9 AM PST to IST

Twin Clock Converter

Common Call Times

One-click presets for the most-searched Pacific meeting slots.

PST → IST Hour-by-Hour Table

Need the reverse? Go from IST to PST instead.

The Offset Formula

Zone Reference

Offsets per the IANA tz database. India anchored to 82.5° E meridian; US DST per the Energy Policy Act 2005.

No saved conversions yet. Tap "Save to History" to remember up to six PST → IST lookups.

How to Convert PST to IST with the Twin Clocks

1. Set the Pacific time — type it into the time field or drag the left clock's face to snap to the hour.
2. Pick the Pacific mode: PST (UTC-8) for November–March or PDT (UTC-7) for March–November per the Energy Policy Act 2005 schedule.
3. Read the India time off the right-hand clock — it follows the +13:30 (PST) or +12:30 (PDT) offset automatically, including a "next day" flag when it rolls past midnight.
4. Check the verdict band: green means India business hours, amber means a workable edge, red means India is asleep.
5. Save the snapshot to compare call windows, or use a preset chip for the most common meeting slots.

Why This Converter Exists

In 2026, a product manager in San Jose schedules a daily 9 AM Pacific stand-up with an engineering pod in Bengaluru and Pune. The recurring question — what time does 9 AM PST actually land in India, and is anyone awake to take the call — is precisely what this twin-clock converter answers. India Standard Time (IST) is fixed at UTC+5:30 and observes no daylight saving, so the only moving part is whether California is currently on Pacific Standard Time (PST, UTC-8) or Pacific Daylight Time (PDT, UTC-7).

Indian Standard Time was standardised in 1906, anchored to the 82.5° E meridian that passes through Mirzapur near Allahabad. The half-hour offset (the :30 that confuses newcomers) was chosen as a single national compromise between the older Bombay Time and Calcutta Time used under the British Raj. Because the offset is +5:30 rather than a whole number of hours, every PST-to-IST conversion lands on a half-hour: 9:00 AM PST becomes 10:30 PM IST under PDT and 11:30 PM IST under PST.

Pacific Time, by contrast, swings twice a year. Under the US Energy Policy Act of 2005, daylight saving in the United States begins on the second Sunday of March and ends on the first Sunday of November. From March to November, California runs on PDT (UTC-7); the rest of the year it runs on PST (UTC-8). That single hour is why 9 AM PST to IST is 11:30 PM in winter but 10:30 PM in summer — the IST clock never moves, so the whole shift comes from the Pacific side.

The IANA time zone database (the tz database maintained by Paul Eggert and contributors) encodes Pacific Time as America/Los_Angeles and India as Asia/Kolkata. Asia/Kolkata has carried a flat +05:30 rule since 1945, with no daylight-saving transitions, which is why software that relies on the IANA rules never has to special-case India for DST. America/Los_Angeles carries the full US DST ruleset, so a correct converter must know today's date — or let you toggle PST/PDT manually, as the twin clocks here do.

GMT and UTC are often used interchangeably in calling apps, but they are not identical: GMT is a time zone (UTC+0, the Greenwich meridian), while UTC is the atomic time standard that the world's clocks are disciplined to. IST is UTC+5:30 and Pacific Time is referenced to UTC as well, which is why the cleanest mental model is to convert through UTC: PST is UTC minus 8, IST is UTC plus 5:30, so the gap is a fixed 13 hours 30 minutes in winter and 12 hours 30 minutes in summer.

The practical reason this page exists is the call-window problem. A 9 AM Pacific meeting is civilised for California but lands at 10:30–11:30 PM in India — late, but workable for engineers who keep evening hours. Shift the Pacific clock earlier and you push India past midnight; shift it later and India is asleep. The twin analog dials let you drag either hand and immediately see the partner clock follow, with a verdict band that scores how humane the resulting India time actually is.

Distributed teams have leaned on this exact conversion since the offshore-IT boom of the late 1990s, when firms like Infosys, Wipro, and TCS built delivery centres that overlapped with US West Coast clients. The overlap window between California morning and India evening is famously narrow — roughly 8:30 AM to 10:30 AM Pacific maps to a tolerable 9:00 PM to 11:00 PM India evening (PDT). This tool turns that institutional knowledge into a draggable, shareable answer for any hour of the day.