Time zone converter/EST to MST
EST to MST Converter
Mountain Standard Time (MST) is 2 hours behind Eastern Standard Time (EST). To convert EST to MST, subtract 2 hours.
1 PM EST = 11 AM MST
- 9:00 AM EST→7:00 AM MST
- 10:00 AM EST→8:00 AM MST
- 11:00 AM EST→9:00 AM MST
- 12:00 PM EST→10:00 AM MST
- 1:00 PM EST→11:00 AM MST
- 3:00 PM EST→1:00 PM MST
MST = EST − 2 hours · EST = MST + 2 hours
From
Eastern Standard Time (EST)
—
To
Mountain Standard Time (MST)
—
The converted time appears in the result below.
Calculating time difference
Pick a date and time above.
MST = EST − 2 hours · EST = MST + 2 hours
EST and MST stay on standard time all year — they don’t switch for daylight saving. Use ET to MT when you want Eastern Time to Mountain Time (Denver) for a specific day, including EDT or MDT when local clocks are on daylight time.
EST to MST Conversion Table
Every hour of the day. Highlighted rows are common conversions. If you see −1 next to MST, that Mountain time falls on the previous calendar day.
| EST | MST | Note |
|---|---|---|
| 12:00 AM EST | 10:00 PM MST −1 | Previous day |
| 1:00 AM EST | 11:00 PM MST −1 | Previous day |
| 2:00 AM EST | 12:00 AM MST | — |
| 3:00 AM EST | 1:00 AM MST | — |
| 4:00 AM EST | 2:00 AM MST | — |
| 5:00 AM EST | 3:00 AM MST | — |
| 6:00 AM EST | 4:00 AM MST | — |
| 7:00 AM EST | 5:00 AM MST | — |
| 8:00 AM EST | 6:00 AM MST | — |
| 9:00 AM EST | 7:00 AM MST | Popular |
| 10:00 AM EST | 8:00 AM MST | — |
| 11:00 AM EST | 9:00 AM MST | Popular |
| 12:00 PM EST | 10:00 AM MST | Popular |
| 1:00 PM EST | 11:00 AM MST | Popular |
| 2:00 PM EST | 12:00 PM MST | Popular |
| 3:00 PM EST | 1:00 PM MST | Popular |
| 4:00 PM EST | 2:00 PM MST | — |
| 5:00 PM EST | 3:00 PM MST | — |
| 6:00 PM EST | 4:00 PM MST | — |
| 7:00 PM EST | 5:00 PM MST | — |
| 8:00 PM EST | 6:00 PM MST | — |
| 9:00 PM EST | 7:00 PM MST | — |
| 10:00 PM EST | 8:00 PM MST | — |
| 11:00 PM EST | 9:00 PM MST | — |
Popular EST to MST Conversions
Quick answers for the times people look up most between Eastern and Mountain — as EST/MST, or as everyday Eastern Time to Mountain Time.
11 AM ET to MT
11:00 AM Eastern Time is normally 9:00 AM Mountain Time. Subtract two hours — the everyday Eastern to Mountain gap matches the EST to MST rule almost every day of the year. On standard time, 11 AM EST is 9 AM MST.
1 PM EST to MST
1:00 PM EST is 11:00 AM MST. Subtract two hours and you are on Mountain. On everyday clocks, 1 PM Eastern Time is normally 11 AM Mountain Time too.
9 AM EST to MST
9:00 AM EST is 7:00 AM MST. Mid-morning Eastern is early morning on the Mountain side — still just subtract two hours.
3 PM EST to MST
3:00 PM EST is 1:00 PM MST. Mid-afternoon Eastern is early afternoon Mountain, and the same step works in reverse: 1 PM MST is 3 PM EST.
2 PM EST to MST
2:00 PM EST is 12:00 PM MST. Early afternoon Eastern is lunchtime on the Mountain side — still a two-hour subtract.
12 PM EST to MST
12:00 PM EST is 10:00 AM MST. Noon Eastern is mid-morning on the Mountain side — a good window for calls that work in both regions.
Eastern Time to Mountain Time
Eastern Time is normally 2 hours ahead of Mountain Time. For example, 1 PM Eastern Time is normally 11 AM Mountain Time. Day to day, ET to MT usually follows that same two-hour gap. On the map, that is New York to Denver: 1 PM in New York is 11 AM in Denver.
ET means Eastern Time — EST in winter, EDT in summer. MT means Mountain Time (Denver) — MST in winter, MDT in summer. If a meeting invite only says “Eastern” or “Mountain,” pick the meeting date so the result matches what local clocks show that day.
New York and Denver change clocks on the same spring and fall dates, so ET to MT stays a 2-hour gap on almost every day of the year. The odd combinations come from mixing labels — EST with MDT is only 1 hour apart, and EDT with MST is 3 hours apart. That is why ET → MT uses the date you pick instead of always subtracting 2 hours.
Use EST → MST when both sides should stay on standard time, even in July. Use ET → MT when you want Eastern and Mountain local time for the day you pick, including EDT or MDT in summer.
Mountain Time here follows the Denver clock. Arizona stays on MST through the summer and does not change for daylight saving — choose Arizona if that is the place you mean.
What Is the Time Difference Between EST and MST?
EST is 2 hours ahead of MST, and MST is 2 hours behind EST. Eastern Standard Time is UTC−5 and Mountain Standard Time is UTC−7, so subtract 2 hours when converting EST to MST. That gap stays the same all year as long as both sides are on standard time.
