India time to Perth time

The time difference

Perth is 2 hours 30 minutes ahead of India all year. Neither place changes its clocks, so the difference never moves. India is always UTC+5:30, known as IST.

India time to Perth time

Good hours to start a call (8 am to 9 pm in both places): from 8:00 am to 6:00 pm India time. Hours that start inside office time (9 am to 6 pm) in both: 9:00 am to 3:00 pm India time.

Worked examples

All year. An office that closes at 6:00 pm in India closes when it is 8:30 pm in Perth. A 9:00 am start in Perth is 6:30 am in India, and its 6:00 pm finish is 3:30 pm in India. A message sent at 10:30 pm from India lands at 1:00 am the next day in Perth.

When the date is different

Perth is ahead of India, so for 2 hours 30 minutes of every day the calendar date differs: from 9:30 pm India time until midnight, Perth has already moved to the next day.

Why the gap is what it is

Indian Standard Time follows the sun at longitude 82.5° east. The zone that Perth belongs to has its largest city, Perth, at about 115.9° east. The sun crosses the sky between those two lines in about 2 hours 13 minutes. Clock time rounds that to a tidy figure: 2 hours 30 minutes. The two figures differ because every country picks a round offset that suits its whole territory, and some add summer time on top.

Rows marked in colour fall between 8 am and 9 pm in both places. Dates are from the IANA time zone database 2026f.

More

Read about time in Perth or time in India. Other conversions from India: New York, Chicago, Denver, Los Angeles, Toronto, London, Paris, Berlin, Moscow, Dubai, Riyadh, Doha, Kuwait, Karachi, Kathmandu, Dhaka, Colombo, Singapore, Kuala Lumpur, Bangkok, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Auckland, Johannesburg, Nairobi.