IST to HST Time Converter - Live World Clock

Convert time between India Standard Time (IST) and Hawaii Standard Time (HST). See current time with live clocks.

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India (IST)

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11:51:40 PM
Sunday, February 1, 2026

United States (HST)

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08:21:40 AM
Sunday, February 1, 2026

Current Time Difference

IST is 15.5 hours ahead of HST

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What is IST (India Standard Time)?

India Standard Time (IST) is the time zone observed throughout India, with a time offset of UTC+5:30. India does not observe Daylight Saving Time.

Countries and Regions Using IST

Primary Country:

  • India - The entire country follows IST

Also Used By:

  • Sri Lanka

Key Facts about IST:

  • ✓ Over 1.4 billion people use IST
  • ✓ Major tech and financial hub
  • ✓ No DST observed
  • ✓ Single timezone across the country
  • ✓ Major Cities: Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad
  • ✓ UTC Offset: +5:30

What is HST (Hawaii Standard Time)?

Hawaii Standard Time (HST) used in Hawaii, UTC-10:00. No DST observed.

Countries and Regions Using HST

Primary Country:

  • United States
  • States: Hawaii

Key Facts about HST:

  • ✓ No Daylight Saving Time
  • ✓ Major tourism destination
  • ✓ Pacific island timezone
  • ✓ Major Cities: Honolulu, Pearl City, Hilo
  • ✓ UTC Offset: -10:00

IST to HST Time Difference

Standard Time Difference:

IST is 15.5 hours ahead

Common Use Cases:

  • • Business meetings between India and United States
  • • International collaboration across timezones
  • • Scheduling calls and conferences

Frequently Asked Questions

Which countries are in IST time zone?

India is the primary country using IST (+5:30). Other countries include: Sri Lanka.

Which countries are in HST time zone?

United States is the primary country using HST (-10:00).

How many hours is IST ahead of HST?

IST is 15.5 hours ahead of HST.

Does India observe Daylight Saving Time?

No, India does not observe Daylight Saving Time. IST remains +5:30 throughout the year.

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