Time zone converter/CST to IST
CST to IST Converter
Central Standard Time to India Standard Time
India Standard Time (IST) is 11 hours 30 minutes ahead of U.S. Central Standard Time (CST). To convert CST to IST, add 11 hours 30 minutes. For current U.S. Central Time, the difference is 10 hours 30 minutes during CDT.
9 AM CST = 8:30 PM IST
- 9:00 AM CST→8:30 PM IST
- 10:00 AM CST→9:30 PM IST
- 11:00 AM CST→10:30 PM IST
- 1:00 PM CST→12:30 AM IST · next day
IST = CST + 11 hours 30 minutes · CST = IST − 11 hours 30 minutes
Popular conversions
From
Central Standard Time (CST)
CST · UTC−6
9:00 AM is a starting time, not the current time in Central Standard Time.
To
India Standard Time (IST)
IST · UTC+5:30
8:30 PM IST
IST is 11 hours 30 minutes ahead CST
11 hours 30 minutes ahead
Change the date or time above. The converted time is shown under To.
IST = CST + 11 hours 30 minutes · CST = IST − 11 hours 30 minutes
CST to IST always adds 11 hours 30 minutes — U.S. Central Standard Time and India Standard Time do not change with the seasons. Choose CT to IST when your invite says Central Time or Chicago time, and set the meeting date so summer daylight time is included. On this page, CST means U.S. Central Standard Time (not China Standard Time), and IST means India time, not Irish or Israel Standard Time.
Popular CST to IST Conversions
Common Central workday hours on U.S. Central Standard Time. For 9 AM and 9:30 AM CST, use the quick times above the converter.
11 AM CST to IST
11:00 AM CST is 10:30 PM India Standard Time on the same day. Late morning in Chicago, Dallas, or Houston is late evening across India.
10 AM CST to IST
10:00 AM CST is 9:30 PM IST the same day. During CDT, 10:00 AM Central Time is 8:30 PM IST — one hour earlier on the India side.
1 PM CST to IST
1:00 PM CST is 12:30 AM IST on the next day. From 12:30 PM CST onward, India has already crossed midnight.
2 PM CST to IST
2:00 PM CST is 1:30 AM IST the following day — early afternoon in the U.S. Central region is the middle of the night in India, so same-day calls usually need an earlier Central slot.
CST to IST Conversion Table
Every hour of the day on U.S. Central Standard Time (six hours behind UTC). For Central Time on a specific date — including daylight saving — choose CT to IST above. Highlighted rows are times people convert often. From 12:30 PM CST onward, India time falls on the next calendar day.
| CST | IST | Note |
|---|---|---|
| 12:00 AM CST | 11:30 AM IST | — |
| 1:00 AM CST | 12:30 PM IST | — |
| 2:00 AM CST | 1:30 PM IST | — |
| 3:00 AM CST | 2:30 PM IST | — |
| 4:00 AM CST | 3:30 PM IST | — |
| 5:00 AM CST | 4:30 PM IST | — |
| 6:00 AM CST | 5:30 PM IST | — |
| 7:00 AM CST | 6:30 PM IST | — |
| 8:00 AM CST | 7:30 PM IST | — |
| 9:00 AM CST | 8:30 PM IST | — |
| 10:00 AM CST | 9:30 PM IST | Popular |
| 11:00 AM CST | 10:30 PM IST | Popular |
| 12:00 PM CST | 11:30 PM IST | — |
| 1:00 PM CST | 12:30 AM IST · Next day | Next day |
| 2:00 PM CST | 1:30 AM IST · Next day | Next day |
| 3:00 PM CST | 2:30 AM IST · Next day | Next day |
| 4:00 PM CST | 3:30 AM IST · Next day | Next day |
| 5:00 PM CST | 4:30 AM IST · Next day | Next day |
| 6:00 PM CST | 5:30 AM IST · Next day | Next day |
| 7:00 PM CST | 6:30 AM IST · Next day | Next day |
| 8:00 PM CST | 7:30 AM IST · Next day | Next day |
| 9:00 PM CST | 8:30 AM IST · Next day | Next day |
| 10:00 PM CST | 9:30 AM IST · Next day | Next day |
| 11:00 PM CST | 10:30 AM IST · Next day | Next day |
Central Time to India Time
U.S. Central Time (CT) switches between Central Standard Time (CST) and Central Daylight Time (CDT). India Standard Time does not change with the seasons. India is 11 hours 30 minutes ahead of CST and 10 hours 30 minutes ahead of CDT.
| Label | Compared with UTC | Compared with India |
|---|---|---|
| CST | 6 hours behind | India ahead by 11:30 |
| CDT | 5 hours behind | India ahead by 10:30 |
| IST | 5 hours 30 minutes ahead | No daylight saving |
| Central clock | India time |
|---|---|
| 9:00 AM CST | 8:30 PM IST |
| 9:00 AM CDT | 7:30 PM IST |
| 10:00 AM CST | 9:30 PM IST |
| 10:00 AM CDT | 8:30 PM IST |
9 AM CT to IST
9 AM Central Time is 7:30 PM IST during CDT and 8:30 PM IST during CST. The answer depends on the date — choose CT to IST above and set the day of the meeting.
10 AM CT to IST
10 AM Central Time is 8:30 PM IST during CDT and 9:30 PM IST during CST. Choose CT to IST when the invite says Central Time rather than CST.
