World Time Zone Converter
Convert time between any world time zones — with IST quick presets, multi-zone display, and meeting planner.
⚡ IST Quick Presets
Source Time
Converted Times
3 zones selected
New York
EST/EDT · UTC-04:00
02:50 PM
Fri
London
GMT/BST · UTC+01:00
07:50 PM
Fri
Sydney
AEST/AEDT · UTC+10:00
04:50 AM
Sat
Select Target Timezones
📤 Share this tool
📖 Learn More About World Time Zone Converter
World Time Zone Converter — IST, EST, PST, GMT & More
Convert time between any two world time zones with IST quick presets, a live world clock for 28+ zones, and an intelligent meeting planner that finds overlapping working hours. Perfect for remote teams, freelancers, and international calls.
IST Quick Reference
- IST → EST: Subtract 10.5 hours (winter) or 9.5 hours (summer)
- IST → PST: Subtract 13.5 hours (winter) or 12.5 hours (summer)
- IST → GMT: Subtract 5.5 hours (winter) or 4.5 hours (BST)
- IST → SGT: Subtract 2.5 hours (Singapore is always UTC+8)
- IST → AEST: Add 4.5 hours (winter) or 5.5 hours (AEDT)
- IST → Dubai (GST): Subtract 1.5 hours (UAE is always UTC+4)
3 Tools in One
- Converter — Enter date + time in any source timezone, see results in multiple target zones simultaneously
- World Clock — Live clock showing current time in all 28 supported zones, with work-hour indicator
- Meeting Planner — 24-hour grid showing which hours overlap as working hours (9 AM–6 PM) across all selected zones
Daylight Saving Time Note
The US, UK, EU, and Australia observe Daylight Saving Time (DST), shifting clocks by 1 hour seasonally. This means the offset between India and these regions changes twice a year. This tool accounts for DST automatically — the converted time will be correct for any date you enter.
Frequently Asked Questions
What is IST?
IST stands for Indian Standard Time — UTC+5:30. India does not observe Daylight Saving Time. It is the only country that uses a half-hour offset from UTC.
Does the US observe Daylight Saving Time?
Yes. Most US states observe DST (summer time), shifting clocks 1 hour forward in March and back in November. This changes the offset — EST is UTC-5 in winter, EDT is UTC-4 in summer. The converter accounts for this automatically.
What is UTC vs GMT?
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) are effectively the same for everyday use. UTC is the modern standard, while GMT is the historical time zone of London. They differ by fractions of a second due to atomic clock calibrations.
How does the meeting planner work?
The meeting planner shows hours that fall within 9 AM–6 PM in all selected time zones simultaneously. These are the ideal slots for cross-timezone meetings where everyone is in regular working hours.
What is IST to EST time difference?
IST (UTC+5:30) is 10.5 hours ahead of EST (UTC-5) in winter, and 9.5 hours ahead of EDT (UTC-4) in summer. So if it's 9:00 AM IST, it's 10:30 PM EST (previous day) or 11:30 PM EDT.
What is IST to PST time difference?
IST (UTC+5:30) is 13.5 hours ahead of PST (UTC-8) in winter, and 12.5 hours ahead of PDT (UTC-7) in summer. If it's 9:00 AM IST, it's 7:30 PM PST the previous day.
What is IST to GMT/BST time difference?
IST is 5.5 hours ahead of GMT (UTC+0) in winter. When the UK observes BST (British Summer Time, UTC+1) from late March to late October, IST is 4.5 hours ahead. So 10:00 AM IST = 4:30 AM GMT or 5:30 AM BST.
How do I find a good meeting time between India and US?
Use the Meeting Planner tab. Select IST and your US city's time zone, then look for green-highlighted rows where all zones show working hours (9 AM–6 PM). Typically, early morning IST (8–10 AM) overlaps with late evening US time, which can sometimes work for async updates.
Which countries don't use Daylight Saving Time?
India, China, Japan, most of Southeast Asia, and countries near the equator don't observe DST. The US, most of Europe, Australia, and New Zealand do. This means the time difference between India and these regions changes twice a year.
What is the IST to AEST (Australia) time difference?
AEST (UTC+10) is 4.5 hours ahead of IST (UTC+5:30). AEDT (UTC+11, during daylight saving) is 5.5 hours ahead. So 9:00 AM IST = 1:30 PM AEST or 2:30 PM AEDT. Australia's DST runs from October to April (opposite to the northern hemisphere).