HST to SGT time converter

SGT is 18 hours ahead of HST. When it is 9:00 AM in HST, it is 3:00 AM (Sun, Oct 18) in SGT.

HST UTC-10

Saturday, October 17, 2026

SGT UTC+8

Sunday, October 18, 2026

HST
Hawaii-Aleutian Standard Time
Sat, Oct 17
UTC-10
SGT
Singapore Time
Sun, Oct 18
UTC+8+18h
Finding your time zone…
Shared working hours (9:00–18:00)

HST to SGT conversion table

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

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

Best time to call or meet

Both sides are at work from 3:00 PM – 6:00 PM in HST (9:00 AM – 12:00 PM in SGT).

Daylight saving time and the difference

The difference stays 18 hours all year.

More conversions

SGT to HSTHST to UTCHST to GMTHST to ESTHST to CSTHST to MSTHST to PSTHST to CETHST to MSKHST to GSTHST to PKTHST to ISTHST to PHT
UTC to SGTGMT to SGTEST to SGTCST to SGTMST to SGTPST to SGTCET to SGTMSK to SGTGST to SGTPKT to SGTIST to SGTPHT to SGT

Questions and answers

What is the time difference between HST and SGT?

SGT is 18 hours ahead of HST.

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

When it is 9:00 AM in HST, it is 3:00 AM (Sun, Oct 18) in SGT.

When is the best time to call SGT from HST?

Both sides are at work from 3:00 PM – 6:00 PM in HST (9:00 AM – 12:00 PM in SGT).

Does the time difference between HST and SGT change?

No. The difference stays 18 hours all year.