CST ↔ JST Time Converter

Convert CST to JST instantly. Central Standard Time is UTC-6 / UTC-5 (CDT) and Japan Standard Time is UTC+9 — a 15h ahead difference. Enter any time in either field — both are fully editable. Use the ⇄ button to swap directions.

🕐 Live Current Times

CST
--:--:--
--
Central Standard Time
15h ahead
⇄ JST→CST
JST
--:--:--
--
Japan Standard Time

⚡ Bidirectional Time Converter

CST (UTC-6 / UTC-5 (CDT)) → JST (UTC+9) · Difference: 15h ahead (auto-adjusts for DST)

ℹ️ Timezone Details

CST Offset
UTC-6 / UTC-5 (CDT)
JST Offset
UTC+9
Difference
15h ahead
CST Full Name
Central Standard Time
JST Full Name
Japan Standard Time
Vice Versa
JST → CST ↗

🤝 Best Meeting Hours Between CST and JST

Because JST is 15h ahead CST, use this table to plan calls that fall in reasonable working hours for both sides.

CSTJSTSuitability
7:00 AM10:00 PMGood — early morning start
8:00 AM11:00 PMBest overlap
9:00 AM12:00 AMBest overlap
10:00 AM1:00 AMBest overlap
11:00 AM2:00 AMGood — late afternoon

🏙️ Cities Covered by Each Time Zone

CST Cities
Chicago, Dallas, Houston, Minneapolis, Kansas City, New Orleans
JST Cities
Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka

Note: Some timezones observe Daylight Saving Time, so the offset may change seasonally. The live clocks and converter on this page adjust automatically.

📋 Full 24-Hour Conversion Table — CST to JST

CST (12h)CST (24h)JST (12h)JST (24h)DayType
12:00 AM00:003:00 PM15:00—Night
1:00 AM01:004:00 PM16:00—Night
2:00 AM02:005:00 PM17:00—Night
3:00 AM03:006:00 PM18:00—Night
4:00 AM04:007:00 PM19:00—Night
5:00 AM05:008:00 PM20:00—Night
6:00 AM06:009:00 PM21:00—
7:00 AM07:0010:00 PM22:00—
8:00 AM08:0011:00 PM23:00—
9:00 AM09:0012:00 AM00:00+1 DayBusiness
10:00 AM10:001:00 AM01:00+1 DayBusiness
11:00 AM11:002:00 AM02:00+1 DayBusiness
12:00 PM12:003:00 AM03:00+1 DayBusiness
1:00 PM13:004:00 AM04:00+1 DayBusiness
2:00 PM14:005:00 AM05:00+1 DayBusiness
3:00 PM15:006:00 AM06:00+1 DayBusiness
4:00 PM16:007:00 AM07:00+1 DayBusiness
5:00 PM17:008:00 AM08:00+1 DayBusiness
6:00 PM18:009:00 AM09:00+1 Day
7:00 PM19:0010:00 AM10:00+1 Day
8:00 PM20:0011:00 AM11:00+1 Day
9:00 PM21:0012:00 PM12:00+1 Day
10:00 PM22:001:00 PM13:00+1 DayNight
11:00 PM23:002:00 PM14:00+1 DayNight

Note: this table uses a fixed offset. During Daylight Saving Time the difference may change — use the live converter above which adjusts automatically.

🔗 Related Converters

💡 How to Convert CST to JST

1
Find the offset — Central Standard Time is UTC-6 / UTC-5 (CDT) and Japan Standard Time is UTC+9. The difference between them is 15h ahead.
2
Use either input field — Type a time in the CST field to get the JST equivalent, or type in the JST field to get the CST time. Both fields are editable.
3
Swap directions — Click ⇄ to instantly swap the conversion direction, or visit the JST to CST page.
4
Check the table — The 24-hour reference table shows every hour converted, with working hours marked green and late night/early morning marked orange.
5
Watch for day changes — Some times cross midnight, so a "+1 Day" or "-1 Day" note appears to show the date is different in the converted timezone.

❓ FAQ — CST to JST

What is the time difference between CST and JST?

Japan Standard Time (JST) is 15h ahead Central Standard Time (CST).

How do I convert CST to JST?

Use the converter above — type any time in the CST field and the JST result appears instantly. You can also refer to the 24-hour table on this page.

Is JST ahead or behind CST?

Japan Standard Time (JST) is 15h ahead Central Standard Time (CST).

How do I convert JST back to CST?

Simply type in the JST field in the bidirectional converter above — it works in both directions. Or visit the dedicated JST to CST converter page.

What is the best overlap time for meetings between CST and JST?

Use the meeting hours table above to find windows where both timezones fall within reasonable working hours.