Convert HST to IST — Time Difference Between Adak and India Standard Time
Drag the slider or click the time display to type a specific hour and instantly convert HST to IST — India Standard Time is 15:30 hours ahead of Adak. Scroll down to browse the full HST to IST conversion table, check what time 9 AM, 10 AM, 11 AM, or 12 PM in Adak is in Colombo, and use the date picker to compare times on any day for accurate scheduling.
HST
Adak
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IST
India Standard Time
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HST to IST Time Zone Difference — Hour-by-Hour Conversion Table
Scan each row to find what time any hour in Adak is in Colombo — tap the arrows to jump between days, click "Today" to reset, and use the color-coded bands to quickly spot overlapping work hours, early mornings, and late nights at a glance.
| HST (Adak) | IST (Colombo) |
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How to Convert HST to IST
Drag the slider on the HST timeline to pick your time — the IST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.
What Is the Time Difference Between HST and IST?
India Standard Time (IST) is 15:30 hours ahead of Adak (HST). To convert, add 15:30 hours — for example, 9:00 AM HST is 12:30 AM (next day) IST.
What Time Is It Now in Adak?
What Time Is It Now in Colombo?
HST to IST Quick Reference
HST to IST Meeting Planner
Use the color-coded table above to find overlapping work hours between Adak and Colombo. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.
Why Trust This HST to IST Converter?
Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.
Adak
- Abbreviation
- HST
- UTC Offset
- UTC-10:00
- City
- Adak
- Country
- United States
India Standard Time
- Abbreviation
- IST
- UTC Offset
- UTC+5:30
- City
- Colombo
- Country
- Sri Lanka