IST to HST time converter

HST is 15 hours 30 minutes behind IST. When it is 9:00 AM in IST, it is 5:30 PM (Fri, Oct 16) in HST.

IST UTC+5:30

Saturday, October 17, 2026

HST UTC-10

Friday, October 16, 2026

IST
India Standard Time
Sat, Oct 17
UTC+5:30
HST
Hawaii-Aleutian Standard Time
Fri, Oct 16
UTC-10-15h 30m
Finding your time zone…
Shared working hours (9:00–18:00)

IST to HST conversion table

Every hour of today in IST and the matching time in HST. Light rows are typical working hours (9:00–18:00).

ISTHST
12:00 AM8:30 AM−1 day
1:00 AM9:30 AM−1 day
2:00 AM10:30 AM−1 day
3:00 AM11:30 AM−1 day
4:00 AM12:30 PM−1 day
5:00 AM1:30 PM−1 day
6:00 AM2:30 PM−1 day
7:00 AM3:30 PM−1 day
8:00 AM4:30 PM−1 day
9:00 AM5:30 PM−1 day
10:00 AM6:30 PM−1 day
11:00 AM7:30 PM−1 day
12:00 PM8:30 PM−1 day
1:00 PM9:30 PM−1 day
2:00 PM10:30 PM−1 day
3:00 PM11:30 PM−1 day
4:00 PM12:30 AM
5:00 PM1:30 AM
6:00 PM2:30 AM
7:00 PM3:30 AM
8:00 PM4:30 AM
9:00 PM5:30 AM
10:00 PM6:30 AM
11:00 PM7:30 AM

Best time to call or meet

Working hours don't overlap fully. The closest fit is 7:00 AM – 1:30 PM in IST (3:30 PM – 10:00 PM in HST): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference stays 15 hours 30 minutes all year.

More conversions

HST to ISTIST to UTCIST to GMTIST to ESTIST to CSTIST to MSTIST to PSTIST to CETIST to MSKIST to GSTIST to PKTIST to SGTIST to PHT
UTC to HSTGMT to HSTEST to HSTCST to HSTMST to HSTPST to HSTCET to HSTMSK to HSTGST to HSTPKT to HSTSGT to HSTPHT to HST

Questions and answers

What is the time difference between IST and HST?

HST is 15 hours 30 minutes behind IST.

What time is it in HST when it is 9 AM in IST?

When it is 9:00 AM in IST, it is 5:30 PM (Fri, Oct 16) in HST.

When is the best time to call HST from IST?

Working hours don't overlap fully. The closest fit is 7:00 AM – 1:30 PM in IST (3:30 PM – 10:00 PM in HST): working hours on one side, early or late on the other.

Does the time difference between IST and HST change?

No. The difference stays 15 hours 30 minutes all year.