Compare IST vs PST
See the current IST–PST time difference, understand DST changes, and find the best meeting times across India and Pacific Time.
How to Find the Time Difference Between IST and PST
Open the IST vs PST comparison page: Go to https://www.xconvert.com/time-converter/ist-vs-pst to load a visual comparison grid with IST preloaded against PST on a 24-hour timeline. This page is useful when you are scheduling a support handoff between an engineering team in India and colleagues on the US West Coast, or checking whether a client call will fall inside normal office hours in both regions.
Add relevant comparison cities: Click + Add City and search for cities such as Mumbai, San Francisco, and Los Angeles to compare real business locations that use these time standards. This is especially helpful for software outsourcing, product management, cloud operations, and customer support teams, because many Indian tech teams work with California-based companies in SaaS, semiconductors, and digital media.
Drag to select a meeting window: Click Select to enter selection mode, then drag across the grid from 9:00 AM to 11:00 AM IST to highlight that range in purple. On standard Pacific time, that corresponds to 7:30 PM to 9:30 PM PST on the previous day, which immediately shows why a morning meeting in Bengaluru or Hyderabad often becomes an evening call for teams in Seattle, San Jose, or Los Angeles.
Export and share the chosen time: After selecting the range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, a distributed team can send the ICS file so everyone sees the event in their own local time automatically, while a recruiter or account manager can use Copy to clipboard or Gmail to quickly send a confirmed interview slot or client meeting across India and the US Pacific region.
IST vs PST Offset Explained
Indian Standard Time (IST) is UTC+5:30, and Pacific Standard Time (PST) is UTC-8:00, so the exact difference is 13 hours 30 minutes. That means IST is 13 hours 30 minutes ahead of PST. When it is 9:00 AM in India, it is 7:30 PM in PST the previous day, and when it is 6:00 PM in PST, it is 7:30 AM IST the next day.
The most important seasonal detail is that IST does not observe daylight saving time, while the US Pacific zone changes between PST (UTC-8) in winter and PDT (UTC-7) in summer. In the United States, daylight saving time typically begins on the second Sunday in March and ends on the first Sunday in November. During that DST period, the Pacific region is on Pacific Daylight Time, so the India–Pacific difference becomes 12 hours 30 minutes instead of 13 hours 30 minutes.
For example, in winter, a call at 8:00 AM IST is 6:30 PM PST on the previous day, which can work for end-of-day coordination with teams in California. In summer, the same 8:00 AM IST maps to 7:30 PM PDT on the previous day, shifting overlap slightly later for US participants. This one-hour seasonal change matters for daily standups, release coordination, NOC monitoring, and customer escalation coverage, especially for companies running 24/7 operations between India and the West Coast.
The IST side usually represents major Indian business centers such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, and Pune, all of which follow the same national time zone across a population of more than 1.4 billion people. The PST side commonly refers to cities such as Los Angeles, San Francisco, San Diego, Seattle, and Vancouver during standard-time discussions, although Seattle and Vancouver also switch to daylight time seasonally. This time relationship is heavily used in IT services, BPO, semiconductor design, e-commerce operations, gaming, and global customer support, where Indian teams often begin work as Pacific teams are finishing their day.
Because the overlap is limited, the most practical shared working window is often early morning in India and late afternoon or evening on the US West Coast. A common example is 7:30 AM to 10:00 AM IST, which corresponds to 6:00 PM to 8:30 PM PST in winter, or 7:00 PM to 9:30 PM PDT in summer. That window is often used for handoff meetings, sprint planning checkpoints, incident reviews, and account updates between offshore and onshore teams.
Frequently Asked Questions
What is the exact time difference between IST and PST?
IST is 13 hours 30 minutes ahead of PST when the Pacific zone is on standard time. Since IST is UTC+5:30 and PST is UTC-8:00, you add 13 hours 30 minutes to Pacific Standard Time to get India time. For example, 10:00 AM PST becomes 11:30 PM IST on the same calendar day.
Does the IST to PST time difference change during daylight saving time?
Yes, the difference changes because India does not use DST, but the US Pacific zone does. During the US daylight saving period, Pacific time becomes PDT (UTC-7), so India is then 12 hours 30 minutes ahead, not 13 hours 30 minutes. This change usually starts on the second Sunday in March and ends on the first Sunday in November.
When is the best meeting time between India and the US West Coast?
The best meeting window is usually early morning in India and late afternoon or evening in California or other Pacific locations. For instance, 8:00 AM IST works as 6:30 PM PST in winter or 7:30 PM PDT in summer, which is often manageable for cross-border product, engineering, and support teams. Midday in India usually falls in the middle of the night on the US West Coast, so it is less practical for live meetings.
If it is 9 AM IST, what time is it in PST?
If it is 9:00 AM IST, it is 7:30 PM PST on the previous day. This previous-day shift is one of the most important details to watch when booking meetings, flights, interviews, or deployment windows. For teams using shared calendars, exporting directly to Google Calendar or ICS helps avoid mistakes caused by date rollover.
How do I convert IST to PST accurately for a specific date?
Use the date picker at the top of the comparison page to choose the exact day, because the Pacific offset depends on whether the US is on standard time or daylight time. Then drag across the grid to mark your intended time range and compare how it lands in the Pacific row. This is especially useful around March and November, when US DST transitions can shift recurring meetings by one hour.
Why is IST 30 minutes offset instead of a whole hour?
IST is based on UTC+5:30, which reflects India’s national standard meridian at 82.5° east longitude. India uses a single national time zone rather than multiple regional zones, even though the country spans a large east-west distance. That half-hour offset is why IST-to-PST conversions often look less intuitive than conversions between two whole-hour zones.
Is PST the same as California time all year?
No, PST is only California’s time during the standard-time part of the year. For much of the year, California uses Pacific Daylight Time (PDT), which is UTC-7 rather than UTC-8. If you are scheduling with companies in San Francisco, Los Angeles, San Jose, or San Diego, always check the date so you know whether the correct comparison is IST vs PST or IST vs PDT.
What industries commonly need IST and PST conversion?
This conversion is very common in software development, IT services, technical support, cloud infrastructure, digital marketing, gaming, and financial back-office operations. Many firms run engineering or support teams from Bengaluru, Hyderabad, Pune, and Mumbai while working with customers or headquarters in San Francisco, Silicon Valley, Los Angeles, and Seattle. Accurate time conversion helps with release management, customer demos, interview scheduling, and 24/7 support rotations.