- EST = UTC−5
- MST = UTC−7
- MST = EST − 2 hours
- EST = MST + 2 hours
Example: 9 AM EST is 7 AM MST. 1 PM EST is 11 AM MST. Add two hours to go from MST back to EST.
EST/MST vs ET/MT: What’s the Difference?
| Term | Meaning |
|---|---|
| EST | Eastern Standard Time · UTC−5 |
| EDT | Eastern Daylight Time · UTC−4 |
| ET | Eastern Time · EST or EDT |
| MST | Mountain Standard Time · UTC−7 |
| MDT | Mountain Daylight Time · UTC−6 |
| MT | Mountain Time · MST or MDT |
The whole Eastern zone and most of the US Mountain region around Denver change clocks in the same weeks of spring and fall. So everyday Eastern Time to Mountain Time usually stays two hours apart in winter and in summer. What changes is the name on the clock: EST/MST in standard time, EDT/MDT in daylight time.
On a January workday, 1 PM EST is 11 AM MST. On a July workday, 1 PM EDT is 11 AM MDT — still two hours, different names. EST to MST always uses standard time, even in July. Eastern Time to Mountain Time follows the date you enter and shows EDT or MDT when local clocks are on daylight time.
Mountain Time here means the Denver clock. Arizona stays on MST in summer and does not change for daylight saving — choose Arizona if that is the place you mean.
Use EST → MST when both times should stay on standard time, all year. Use ET → MT when you want Eastern and Mountain local time for the date you pick.
Current Eastern and Mountain Time
Eastern Time and Mountain Time (Denver) right now, with the name each region is using this season. The EST and MST cards below always stay on standard time, even when local clocks show EDT or MDT.
Eastern Time
--:--
ET
Mountain Time (Denver)
--:--
MT
EST
UTC−5
Standard time all year
MST
UTC−7
Standard time all year
Eastern to Mountain Time Meeting Planner
Workday hours on standard time. Highlighted rows are easier on both sides — roughly 10 AM to 4 PM Eastern / 8 AM to 2 PM Mountain. For a summer meeting on local Eastern and Mountain time, switch to ET → MT and choose the meeting date.
| Eastern | Mountain | For calls |
|---|---|---|
| 8:00 AM | 6:00 AM | Early for Mountain (8 AM Eastern / 6 AM Mountain) |
| 9:00 AM | 7:00 AM | Early for Mountain (9 AM Eastern / 7 AM Mountain) |
| 10:00 AM | 8:00 AM | Works well for both (10 AM Eastern / 8 AM Mountain) |
| 11:00 AM | 9:00 AM | Works well for both (11 AM / 9 AM Mountain) |
| 12:00 PM | 10:00 AM | Works well for both (noon / 10 AM Mountain) |
| 1:00 PM | 11:00 AM | Works well for both (1 PM / 11 AM Mountain) |
| 2:00 PM | 12:00 PM | Works well for both (2 PM / noon Mountain) |
| 3:00 PM | 1:00 PM | Works well for both (3 PM / 1 PM Mountain) |
| 4:00 PM | 2:00 PM | Late day, still workable (4 PM Eastern / 2 PM Mountain) |
| 5:00 PM | 3:00 PM | Late for Eastern (5 PM Eastern / 3 PM Mountain) |
MST to EST Converter
Going the other way? Add 2 hours to an MST time to get EST.
About These Time Zones
Open a zone page for the fixed abbreviation, or the regional clock that follows daylight saving for the date you pick.
EST to MST FAQ
- What is 11 AM ET in Mountain Time?
- 11 AM ET is normally 9 AM Mountain Time. Everyday Eastern to Mountain follows the same 2-hour gap as EST to MST. On standard time, 11 AM EST is 9 AM MST.
- What is 1 PM EST in MST?
- 1 PM EST is 11 AM MST. Subtract 2 hours. Going the other way, 11 AM MST is 1 PM EST.
- What is 9 AM EST in MST?
- 9 AM EST is 7 AM MST. On everyday clocks, 9 AM Eastern Time is normally 7 AM Mountain Time too.
- What is 3 PM EST in MST?
- 3 PM EST is 1 PM MST. Subtract 2 hours to go from Eastern to Mountain.
- How many hours is MST behind EST?
- Two hours. EST is UTC−5 and MST is UTC−7, so MST = EST − 2 hours and EST = MST + 2 hours.
- How do I convert EST to MST?
- Subtract 2 hours (MST = EST − 2; EST = MST + 2). Examples: 9 AM EST → 7 AM MST; 1 PM EST → 11 AM MST.
- Is Eastern Time two hours ahead of Mountain Time?
- Yes — 1 PM Eastern is usually 11 AM Mountain. ET and MT are the everyday labels; winter clocks often read EST/MST, summer EDT/MDT.
- What is ET to MT?
- ET to MT converts everyday Eastern Time to everyday Mountain Time — EST or EDT on the Eastern side, MST or MDT on the Mountain side. It follows the date you pick, so a summer date uses EDT and MDT and a winter date uses EST and MST.
- What is the difference between EST/MST and ET/MT?
- EST and MST always mean standard time (UTC−5 and UTC−7). ET and MT are everyday Eastern and Mountain time — standard in winter, daylight in summer. Use EST → MST when both sides should stay on standard time; use ET → MT when you care about a specific day.
- Does the converter account for daylight saving time?
- EST → MST stays on standard time all year and does not flip for daylight saving. Switch to ET → MT and pick a date when you want Eastern Time and Mountain Time (Denver) for that day, including EDT or MDT in summer.