IST to HST Time Converter
Use this IST to HST time converter to compare India and United States time instantly. HST is 15 hours and 30 minutes behind IST, so 9:00 AM IST becomes 5:30 PM (previous day) HST and 5:00 PM IST becomes 1:30 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.
IST to HST Quick Facts
Use this IST to HST converter to compare India and United States time, check the 15 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.
How to Convert IST to HST
Converting between India Standard Time and Hawaii Standard Time means accounting for a 15 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in India Standard Time (UTC +5:30) that you want to convert. Hit "Now" to load the current IST time instantly, or use "+1h" to step forward and compare.
The equivalent Hawaii Standard Time (UTC -10) time appears immediately. Since HST is 15 hours and 30 minutes behind of IST, 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 — useful when Daylight Saving Time changes the gap.
Why Choose Our IST to HST Converter
With 15 hours and 30 minutes between IST 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 IST 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 India–United States corridor.
The half-hour offset between IST (UTC +5:30) and HST (UTC -10) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.
Product launches, sports matches, and webinars are often announced in IST. Convert the event time to HST so you know exactly when to tune in — with a 15 hours and 30 minutes difference, a morning event in India hits the evening in United States.
IST to HST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
India Standard Time to Hawaii Standard Time full day schedule
| India Standard Time | Hawaii Standard Time |
|---|---|
| 12:00 AM |
8:30 AM
(previous day)
|
| 1:00 AM |
9:30 AM
(previous day)
|
| 2:00 AM |
10:30 AM
(previous day)
|
| 3:00 AM |
11:30 AM
(previous day)
|
| 4:00 AM |
12:30 PM
(previous day)
|
| 5:00 AM |
1:30 PM
(previous day)
|
| 6:00 AM |
2:30 PM
(previous day)
|
| 7:00 AM |
3:30 PM
(previous day)
|
| 8:00 AM |
4:30 PM
(previous day)
|
| 9:00 AM |
5:30 PM
(previous day)
|
| 10:00 AM |
6:30 PM
(previous day)
|
| 11:00 AM |
7:30 PM
(previous day)
|
| 12:00 PM |
8:30 PM
(previous day)
|
| 1:00 PM |
9:30 PM
(previous day)
|
| 2:00 PM |
10:30 PM
(previous day)
|
| 3:00 PM |
11:30 PM
(previous day)
|
| 4:00 PM |
12:30 AM
|
| 5:00 PM |
1:30 AM
|
| 6:00 PM |
2:30 AM
|
| 7:00 PM |
3:30 AM
|
| 8:00 PM |
4:30 AM
|
| 9:00 PM |
5:30 AM
|
| 10:00 PM |
6:30 AM
|
| 11:00 PM |
7:30 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.