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AST to IST converter

IST is 9 hours 30 minutes ahead of AST today. AST (Atlantic Standard Time) - currently UTC−4; IST (India Standard Time) - currently UTC+5:30.

The 09:00-18:00 workdays in AST and IST don't overlap at all, so one side always works early or late. Quick answers: 9 AM AST = 6:30 PM IST, 12 PM AST = 9:30 PM IST, 5 PM AST = 2:30 AM IST (next day).

AST · Atlantic Standard Time

UTC−4

IST · India Standard Time

UTC+5:30

Convert a time

IST
--:--

Working hours side by side

columns: AST hours
PING · 09–18 local MAYBE · 07–09, 18–21 NOT NOW · 21–07Outlined: everyone can be pinged

AST to IST conversion table

ASTISTVerdict in IST
12 AM · 00:009:30 AM · 09:30PING
1 AM · 01:0010:30 AM · 10:30PING
2 AM · 02:0011:30 AM · 11:30PING
3 AM · 03:0012:30 PM · 12:30PING
4 AM · 04:001:30 PM · 13:30PING
5 AM · 05:002:30 PM · 14:30PING
6 AM · 06:003:30 PM · 15:30PING
7 AM · 07:004:30 PM · 16:30PING
8 AM · 08:005:30 PM · 17:30PING
9 AM · 09:006:30 PM · 18:30MAYBE
10 AM · 10:007:30 PM · 19:30MAYBE
11 AM · 11:008:30 PM · 20:30MAYBE
12 PM · 12:009:30 PM · 21:30NOT NOW
1 PM · 13:0010:30 PM · 22:30NOT NOW
2 PM · 14:0011:30 PM · 23:30NOT NOW
3 PM · 15:0012:30 AM · 00:30 (next day)NOT NOW
4 PM · 16:001:30 AM · 01:30 (next day)NOT NOW
5 PM · 17:002:30 AM · 02:30 (next day)NOT NOW
6 PM · 18:003:30 AM · 03:30 (next day)NOT NOW
7 PM · 19:004:30 AM · 04:30 (next day)NOT NOW
8 PM · 20:005:30 AM · 05:30 (next day)NOT NOW
9 PM · 21:006:30 AM · 06:30 (next day)NOT NOW
10 PM · 22:007:30 AM · 07:30 (next day)MAYBE
11 PM · 23:008:30 AM · 08:30 (next day)MAYBE

Cities on AST

America/Halifax
HalifaxDartmouthLower SackvilleCharlottetownDowntown HalifaxHalifax West End

Cities on IST

Asia/Kolkata
MumbaiDelhiBangaloreHyderabadAhmedabadChennai

Other conversions

All converters
IST → ASTAST → ESTAST → EDTAST → PSTAST → PDTAST → CSTAST → CDTAST → MSTAST → GMTAST → UTCAST → BST

Questions

What is the time difference between AST and IST?

IST (India Standard Time) is 9 hours 30 minutes ahead of AST (Atlantic Standard Time) right now: UTC−4 versus UTC+5:30.

What is 9 AM AST in IST?

9:00 AM AST is 6:30 PM IST.

What is 5 PM AST in IST?

5:00 PM AST is 2:30 AM IST (next day).

Does daylight saving change the AST–IST difference?

Halifax switches between AST; next change Sunday, 14 March 2027 (UTC−4 → UTC−3). IST has no daylight saving; it stays UTC+5:30 all year.