Convert IST to HST — Time Difference Between India Standard Time and Hawaii Standard Time

How to Convert IST to HST

Drag the slider on the IST timeline to pick your time — the HST 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 IST and HST?

Hawaii Standard Time (HST) is 15:30 hours behind India Standard Time (IST). To convert, subtract 15:30 hours — for example, 9:00 AM IST is 5:30 PM (previous day) HST.

IST to HST Quick Reference

IST to HST Meeting Planner

Use the color-coded table above to find overlapping work hours between Kolkata and Honolulu. 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 IST to HST 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.