converter
India Standard Time (IST, UTC+5:30) covers India; Mountain Time (MST, UTC−7) covers the US Mountain states. In standard time, MST is 12½ hours behind IST. Standard working days in India and the US Mountain states barely overlap, so most teams alternate who takes the early-morning or late-evening slot. Use the live converter below — it applies today's IANA time zone data, including daylight saving time, and gives you a meeting schedule you can paste straight into email or Slack.
IST to MST, hour by hour (today)
Frequently asked questions
What is the time difference between IST and MST?+
India Standard Time (IST) is UTC+5:30 and Mountain Time (MST) is UTC−7, so in standard time MST is 12½ hours behind IST. The gap shifts by an hour around daylight saving transitions, so always check a live converter near the change dates in spring and autumn.
Does IST or MST observe daylight saving time?+
India Standard Time stays on UTC+5:30 all year — no daylight saving time. Mountain Time observes daylight saving time (MST in winter, MDT in summer).
What is the best time for a meeting between IST and MST?+
Standard working days in India and the US Mountain states barely overlap, so most teams alternate who takes the early-morning or late-evening slot. The converter above highlights office hours in green for both zones, so you can slide to a time that works for everyone.
How do I share a IST to MST meeting time by email?+
Pick a time in the converter, log it to the Smart Clipboard, and copy it as bullets, a formatted table, or a one-line question — with both IST and MST times spelled out so nobody has to do the math.