IST to MST Converter
Need to convert India Standard Time to Mountain Standard Time? MST is 12 hours and 30 minutes behind IST. Edit the time or date below and the MST result updates live.
Daylight saving notes
In the United States and Canada, daylight saving time runs from the second Sunday in March to the first Sunday in November. That affects Mountain Standard Time (MST).
IST to MST conversion chart
For example, a 9:00 AM IST meeting takes place at 8:30 PM MST (−1 day). Concretely, when Mumbai (IST) and Denver (MST) set up a call, mST is 12 hours and 30 minutes behind IST.
| IST time | MST time |
|---|---|
| 12:00 AM | 11:30 AM−1 day |
| 1:00 AM | 12:30 PM−1 day |
| 2:00 AM | 1:30 PM−1 day |
| 3:00 AM | 2:30 PM−1 day |
| 4:00 AM | 3:30 PM−1 day |
| 5:00 AM | 4:30 PM−1 day |
| 6:00 AM | 5:30 PM−1 day |
| 7:00 AM | 6:30 PM−1 day |
| 8:00 AM | 7:30 PM−1 day |
| 9:00 AM | 8:30 PM−1 day |
| 10:00 AM | 9:30 PM−1 day |
| 11:00 AM | 10:30 PM−1 day |
| 12:00 PM | 11:30 PM−1 day |
| 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 |
This chart uses the fixed IST and MST offsets; the live converter above follows current daylight saving.
Convert IST to MST Time Zone
Everything you need for IST to MST — the difference, the current times, and how to plan around it.
How do I convert IST to MST?
It takes three quick steps:
- Click the IST field on the left and pick the time you want to convert.
- The matching MST time updates on the right automatically — there’s no button to press.
- Need a different day? Click the date field and the result follows, rolling over if it crosses midnight.
What is the time difference between IST and MST?
MST is 12 hours and 30 minutes behind IST. In everyday terms, once you know the time on one side you just subtract 12 hours 30 min to get the other — so a call between Mumbai and Denver is always 12 hours 30 min apart.
What's the current time in MST?
Right now the time in Mountain Standard Time (MST) is Monday, June 29, 2026 · 10:54:01 AM. It ticks every second, so you’re always looking at the live MST clock.
And what time is it in IST?
And in India Standard Time (IST), it’s currently Monday, June 29, 2026 · 11:24:01 PM. Compare the two and the 12 hours 30 min gap is easy to see.
Planning a meeting across IST and MST?
For example, a 9:00 AM IST meeting takes place at 8:30 PM MST (−1 day). The trick is to aim for a slot that lands inside normal working hours on both sides. Once you’ve found a time, hit Share on the converter to copy a link with the time built in — easy to send to a colleague. Juggling three or more zones? The meeting planner highlights the hours that overlap for everyone.
Does daylight saving time change the IST–MST difference?
The labels IST and MST are fixed offsets, so the result on this page is always exact. One side switches between standard and summer time while the other stays put, so the real-world gap can shift by an hour for part of the year. It's worth checking which label a region is actually using before you lock in a time.
How accurate is this IST to MST conversion?
We don’t guess. IST and MST times are worked out from the official IANA time zone database, the trusted standard that operating systems use worldwide. Because daylight-saving rules and regional offsets do change over time, we track those updates rather than relying on a fixed number — which is exactly where many converters slip up.
Convert IST to other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Convert to MST from other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Frequently asked questions
How many hours behind IST is MST?
MST is 12 hours and 30 minutes behind IST — a fixed 12 hours and 30 minutes difference, since both are fixed-offset labels.
What time is it in MST when it's 12:00 PM IST?
When it's 12:00 PM (noon) IST, it's 11:30 PM MST the previous day.
Do IST or MST use daylight saving time?
India Standard Time (IST) is a fixed offset with no daylight saving; Mountain Standard Time (MST) observes daylight saving, alternating with MDT.
Why might the real-world IST–MST difference change during the year?
The labels IST and MST are fixed offsets, so this converter is always exact. But Mountain Standard Time's region switches between standard and summer time, so for part of the year you may actually want IST to MDT. Always check which label a region is currently using before you schedule.