GMT to HST Time Converter
Use this GMT to HST time converter to compare United Kingdom and United States time instantly. HST is 10 hours behind GMT, so 9:00 AM GMT becomes 11:00 PM (previous day) HST and 5:00 PM GMT becomes 7:00 AM HST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
GMT to HST Quick Facts
Use this GMT to HST converter to compare United Kingdom and United States time, check the 10 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.
How to Convert GMT to HST
Converting between Greenwich Mean Time and Hawaii Standard Time means accounting for a 10 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Greenwich Mean Time (UTC +0) that you want to convert. Hit "Now" to load the current GMT time instantly, or use "+1h" to step forward and compare.
The equivalent Hawaii Standard Time (UTC -10) time appears immediately. Since HST is 10 hours behind of GMT, most daytime conversions stay on the same calendar day.
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 Universal–United States calls.
Why Choose Our GMT to HST Converter
With 10 hours between GMT 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.
Late-night GMT times can land on a different date in HST because of the 10 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the GMT–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 GMT. Convert the event time to HST so you know exactly when to tune in — with a 10 hours difference, a morning event in Universal hits the evening in United States.
GMT to HST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Greenwich Mean Time to Hawaii Standard Time full day schedule
| Greenwich Mean Time | Hawaii Standard Time |
|---|---|
| 12:00 AM |
2:00 PM
(previous day)
|
| 1:00 AM |
3:00 PM
(previous day)
|
| 2:00 AM |
4:00 PM
(previous day)
|
| 3:00 AM |
5:00 PM
(previous day)
|
| 4:00 AM |
6:00 PM
(previous day)
|
| 5:00 AM |
7:00 PM
(previous day)
|
| 6:00 AM |
8:00 PM
(previous day)
|
| 7:00 AM |
9:00 PM
(previous day)
|
| 8:00 AM |
10:00 PM
(previous day)
|
| 9:00 AM |
11:00 PM
(previous day)
|
| 10:00 AM |
12:00 AM
|
| 11:00 AM |
1:00 AM
|
| 12:00 PM |
2:00 AM
|
| 1:00 PM |
3:00 AM
|
| 2:00 PM |
4:00 AM
|
| 3:00 PM |
5:00 AM
|
| 4:00 PM |
6:00 AM
|
| 5:00 PM |
7:00 AM
|
| 6:00 PM |
8:00 AM
|
| 7:00 PM |
9:00 AM
|
| 8:00 PM |
10:00 AM
|
| 9:00 PM |
11:00 AM
|
| 10:00 PM |
12:00 PM
|
| 11:00 PM |
1:00 PM
|
Popular GMT Time Converters
Explore more GMT conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
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.