Time Conversion Calculator
IST to PDT Converter
Convert India Standard Time to PDT with date-aware logic, a 24-hour table, meeting planner, and copy-ready result.
Convert IST to PDT
Choose a date and time in India Standard Time. The calculator will show the matching PDT time.
Suggested meeting times
24-hour IST to PDT conversion table
Full-day conversion for the selected date.
| India Standard Time | PDT | Meeting note |
|---|---|---|
| Select a time and convert to generate the table. | ||
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IST to PDT: quick answer
To convert India Standard Time (IST) to Pacific Daylight Time (PDT), subtract 12 hours and 30 minutes. For example, 10:30 PM IST is 10:00 AM PDT. IST is fixed at UTC+05:30 and PDT is fixed at UTC-07:00 for this calculation.
This page converts specifically to PDT. During the standard-time season in Los Angeles or another Pacific Time location, use PST instead; PST is one hour behind PDT and sits 13 hours 30 minutes behind IST.
How to convert IST to PDT
- Start with the IST date and time.
- Subtract 12 hours and 30 minutes.
- If the result moves before midnight, use the previous PDT date.
- Retain the PDT label so it is not mistaken for PST.
Example: 6:00 AM IST – 12 hours 30 minutes = 5:30 PM PDT on the previous calendar date.
Why PDT and PST produce different answers
| Target label | UTC offset | Amount subtracted from IST |
|---|---|---|
| PDT | UTC-07:00 | 12 hours 30 minutes |
| PST | UTC-08:00 | 13 hours 30 minutes |
| Pacific Time | PDT or PST by date | Use a date-aware city or regional converter |
PDT identifies the daylight-time offset, while PST identifies the standard-time offset. A dated event in a Pacific Time location may use either one depending on local rules and the event date.
Common IST to PDT conversions
| IST | PDT | Date note |
|---|---|---|
| 6:00 AM | 5:30 PM | Previous day |
| 9:00 AM | 8:30 PM | Previous day |
| 12:00 PM | 11:30 PM | Previous day |
| 3:00 PM | 2:30 AM | Same day |
| 9:00 PM | 8:30 AM | Same day |
| 10:30 PM | 10:00 AM | Same day |
Previous-date and same-date rules
IST times earlier than 12:30 PM convert to the previous PDT calendar date. At exactly 12:30 PM IST, the result is 12:00 AM PDT on the same date. Include the date in invitations whenever India morning times are involved.
Best India to PDT meeting window
A practical India-side window is 6:30 PM-9:30 PM IST, corresponding to 6:00 AM-9:00 AM PDT. Teams with recurring meetings should confirm when the destination changes between PDT and PST.
Formula, methodology and verification
The calculation applies IST at UTC+05:30 and PDT at UTC-07:00, then subtracts the 750-minute difference. Verification covers half-hour arithmetic, previous-day rollover, month and year boundaries, 12-hour and 24-hour formatting, and reciprocal IST to PDT to IST test cases.
Frequently asked questions
How far behind IST is PDT?
PDT is exactly 12 hours and 30 minutes behind IST.
What is 10:30 PM IST in PDT?
10:30 PM IST is 10:00 AM PDT on the same calendar date.
What is 6:00 AM IST in PDT?
6:00 AM IST is 5:30 PM PDT on the previous calendar date.
Should I use PDT or PST for Los Angeles?
Use the abbreviation that applies on the event date. Los Angeles generally uses PDT during daylight time and PST during standard time.
Does IST change during the year?
No. Modern India Standard Time remains at UTC+05:30 throughout the year.
Related converters and official references
Need the reverse direction? Use the PDT to IST Converter. For winter Pacific Standard Time, use the IST to PST Converter. You can also compare the IST to EDT Converter.
References: IANA Time Zone Database, NIST local time FAQs, and CSIR-National Physical Laboratory India.