Time Difference: London and India
India is 5 hours 30 minutes ahead of London in winter and 4 hours 30 minutes ahead in summer. 10:00 AM in London is 3:30 PM in India on GMT and 2:30 PM on BST.
London Mornings, India Afternoons
With 9-to-5 days on both sides, the overlap sits in London's morning. In winter, 9:00 AM to 11:30 AM in London is 2:30 PM to 5:00 PM in India, 2 hours 30 minutes. In summer, 9:00 AM to 12:30 PM in London is 1:30 PM to 5:00 PM in India, an hour longer. In both seasons it is India's 5 PM close that ends the window.
| London | India (GMT → IST) | India (BST → IST) |
|---|---|---|
| 8:00 AM | 1:30 PM | 12:30 PM |
| 9:00 AM | 2:30 PM ✓ | 1:30 PM ✓ |
| 10:00 AM | 3:30 PM ✓ | 2:30 PM ✓ |
| 11:00 AM | 4:30 PM ✓ | 3:30 PM ✓ |
| 12:00 PM | 5:30 PM | 4:30 PM ✓ |
| 1:00 PM | 6:30 PM | 5:30 PM |
| 2:00 PM | 7:30 PM | 6:30 PM |
| 3:00 PM | 8:30 PM | 7:30 PM |
| 4:00 PM | 9:30 PM | 8:30 PM |
| 5:00 PM | 10:30 PM | 9:30 PM |
| 6:00 PM | 11:30 PM | 10:30 PM |
Each row is an hour of the London day. A check mark means both cities are inside a 9 AM to 5 PM working day at that moment.
- GMT → IST: 2 hours 30 minutes shared, 9:00 AM to 11:30 AM London time.
- BST → IST: 3 hours 30 minutes shared, 9:00 AM to 12:30 PM London time.
UK to India: the Two Gaps
India is UTC+5:30 all year, so the only moving part is the UK clock:
- GMT (last Sunday in October to last Sunday in March): India is 5 hours 30 minutes ahead of the UK.
- BST (last Sunday in March to last Sunday in October): India is 4 hours 30 minutes ahead of the UK.
If you fix a UK call at a London time, the India time moves in March and October: 10:00 AM London is 3:30 PM in India on GMT and 2:30 PM on BST.
Adding the Half Hour
Add 5 hours 30 minutes in winter, or 4 hours 30 minutes in summer. 11:00 AM in London is 4:30 PM in India on GMT and 3:30 PM on BST.
Going the other way, take the same amount off. India's 9:00 AM is 3:30 AM in London in winter and 4:30 AM in summer, so the India morning is London's small hours. Quote the India time in the invite so the half hour doesn't catch anyone out.
London Time in India, Every Hour
Each column is one real season of the London-India gap. Pick the column that matches your date.
| 🇬🇧 London (GMT) | 🇮🇳 India (GMT → IST) | 🇮🇳 India (BST → IST) |
|---|---|---|
| 00:00 | 05:30 | 04:30 |
| 03:00 | 08:30 | 07:30 |
| 06:00 | 11:30 | 10:30 |
| 09:00 | 14:30 | 13:30 |
| 12:00 | 17:30 | 16:30 |
| 15:00 | 20:30 | 19:30 |
| 18:00 | 23:30 | 22:30 |
| 21:00 | 02:30(next day) | 01:30(next day) |
- GMT → IST: last Sunday in October to last Sunday in March, while the UK is on GMT
- BST → IST: last Sunday in March to last Sunday in October, while the UK is on BST
* "next day" / "prev day" = the converted time falls on a different calendar date.
A Late-Morning London Call With India
A London team that calls India at 10:30 AM reaches 4:00 PM on GMT and 3:00 PM on BST. A 12:00 PM start is 5:30 PM on GMT and 4:30 PM on BST, at the end of the India day on BST and after it on GMT.
If India hosts at 3:00 PM, London joins at 9:30 AM on GMT and 10:30 AM on BST. An India-hosted series moves an hour on the London clock in March and October.