SGT to HST Time Converter
Use this SGT to HST time converter to compare Singapore and United States time instantly. HST is 18 hours behind SGT, so 9:00 AM SGT becomes 3:00 PM (previous day) HST and 5:00 PM SGT becomes 11:00 PM (previous day) HST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
SGT to HST Quick Facts
Use this SGT to HST converter to compare Singapore and United States 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 SGT to HST
Converting between Singapore Time and Hawaii Standard 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 Singapore Time (UTC +8) that you want to convert. Hit "Now" to load the current SGT time instantly, or use "+1h" to step forward and compare.
The equivalent Hawaii Standard Time (UTC -10) time appears immediately. Since HST is 18 hours behind of SGT, conversions often cross midnight — look for the date-change label.
Click "Copy Time" to grab the HST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring Singapore–United States calls.
Why Choose Our SGT to HST Converter
With 18 hours between SGT and HST, 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 SGT evening at 9 PM is already the previous afternoon in HST. This converter flags date changes beside the result — critical when booking flights, hitting deadlines, or scheduling across the Singapore–United States corridor.
Daylight Saving adjustments can widen or narrow the SGT–HST 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 SGT. Convert the event time to HST so you know exactly when to tune in — with a 18 hours difference, a morning event in Singapore hits the evening in United States.
SGT to HST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Singapore Time to Hawaii Standard Time full day schedule
| Singapore Time | Hawaii Standard Time |
|---|---|
| 12:00 AM |
6:00 AM
(previous day)
|
| 1:00 AM |
7:00 AM
(previous day)
|
| 2:00 AM |
8:00 AM
(previous day)
|
| 3:00 AM |
9:00 AM
(previous day)
|
| 4:00 AM |
10:00 AM
(previous day)
|
| 5:00 AM |
11:00 AM
(previous day)
|
| 6:00 AM |
12:00 PM
(previous day)
|
| 7:00 AM |
1:00 PM
(previous day)
|
| 8:00 AM |
2:00 PM
(previous day)
|
| 9:00 AM |
3:00 PM
(previous day)
|
| 10:00 AM |
4:00 PM
(previous day)
|
| 11:00 AM |
5:00 PM
(previous day)
|
| 12:00 PM |
6:00 PM
(previous day)
|
| 1:00 PM |
7:00 PM
(previous day)
|
| 2:00 PM |
8:00 PM
(previous day)
|
| 3:00 PM |
9:00 PM
(previous day)
|
| 4:00 PM |
10:00 PM
(previous day)
|
| 5:00 PM |
11:00 PM
(previous day)
|
| 6:00 PM |
12:00 AM
|
| 7:00 PM |
1:00 AM
|
| 8:00 PM |
2:00 AM
|
| 9:00 PM |
3:00 AM
|
| 10:00 PM |
4:00 AM
|
| 11:00 PM |
5:00 AM
|
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Convert Other Time Zones to HST
Find the time difference from any major zone into Hawaii Standard Time. Use these pages when scheduling with United States from a different region.