🕒 PST to IST Converter

What is the PST to IST Converter?

PST and IST are not simply two points a fixed number of hours apart, because only one of the two zones moves its clocks. Pacific Time in the United States (covering cities like Los Angeles, San Francisco, Seattle and San Diego) switches between Pacific Standard Time (UTC-08:00) in winter and Pacific Daylight Time (UTC-07:00) in summer, shifting clocks forward in March and back in November. India Standard Time (UTC+05:30) covers the entire country from a single time zone and has not observed daylight saving since 1945, so it sits at the same offset every day of the year. The practical effect is that the gap between the two places is 13.5 hours for about four months and 12.5 hours for about eight months, and the switch happens on different calendar dates than most of the rest of the world expects because the US and India do not coordinate their clock-change schedules with each other.

Getting the date right matters more than most people assume when converting PST to IST. The United States begins Daylight Saving Time on the second Sunday of March and ends it on the first Sunday of November, per the rules set out in the Energy Policy Act of 2005. A meeting scheduled for the last week of a month can straddle that boundary without anyone noticing, since India-side participants have no daylight-saving cue of their own to prompt a re-check. This converter avoids that mistake by computing the actual UTC offset for America/Los_Angeles on the specific date entered, rather than applying a single remembered number like "12.5 hours" or "13.5 hours" year-round.

Under the hood the tool uses the Intl.DateTimeFormat API that ships with every modern browser, which draws on the IANA Time Zone Database, the same reference dataset operating systems, phones and server software use to track historical and current time zone rules worldwide. The wall-clock numbers you type for Los Angeles are first treated as a rough UTC guess, the tool checks what offset America/Los_Angeles actually observes at that moment, then it corrects the instant using that real offset. The corrected instant is then rendered as India local time using the Asia/Kolkata zone identifier. No fixed +12.5 or +13.5 constant is hardcoded anywhere in the logic, so the pst to ist result stays correct through every DST changeover without needing an annual update.

This kind of pst to ist conversion comes up constantly for anyone bridging work across the US West Coast and India: a support team handing off a shift, a developer joining a standup, a student registering for a live class, or a family coordinating a call. Because the calculation runs entirely in your browser, nothing about the date, time or purpose of your conversion is sent anywhere.

When to use it

• Scheduling a call or meeting between a US West Coast office and an India-based team without misjudging the current PST/PDT gap.
• Converting a webinar, live class, or product launch time listed in Pacific Time into the correct India Standard Time for attendees.
• Working out shift handoff times for support, engineering, or operations teams split between the US West Coast and India.
• Checking whether a flight departure or arrival time, quoted in US Pacific Time, lands at a reasonable hour in India.

How to use the PST to IST Converter

1. Enter the date and time exactly as a clock in Los Angeles (America/Los_Angeles) would show it.
2. Or click "Use current Pacific time" to fill in the present moment automatically.
3. Read the equivalent India Standard Time shown below, including whether the US side is on PST or PDT and the exact hour gap for that date.
4. Use the Copy button to grab the converted IST result for a message, calendar invite, or note.

Formula & method

Worked examples

PST/PDT to IST hour gap by season

Quick reference: common Pacific Time hours converted to IST (PDT, summer)

Common mistakes to avoid

• Applying a single fixed offset all year. Treating the pst to ist gap as always 12.5 hours (or always 13.5) breaks for roughly four months of the year because Pacific Time itself changes with US daylight saving while India Standard Time does not move at all. Always check which side of the DST boundary your date falls on.
• Forgetting the date can roll over. Because IST is ahead of Pacific Time, most times in Los Angeles land on the next calendar day in India, and evening or night times can even skip forward by a full day. Always confirm the resulting date, not just the clock time.
• Confusing PST with the current Pacific offset. "PST" specifically means Pacific Standard Time (UTC-08:00, winter). If a meeting is scheduled in summer, the US West Coast is actually on PDT (UTC-07:00), not PST, even though people casually say "PST" year-round out of habit.
• Using a generic 12-hour offset from memory. India is often loosely remembered as "about 12 or 13 hours ahead" of the US West Coast, which glosses over exactly which offset applies on a given date and ignores the half-hour IST component entirely. The 30-minute component is not a rounding error, it is a genuine feature of India Standard Time.

Glossary

PST

Pacific Standard Time, the US Pacific zone offset of UTC-08:00 used outside the daylight saving window.

PDT

Pacific Daylight Time, the US Pacific zone offset of UTC-07:00 used during the daylight saving window, roughly mid-March to early November.

IST

India Standard Time, a single fixed offset of UTC+05:30 used across all of India with no daylight saving adjustment.

UTC

Coordinated Universal Time, the neutral global reference every time zone offset is measured against.

IANA time zone database

The standardized, regularly updated dataset of time zone rules and historical offsets that browsers and operating systems use to resolve zones like America/Los_Angeles correctly.

Daylight Saving Time (DST)

The seasonal practice of moving clocks forward by an hour in spring and back in autumn, observed by the continental US but not by India.

Frequently asked questions