CST vs CDT to IST
Why is India 10.5 or 11.5 hours ahead of Central Time? CST is Central Standard Time, six hours behind UTC. CDT is Central Daylight Time, five hours behind UTC. India stays on IST, five and a half hours ahead of UTC, all year. CST to IST never changes: always 11 hours 30 minutes ahead. Current Central Time to India does change — 11 hours 30 minutes while Chicago is on CST, then 10 hours 30 minutes from mid-March to early November on CDT. CST is not the same as Central Time all year: Central Time means CST in winter and CDT in summer.
- CST is 6 hours behind UTC · India is 11 hours 30 minutes ahead of CST
- CDT is 5 hours behind UTC · India is 10 hours 30 minutes ahead of CDT
- CST to IST stays the same all year
- CT to IST follows the date (CST or CDT)
When daylight saving ends, Chicago clocks fall back and 1:30 AM happens twice. On 1 November 2026, the first 1:30 AM (still CDT) is 12:00 PM IST, and the second 1:30 AM (now CST) is 1:00 PM IST. Both are real local times — if your meeting lands in that repeated hour, check which side of the change the invite means.
If the invite names CST, stay on CST to IST. If it says Central Time or Chicago time, choose CT to IST and pick the date.
Does CST Mean Central or China Standard Time?
CST can mean more than one place. This page uses U.S. Central Standard Time (six hours behind UTC), not China Standard Time (eight hours ahead of UTC). IST here means India Standard Time only.
| CST meaning | Compared with UTC | Compared with India |
|---|---|---|
| U.S. Central Standard Time | 6 hours behind | India ahead by 11:30 |
| China Standard Time | 8 hours ahead | China ahead of India by 2:30 |
Example: 9:00 AM U.S. CST is 8:30 PM IST. 9:00 AM China Standard Time is 6:30 AM IST. If you mean China time, open the main time zone converter and choose Shanghai — this page stays on U.S. Central.
Central Time to India Meeting Planner
U.S. Central mornings still land in India's evening, but the gap is shorter than on the West Coast. 7–9 AM Central is often easier to schedule than later hours, though some India teams will already be wrapping up. Each row shows India time during daylight time first (mid-March to early November), then standard time.
| Central | India Time | For calls |
|---|---|---|
| 7:00 AM | 5:30 PM / 6:30 PM | Easier window — early evening in India |
| 8:00 AM | 6:30 PM / 7:30 PM | Easier window — evening in India |
| 9:00 AM | 7:30 PM / 8:30 PM | Still workable — mid-evening in India |
| 10:00 AM | 8:30 PM / 9:30 PM | Late evening for many India teams |
| 11:00 AM | 9:30 PM / 10:30 PM | Late for India |
| 12:00 PM | 10:30 PM / 11:30 PM | Very late for India |
Current Central and India Time
Central Time and India Standard Time right now. The Central clock shows CDT or CST for this season; India stays on IST all year. The CST and IST times below stay on standard time all year, same as the conversion table.
Central Time
--:--
CT
India Standard Time
--:--
IST
CST
UTC−6
Standard time all year
IST
UTC+5:30
Standard time all year
About These Time Zones
Open a zone page for a standard-time label such as EST, or a regional clock like Eastern Time that follows daylight saving for the date you pick.
CST to IST FAQ
- What is 9 AM CST in IST?
- 9 AM CST is 8:30 PM IST the same day. Add 11 hours 30 minutes — mid-morning on U.S. Central Standard Time is evening in India.
- What is 10 AM CST in IST?
- 10 AM CST is 9:30 PM IST the same day. Add 11 hours 30 minutes — late morning in places like Chicago or Dallas is late evening in India.
- What is 11 AM CST in IST?
- 11 AM CST is 10:30 PM IST the same day. Add 11 hours 30 minutes — late morning Central Standard Time is late evening in India.
- How many hours is IST ahead of CST?
- IST is 11 hours 30 minutes ahead of U.S. Central Standard Time (CST). CST is six hours behind UTC and IST is five and a half hours ahead, so add 11 hours 30 minutes to a CST time to get IST.
- Is India 10.5 or 11.5 hours ahead of Central Time?
- Both, depending on the season. India is 11 hours 30 minutes ahead of CST (the Central winter clock) and 10 hours 30 minutes ahead of CDT (the summer clock). India never changes its clocks — only the Central side moves.
- Does CST to IST change with daylight saving time?
- No. U.S. CST and IST keep the same clocks all year, so CST to IST is always 11 hours 30 minutes. What changes is current Central Time to India: while the U.S. is on CDT, India is 10 hours 30 minutes ahead instead.
- What is CT to IST?
- CT to IST converts current U.S. Central Time to India Standard Time — CDT in summer, CST in winter — while India stays on IST all year. That is 10 hours 30 minutes during daylight saving and 11 hours 30 minutes during standard time. Choose CT to IST at the top of this page and pick a date to see it.
- Does CST mean China Standard Time?
- Not on this page. Here CST means U.S. Central Standard Time (six hours behind UTC), not China Standard Time (eight hours ahead of UTC). 9:00 AM U.S. CST is 8:30 PM IST; 9:00 AM China Standard Time is 6:30 AM IST. If you mean China time, open the main converter on the home page and choose Shanghai.