Time Difference: Tokyo to San Francisco
See the current time in Tokyo (JST, UTC+9) and San Francisco (PST/PDT) side by side, with the live hour offset and a built-in time converter.
Use the Time Difference: Tokyo to San Francisco
Current Offset
Tokyo is 17 hours ahead of San Francisco (PST season)
Convert a Specific Time
Enter a Tokyo time to see the San Francisco equivalent, or vice versa
Enter any JST time
Enter any PST/PDT time
Meeting Overlap Finder
Business hours (09:00–18:00) highlighted — best overlap shaded
| Tokyo (JST) | San Francisco (PST) | Status |
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Quick Reference: Tokyo to San Francisco
Common JST hours and their PST equivalents
| Tokyo (JST) | San Francisco (PST) |
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Summary
Tokyo runs on JST (Japan Standard Time, UTC+9) year-round with no Daylight Saving Time. San Francisco runs on America/Los_Angeles time — PST (UTC-8) in winter and PDT (UTC-7) in summer. The offset between the two cities varies by season: Tokyo is 17 hours ahead during US Pacific Standard Time (roughly November through March) and 16 hours ahead during Pacific Daylight Time (roughly March through November). Use this tool to schedule calls between Japan and the Bay Area, coordinate remote teams, or plan travel between Tokyo and San Francisco.
How it works
- Your browser reads the current moment from your device clock.
- It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
- The same moment is converted to America/Los_Angeles time (PST or PDT depending on the season).
- The UTC offsets of both cities are compared to calculate the exact hour difference.
- Both clocks and the offset refresh every second in real time.
- DST transitions for San Francisco are handled automatically by the browser; Tokyo stays at UTC+9 year-round.
Use cases
- Scheduling video calls between Tokyo and San Francisco offices.
- Checking if a colleague in San Francisco is still at their desk when working from Tokyo.
- Planning Japan-California travel and comparing departure and arrival times.
- Remote teams coordinating daily standups across Japan and the Bay Area.
- Finding overlapping business hours for Tokyo-San Francisco meetings.
- Investors monitoring Tokyo and San Francisco financial market hours.
- Students and teachers arranging online lessons between Japan and Northern California.
- Converting a specific meeting time from JST to PST/PDT before sending a calendar invite.