JST to MST Time Zone Converter — Japan to Mountain

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time or date on either side — all cards update instantly.

From

UTC...

Japan Standard Time

To Same day

UTC...

Mountain Standard Time

Add another timezone to compare

JST to MST Conversion Chart

Last updated: April 2026

Today's reference — every 3 hours. DST is applied automatically.

JST Time	MST Time
12:00 AM	8:00 AM (-1 day)
3:00 AM	11:00 AM (-1 day)
6:00 AM	2:00 PM (-1 day)
9:00 AM	5:00 PM (-1 day)
12:00 PM	8:00 PM (-1 day)
3:00 PM	11:00 PM (-1 day)
6:00 PM	2:00 AM
9:00 PM	5:00 AM

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About JST to MST Conversion

Last updated: April 2026

Converting time between JST and MST requires understanding their time zone offsets and any daylight saving time adjustments. JST (JST) operates at UTC+9, while MST (MST) is set to UTC-7. This means MST is 16 hours behind JST. For example, when it's 10:01 PM JST on May 5, 2026, it's 6:01 AM MST in MST. Use this converter to quickly find the equivalent time in MST for any time in JST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

Last updated: April 2026

Select your source timezone from the "From timezone" dropdown (use search to find quickly)
Enter the date and time you want to convert (or click "Today" and "Now" for current time)
Select your target timezone from the "To timezone" dropdown
The conversion updates automatically as you change inputs - no button needed!
Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from JST

JST to EST JST to CST JST to MDT JST to PST JST to AKST JST to HST JST to GMT JST to CET JST to EET JST to MSK JST to IST JST to CST-CHINA JST to HKT JST to SGT JST to GST JST to AEST JST to AWST JST to NZST JST to UTC JST to ART JST to BRT JST to PHT JST to BDT JST to KST JST to SAST JST to ICT JST to EAT JST to WAT JST to PKT

Frequently Asked Questions

Last updated: April 2026

What is the time difference between JST and MST?

The time difference between JST and MST is 16 hours. MST is 16 hours behind JST.

Is MST ahead of or behind JST?

MST is behind JST by 16 hours. When it's 9 AM in JST, it's 5:00 PM in MST.

How many hours do you add to JST to get MST?

You subtract 16 hours from JST to get MST. For example, 9 AM JST - 16 hours = 5:00 PM MST.

Does the JST to MST time difference change during Daylight Saving Time?

No, the time difference between JST and MST remains constant throughout the year. Neither timezone observes Daylight Saving Time, so the 16-hour difference stays the same.

What is 9 AM JST in MST?

9 AM JST is 5:00 PM MST. This conversion accounts for the 16-hour time difference between the two timezones.

Is JST the same throughout the year when converting to MST?

Yes, the conversion between JST and MST remains consistent throughout the year. Since neither timezone observes Daylight Saving Time, the 16-hour difference is constant, making conversions predictable and straightforward.

Bottom banner (responsive)