--:--:--
—
San Juan · Barbados · Halifax (winter)
Find the best shared slot in the world time clock meeting planner.
Difference
IST vs AST
UTC → UTC
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—
Mumbai · Delhi · Bengaluru
AST to IST converter
AST to IST Converter
Convert AST (San Juan) to IST (Mumbai) now. Live clocks, the current time difference, and a simple meeting window — free.
America/Puerto_Rico
—
AST → IST
To · India Standard Time
—
Asia/Kolkata
Interactive diagram
Watch AST convert into IST
Drag the Atlantic hour. Watch the India clock change.
Atlantic
9:00 AM AST
—
IST ← AST
India
—
Full-day chart
AST to IST hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| Atlantic | India | UTC offsets |
|---|
Meeting times
Best AST to IST meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step AST to IST conversion
Four short steps to convert any AST time to IST.
Choose AST time
Select any hour in Atlantic Standard Time. Smart mode uses America/Puerto_Rico.
AST to IST conversion guide
AST to IST conversion guide
This AST to IST converter shows India Standard Time (UTC+5:30) for any Atlantic Standard Time (UTC−4) time. Use it to schedule between San Juan and Mumbai. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the AST and IST labels.
Atlantic
AST
UTC−4
San Juan · Barbados · Halifax (winter)
AST vs IST—
India
IST
UTC+5:30
Mumbai · Delhi · Bengaluru
What is AST to IST conversion?
AST to IST conversion turns a AST clock into the matching IST time. Use it for calls, travel, and teams in San Juan and Mumbai.
AST to IST time difference
IST is 9h 30m ahead of AST. Add 9h 30m to the AST time to get IST. The live clocks at the top show the current AST to IST gap.
AST vs IST
AST is UTC−4. IST is UTC+5:30. They are different names. If a region uses daylight saving, check the live labels.
AST to IST now / current time
Need ast to ist right now? Read the live clocks, or tap Use current time for an instant AST → IST result.
AST to IST time difference
Season / context — tap to explore
See how daylight saving can change this pair.
Atlantic—
—AST → IST
India—
Quick answers
Atlantic
Atlantic Standard Time (AST)
UTC−4
Atlantic Standard Time (AST) is UTC−4. Smart DST uses the city clock America/Puerto_Rico so daylight saving stays correct for San Juan · Barbados · Halifax (winter).
- Cities: San Juan · Barbados · Halifax (winter)
- City clock: America/Puerto_Rico
- Fixed AST: UTC−4
- On this page it pairs with IST (UTC+5:30)
India
India Standard Time (IST)
UTC+5:30
India Standard Time (IST) is UTC+5:30. Smart DST uses Asia/Kolkata for cities such as Mumbai · Delhi · Bengaluru.
- Cities: Mumbai · Delhi · Bengaluru
- City clock: Asia/Kolkata
- Fixed IST: UTC+5:30
- From AST: IST is 9h 30m ahead of AST
AST to IST FAQ
Common AST to IST questions
What is the AST to IST time difference?
IST is 9h 30m ahead of AST. Fixed labels: AST = UTC−4, IST = UTC+5:30. Add 9h 30m to the AST time to get IST.
How do I convert AST to IST quickly?
Add 9h 30m to the AST time to get IST. Example: 3:00 AM AST → 12:30 PM IST. Or use the live AST to IST converter above.
Is IST the same as AST?
No. AST is UTC−4 (San Juan · Barbados · Halifax (winter)). IST is UTC+5:30 (Mumbai · Delhi · Bengaluru).
What is a good AST to IST meeting time?
IST is ahead. Try 7:00–11:00 AM AST. That is about 4:30 PM–8:30 PM IST. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use AST and IST?
AST is common in San Juan · Barbados · Halifax (winter). IST is common in Mumbai · Delhi · Bengaluru. Smart DST uses America/Puerto_Rico and Asia/Kolkata.