HST to GMT Converter

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time and date on either side to see the conversion instantly.

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HST
Hawaii Standard Time
Date changes are handled automatically when conversions cross midnight.
GMT
Greenwich Mean Time
Date changes are handled automatically when conversions cross midnight.

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About HST to GMT Conversion

Converting time between HST and GMT requires understanding their time zone offsets and any daylight saving time adjustments. HST (HST) operates at UTC-10, while GMT (GMT) is set to UTC+0. This means GMT is 10 hours ahead HST. Note that due to the time difference, the date may change. When it's 5:17 PM HST on February 3, 2026, it's 3:17 AM GMT on February 4, 2026 in GMT. Europe/London observes daylight saving time, switching between GMT (UTC+0) and BST (UTC+1), while Pacific/Honolulu does not observe daylight saving time. Use this converter to quickly find the equivalent time in GMT for any time in HST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

  1. Select your source timezone from the "From timezone" dropdown (use search to find quickly)
  2. Enter the date and time you want to convert (or click "Today" and "Now" for current time)
  3. Select your target timezone from the "To timezone" dropdown
  4. The conversion updates automatically as you change inputs - no button needed!
  5. Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from HST

HST to EST HST to CST HST to MST HST to MDT HST to PST HST to AKST HST to CET HST to EET HST to MSK HST to IST HST to JST HST to CST-CHINA HST to HKT HST to SGT HST to GST HST to AEST HST to AWST HST to NZST HST to UTC HST to ART HST to BRT HST to PHT HST to BDT HST to KST HST to SAST HST to ICT HST to EAT HST to WAT HST to PKT

Frequently Asked Questions

What is the time difference between HST and GMT?

The time difference between HST and GMT is 10 hours. GMT is 10 hours ahead HST.

Is GMT ahead of or behind HST?

GMT is ahead of HST by 10 hours. When it's 12 PM in HST, it's 10:00 PM in GMT.

How many hours do you add to HST to get GMT?

You add 10 hours to HST to get GMT. For example, 12 PM HST + 10 hours = 10:00 PM GMT.

Does the HST to GMT time difference change during Daylight Saving Time?

Yes, the time difference can change during Daylight Saving Time (DST). GMT observes DST, which can affect the time difference during the transition periods in spring and fall.

What is 12 PM HST in GMT?

12 PM HST is 10:00 PM GMT. This conversion accounts for the 10-hour time difference between the two timezones.

Is HST the same throughout the year when converting to GMT?

No, the conversion between HST and GMT can vary during the year due to Daylight Saving Time. The time difference may change by 1 hour during DST transition periods (typically March and November), so always use a current timezone converter for accurate conversions.

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