Mumbai to London Time
IST to GMT Converter — 9 AM IST is 3:30 AM GMT
Mumbai is 5 hours and 30 minutes ahead of London. Convert any time between Mumbai (IST) and London (GMT/BST) instantly.
Mumbai
India
London
United Kingdom
Add Time Zones to Compare
Time Zone Comparison
Mumbai to London Time Conversion Table
| Mumbai (IST) | London (GMT) |
|---|---|
| 12:00 AM | 7:30 PM |
| 2:00 AM | 9:30 PM |
| 4:00 AM | 11:30 PM |
| 6:00 AM | 1:30 AM |
| 8:00 AM | 3:30 AM |
| 10:00 AM | 5:30 AM |
| 12:00 PM | 7:30 AM |
| 2:00 PM | 9:30 AM |
| 4:00 PM | 11:30 AM |
| 6:00 PM | 1:30 PM |
| 8:00 PM | 3:30 PM |
| 10:00 PM | 5:30 PM |
Mumbai & London — Business & Scheduling Guide
Mumbai (India) is one of the fastest-growing major economies, with key industries in IT services, business process outsourcing, pharmaceuticals, and textiles. London (United Kingdom) is a leading center for finance and international trade, known for finance, insurance, media, and professional services. With a 5.5-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Mumbai and London
The 5.5-hour difference between Mumbai and London requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Indian business hours typically run 9:30 AM–6:30 PM, and many IT firms align shifts with US/UK client hours. British business culture values politeness and punctuality, with typical hours of 9 AM–5:30 PM. Teams often designate specific "overlap hours" for real-time collaboration and use asynchronous communication (Slack, email, recorded video) for the rest of the day.
Daylight Saving Time Considerations
London observes Daylight Saving Time (GMT/BST), while Mumbai stays on IST year-round. When London switches to daylight time, the effective time difference shifts by 1 hour. This typically happens in spring and fall, and the exact dates vary by country. If you have recurring cross-timezone meetings, recalculate the schedule after each DST transition.
IST to GMT — Quick Reference
IST (IST) stands for the timezone used in Mumbai, India (UTC+5:30). GMT (GMT/BST) is the timezone used in London, United Kingdom (UTC+0). Mumbai is 5 hours and 30 minutes ahead of London.
To convert IST to GMT, subtract 5.5 hours from IST time. For example, IST 9:00 AM = GMT 3:30 AM.
Key Facts
- •Time difference: Mumbai (UTC+5:30) is 5 hours and 30 minutes ahead of London (UTC+0).
- •Daylight Saving Time: Mumbai does not observe DST (IST). London observes DST (GMT/BST).
- •Regions: Mumbai is located in India and uses the IST time zone. London is located in United Kingdom and uses the GMT/BST time zone.
- •Best time to call: The best time to call between Mumbai and London is 3:00 PM to 4:00 PM in Mumbai time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Mumbai and London?
Mumbai is 5 hours and 30 minutes ahead of London.
What time is it in London when it's 9 AM in Mumbai?
When it's 9:00 AM in Mumbai, it is 3:30 AM in London.
What time is 9 PM IST in GMT?
9 PM IST (Mumbai time) is 3:30 PM GMT (London time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Mumbai and London?
The best time to schedule a meeting is between 3:00 PM to 4:00 PM in Mumbai time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert IST to GMT?
IST (IST) is the timezone for Mumbai, India (UTC+5:30). GMT (GMT/BST) is the timezone for London, United Kingdom (UTC+0). Mumbai is 5 hours and 30 minutes ahead of London. Quick examples: 9 AM IST = 3:30 AM GMT, 12 PM IST = 6:30 AM GMT, 3 PM IST = 9:30 AM GMT, 6 PM IST = 12:30 PM GMT.
Is Mumbai ahead of or behind London?
Mumbai is 5 hours 30 minutes ahead of London. When it's noon in Mumbai, it's 6:30 AM in London.
Does Mumbai or London change clocks for Daylight Saving Time?
No, Mumbai does not observe DST — it stays on IST year-round. London observes DST and switches between GMT/BST. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
Related Time Zone Conversions
More from Mumbai
Convert to London
Working across time zones?
Auto-sync calendar events into your timesheet — no matter what time zone your team is in. Connect Google Calendar, Teams, or Zoom and export a polished timesheet in seconds.
No credit card required. Free forever plan available.