HST to SGT Time Converter
Use this HST to SGT time converter to compare United States and Singapore time instantly. SGT is 18 hours ahead of HST, so 9:00 AM HST becomes 3:00 AM (next day) SGT and 5:00 PM HST becomes 11:00 AM (next day) SGT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
HST to SGT Quick Facts
Use this HST to SGT converter to compare United States and Singapore time, check the 18 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.
How to Convert HST to SGT
Converting between Hawaii Standard Time and Singapore Time means accounting for a 18 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Hawaii Standard Time (UTC -10) that you want to convert. Hit "Now" to load the current HST time instantly, or use "+1h" to step forward and compare.
The equivalent Singapore Time (UTC +8) time appears immediately. Since SGT is 18 hours ahead of HST, conversions often cross midnight — look for the date-change label.
Click "Copy Time" to grab the SGT result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring United States–Singapore calls.
Why Choose Our HST to SGT Converter
With 18 hours between HST and SGT, business-hours overlap is limited. This tool instantly shows which hours work on both sides, so you can lock in a meeting without a chain of "does 3 PM work for you?" emails.
A HST evening at 9 PM is already the next morning in SGT. This converter flags date changes beside the result — critical when booking flights, hitting deadlines, or scheduling across the United States–Singapore corridor.
Daylight Saving adjustments can widen or narrow the HST–SGT gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in HST. Convert the event time to SGT so you know exactly when to tune in — with a 18 hours difference, a morning event in United States falls during work hours in Singapore.
HST to SGT Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Hawaii Standard Time to Singapore Time full day schedule
| Hawaii Standard Time | Singapore Time |
|---|---|
| 12:00 AM |
6:00 PM
|
| 1:00 AM |
7:00 PM
|
| 2:00 AM |
8:00 PM
|
| 3:00 AM |
9:00 PM
|
| 4:00 AM |
10:00 PM
|
| 5:00 AM |
11:00 PM
|
| 6:00 AM |
12:00 AM
(next day)
|
| 7:00 AM |
1:00 AM
(next day)
|
| 8:00 AM |
2:00 AM
(next day)
|
| 9:00 AM |
3:00 AM
(next day)
|
| 10:00 AM |
4:00 AM
(next day)
|
| 11:00 AM |
5:00 AM
(next day)
|
| 12:00 PM |
6:00 AM
(next day)
|
| 1:00 PM |
7:00 AM
(next day)
|
| 2:00 PM |
8:00 AM
(next day)
|
| 3:00 PM |
9:00 AM
(next day)
|
| 4:00 PM |
10:00 AM
(next day)
|
| 5:00 PM |
11:00 AM
(next day)
|
| 6:00 PM |
12:00 PM
(next day)
|
| 7:00 PM |
1:00 PM
(next day)
|
| 8:00 PM |
2:00 PM
(next day)
|
| 9:00 PM |
3:00 PM
(next day)
|
| 10:00 PM |
4:00 PM
(next day)
|
| 11:00 PM |
5:00 PM
(next day)
|
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Find the time difference from any major zone into Singapore Time. Use these pages when scheduling with Singapore from a different region.