San Francisco to Kolkata — 12 hours 30 minutes Difference
San Francisco is behind by 12 hours 30 minutes
San Francisco ↔ Kolkata
No overlap — one side will join outside working hours· Showing afternoon hours (12:00–20:00)
San Francisco
Kolkata
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Quick time conversions: San Francisco → Kolkata
Common reference points to help you plan across the time difference.
When San Francisco clocks show 7:00 PM, Kolkata reads 7:30 AM.(+1 day)
If I call at 8:00 AM from San Francisco, what time is it in Kolkata?—8:30 PM
2:00 PMin San Francisco→2:30 AMin Kolkata(+1 day)
Setting a 11:00 AM alarm in San Francisco? That's 11:30 PM for Kolkata.
7:00 AMin San Francisco→7:30 PMin Kolkata
If it's 4:00 PM where I am in San Francisco, what does Kolkata show?—4:30 AM(+1 day)
Frequently Asked Questions
Is Kolkata ahead of or behind San Francisco?
The time difference between San Francisco and Kolkata is 12 hours 30 minutes. San Francisco observes America/Los_Angeles while Kolkata observes Asia/Kolkata.
Is there a mutual working window between San Francisco and Kolkata?
There is no business hours overlap between San Francisco and Kolkata (09:00–17:00). One party will need to join outside normal hours.
Are there any upcoming DST changes for San Francisco or Kolkata?
Neither San Francisco nor Kolkata has a DST transition this week. The 12 hours 30 minutes gap remains consistent.
When it is 12:00 noon in San Francisco, what time is it in Kolkata?
At midday in San Francisco, clocks in Kolkata show 12:30 AM.
How accurate is this San Francisco to Kolkata converter?
Type any time in the input bar (e.g. "9am", "14:30") or use the slider. All locations including Kolkata update at the same time.
What local holidays should I watch out for in San Francisco?
Yes — San Francisco has an upcoming public holiday: Independence Day on July 3. Check the holiday panel above before confirming meetings.
What timezone is San Francisco in, and what timezone is Kolkata in?
America/Los_Angeles covers San Francisco; Asia/Kolkata covers Kolkata. This gives a 12 hours 30 minutes difference.
Are San Francisco and Kolkata east or west of UTC?
America/Los_Angeles covers San Francisco and Asia/Kolkata covers Kolkata. These IANA identifiers encode their UTC offsets, which currently differ by 12 hours 30 minutes.