Time Conversion Calculator
CET to IST Converter
Convert CET to India Standard Time with date-aware logic, a 24-hour table, meeting planner, and copy-ready result.
Convert CET to IST
Choose a date and time in CET. The calculator will show the matching India Standard Time time.
Suggested meeting times
24-hour CET to IST conversion table
Full-day conversion for the selected date.
| CET | India Standard Time | Meeting note |
|---|---|---|
| Select a time and convert to generate the table. | ||
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CET to IST: quick answer
To convert Central European Time (CET) to India Standard Time (IST), add 4 hours and 30 minutes. For example, 9:00 AM CET is 1:30 PM IST. This calculator treats CET as the fixed standard-time offset UTC+01:00 and IST as UTC+05:30.
If the European location is observing Central European Summer Time (CEST) at UTC+02:00, add 3 hours and 30 minutes instead. Use the timezone label stated by the source rather than assuming that CET means current local time in every European city.
How to convert CET to IST
- Start with the date and time explicitly labelled CET or UTC+01:00.
- Add 4 hours and 30 minutes.
- If the result reaches or passes midnight, advance the IST date by one day.
- Keep both timezone abbreviations with the final result.
Example: 8:00 PM CET + 4 hours 30 minutes = 12:30 AM IST on the following calendar date.
CET and CEST are not interchangeable
| European label | UTC offset | Difference from IST |
|---|---|---|
| Central European Time (CET) | UTC+01:00 | IST is 4:30 ahead |
| Central European Summer Time (CEST) | UTC+02:00 | IST is 3:30 ahead |
| Paris, Berlin or regional local time | Changes by date | Use an IANA location and event date |
The European Commission states that participating EU countries move to summer time on the last Sunday of March and return to standard time on the last Sunday of October. CET is the standard-time label; CEST is the summer-time label. A date-aware city converter is the safer choice when an invitation names a city instead of an abbreviation.
Common CET to IST conversions
| CET | IST | Date note |
|---|---|---|
| 6:00 AM | 10:30 AM | Same day |
| 8:00 AM | 12:30 PM | Same day |
| 9:00 AM | 1:30 PM | Same day |
| 12:00 PM | 4:30 PM | Same day |
| 4:00 PM | 8:30 PM | Same day |
| 8:00 PM | 12:30 AM | Next day |
Calendar-date changes
CET times from 7:30 PM onward convert to the next IST calendar date. For example, 11:00 PM CET is 3:30 AM IST the next day. Include the converted date in travel plans, support handoffs and international meeting invitations.
Best CET to IST meeting window
A practical shared-business-hours window is 9:00 AM-1:30 PM CET, corresponding to 1:30 PM-6:00 PM IST. For recurring meetings tied to a European city, review the schedule when that location moves between CET and CEST.
Formula, methodology and verification
The calculation subtracts the CET offset of +60 minutes from the IST offset of +330 minutes, producing a fixed difference of 270 minutes. Verification covers half-hour arithmetic, same-day and next-day results, midnight and year-boundary rollover, 12-hour and 24-hour formats, and reciprocal CET to IST to CET test cases.
When this fixed-offset converter is appropriate
Use this page when the source explicitly specifies CET, Central European Time, UTC+01:00, or a standard-time schedule. Do not use it as a year-round substitute for the current time in Paris, Berlin, Rome, Madrid or another seasonal European location. IANA location identifiers are designed to represent historical and current regional clock rules.
Frequently asked questions
How far ahead is IST from CET?
India Standard Time is exactly 4 hours and 30 minutes ahead of fixed Central European Time.
What is 9:00 AM CET in India?
9:00 AM CET is 1:30 PM IST on the same calendar date.
What is 8:00 PM CET in IST?
8:00 PM CET is 12:30 AM IST on the following calendar date.
Is CET the same as CEST?
No. CET is UTC+01:00, while CEST is UTC+02:00. Their India conversions differ by one hour.
Does India observe daylight saving time?
No. Modern India Standard Time remains at UTC+05:30 throughout the year.
Related converters and official references
Starting with India time? Use the IST to CET Converter. For fixed UTC, use the UTC to IST Converter. For Greenwich Mean Time, use the GMT to IST Converter.
References: European Commission summer-time arrangements, IANA Time Zone Database, and CSIR-NPL Indian Standard Time metrology.