Timezone conversion
IST to CST Time — Convert India Standard Time to Central Standard Time (US)
CST is currently 10 hours and 30 minutes behind IST. The gap shifts across the year: around January CST is 11 hours and 30 minutes behind IST, and around July it is 10 hours and 30 minutes behind IST, because one or both zones observe daylight saving.
CST is currently 10 hours and 30 minutes behind IST.
Abbreviation disambiguation
On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.
On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.
Interactive converter
12:00PM
Select both cities to see the converted time.
Full IST to CST conversion table
| IST | CST |
|---|---|
| 12:00 AM | 1:30 PM(previous day) |
| 1:00 AM | 2:30 PM(previous day) |
| 2:00 AM | 3:30 PM(previous day) |
| 3:00 AM | 4:30 PM(previous day) |
| 4:00 AM | 5:30 PM(previous day) |
| 5:00 AM | 6:30 PM(previous day) |
| 6:00 AM | 7:30 PM(previous day) |
| 7:00 AM | 8:30 PM(previous day) |
| 8:00 AM | 9:30 PM(previous day) |
| 9:00 AM | 10:30 PM(previous day) |
| 10:00 AM | 11:30 PM(previous day) |
| 11:00 AM | 12:30 AM |
| 12:00 PM | 1:30 AM |
| 1:00 PM | 2:30 AM |
| 2:00 PM | 3:30 AM |
| 3:00 PM | 4:30 AM |
| 4:00 PM | 5:30 AM |
| 5:00 PM | 6:30 AM |
| 6:00 PM | 7:30 AM |
| 7:00 PM | 8:30 AM |
| 8:00 PM | 9:30 AM |
| 9:00 PM | 10:30 AM |
| 10:00 PM | 11:30 AM |
| 11:00 PM | 12:30 PM |
Daylight saving and how the gap changes
Around January CST is 11 hours and 30 minutes behind IST. Around July it is 10 hours and 30 minutes behind IST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.
Frequently asked questions
- Is CST ahead of or behind IST right now?
- CST is currently 10 hours and 30 minutes behind IST.
- What is the current IST to CST time difference?
- Right now the gap is 10 hours and 30 minutes — CST is 10 hours and 30 minutes behind IST.
- Does the IST → CST offset change during the year?
- Yes. Around January CST is 11 hours and 30 minutes behind IST; around July it is 10 hours and 30 minutes behind IST. The converter above always reflects the correct offset for the date you pick.
- Does IST observe daylight saving time?
- No — India Standard Time stays at a fixed UTC offset year-round.
- Does CST observe daylight saving time?
- CST is itself the standard-time form. Central Standard Time (US) is in force at UTC-6 through the winter months; outside that window the same zone is on CDT (UTC-5).
- What time is 3 AM IST in CST?
- 3:00 AM IST is 4:30 PM (previous day) CST.
- What time is 8 AM IST in CST?
- 8:00 AM IST is 9:30 PM (previous day) CST.
- What time is 9 AM IST in CST?
- 9:00 AM IST is 10:30 PM (previous day) CST.
- What time is 10 AM IST in CST?
- 10:00 AM IST is 11:30 PM (previous day) CST.
- What time is 11 AM IST in CST?
- 11:00 AM IST is 12:30 AM CST.
- What time is 12 PM (noon) IST in CST?
- 12:00 PM IST is 1:30 AM CST.
- What time is 2 PM IST in CST?
- 2:00 PM IST is 3:30 AM CST.
- What time is 3 PM IST in CST?
- 3:00 PM IST is 4:30 AM CST.
- What time is 4 PM IST in CST?
- 4:00 PM IST is 5:30 AM CST.
- What time is 5 PM IST in CST?
- 5:00 PM IST is 6:30 AM CST.
- What time is 9 PM IST in CST?
- 9:00 PM IST is 10:30 AM CST.
- What time is 10 PM IST in CST?
- 10:00 PM IST is 11:30 AM CST.
- When is the best time to schedule a call between IST and CST?
- IST and CST have no direct 09:00–17:00 overlap on the same calendar day. Consider early-morning or late-evening slots on one side, or an asynchronous handoff.
- What time zone does IST refer to?
- IST refers to India Standard Time (IANA: Asia/Kolkata).
- What time zone does CST refer to?
- CST refers to Central Standard Time (US) (IANA: America/Chicago).
- Is IST on this page the same as other zones that share the letters "IST"?
- On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.
- Is CST on this page the same as other zones that share the letters "CST"?
- On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.